Top Free Tools Apps in Republic of Korea

PDF Reader & View PDF Files ❓Looking for a simple app to open, read, and annotate PDF files on your phone? PDF Reader & View PDF Files gives you all the essential tools you need to work with PDF documents more easily.

📌 Key Features
✓PDF viewer for smooth reading
✓PDF scanner using phone camera
✓Merge multiple PDF files
✓Split PDF by selected pages
✓Annotate with notes and highlights
✓Create ZIP files for easy sharing
✓Print PDFs directly from the app
✓Bookmark important pages
✓Rename files for better organization

📕View and Read PDF Files Smoothly
PDF Reader lets you open and view PDF files. You can scroll through pages, zoom in to see details clearly, and navigate large documents with ease.

📕Scan Documents to PDF
Turn your phone into a portable scanner. Use your device's camera to scan documents, receipts, notes, or paperwork and save them as PDF files.

📕Merge and Split PDF Files
Easily combine multiple PDF files into one document when you need to send or store files together. You can also split a large PDF into smaller files by selecting specific pages, giving you full control over your documents.

📕Annotate and Mark PDFs
Add notes, highlights, and drawings directly to your PDF files. Annotation tools help you review documents, mark important information, or take notes while reading.

📕Create ZIP Files
Compress PDF files into ZIP archives to save storage space or share multiple documents more easily.

📕Print PDF Documents
Print PDF files directly from the app using a compatible printer. This feature enables you to obtain paper copies quickly without needing a computer.

📕Bookmark and Organize File
Bookmark important pages so you can return to them instantly. Rename PDF files easily to keep your documents well-organized and easy to find.

🔥PDF Reader & View PDF Files is designed to be easy to use while providing powerful tools for everyday document tasks. Download app now!

Install PDF Reader & View PDF Files now and manage your documents more conveniently. Please give us feedback if you like this app. Thank you for choosing our app. PDF Reader & View PDF Files , a leading app in the Tools Apps category, boasts a robust user base with a total of 1B installs. It sees impressive engagement with 700M monthly installs and 25M daily installs, reflecting its popularity and usability. The app generates significant monthly revenue, indicative of its effective monetization strategies and user satisfaction. The app supports in-app purchases, allowing users to enhance their experience with additional features and content. PDF Reader & View PDF Files was first released December 25, 2025, and has been continually updated, with the latest update rolled out just April 01, 2026. This commitment to regular updates ensures that users always have access to the latest features and improvements. The app and is currently on version 1.1.1. With 75 reviews, PDF Reader & View PDF Files maintains a strong presence in the market, supported by numerous rating votes that attest to its reliability and effectiveness in helping users achieve their Top charts free play goals.

Clean Sweep Junk Files Is your phone constantly running out of storage space? Clean Sweep Junk Files is an all-in-one toolbox that combines deep cleaning, device information monitoring, and app management – helping you easily free up space and keep your device stable at all times.

Core Features

Intelligent deep scanning to clean cache files, residual logs, redundant data, and other types of junk files

Specially displays large media files for you to manage with ease

Shows a list of recently opened apps for convenient management

Download Clean Sweep Junk Files now and give your device a thorough spring cleaning. Clean Sweep Junk Files , a leading app in the Tools Apps category, boasts a robust user base with a total of 252M installs. It sees impressive engagement 11M daily installs, reflecting its popularity and usability. The app generates significant monthly revenue, indicative of its effective monetization strategies and user satisfaction. The app supports in-app purchases, allowing users to enhance their experience with additional features and content. Clean Sweep Junk Files was first released April 25, 2026, and has been continually updated, with the latest update rolled out just May 19, 2026. This commitment to regular updates ensures that users always have access to the latest features and improvements. The app and is currently on version 1.0.1. With 28 reviews, Clean Sweep Junk Files maintains a strong presence in the market, supported by numerous rating votes that attest to its reliability and effectiveness in helping users achieve their Top charts free play goals.

Find My Phone by Clap Launcher Do you often misplace or lose your phone? Then Find My Phone by Clap Launcher is the perfect app for you!

Find My Phone by Clap Launcher is a smart device finder designed to help you quickly locate a missing phone simply by clapping or whistling. When you clap or whistle, your phone will make a sound, vibrate, and flash, making it easy to find your device in seconds.

Please note: As a launcher app, the layout of your home screen may change after install. Don’t worry, all your apps are still on your phone, they just may be in a different location. To learn more, please visit our FAQ section: https://findmyphonelauncher.com/#faq

With a launcher app, you get powerful device finder tools and added benefits:
✓ One swipe access: activate the clap detector and whistle sensor by swiping right from your home screen to instantly start finding your phone.
✓ Home screen widget: see the time, weather, and more conveniently on your home screen with our customized widget.
✓ Wallpaper: personalize your home or lock screen with themed wallpapers.
✓ Home screen shortcut: add a shortcut to quickly find mobile device whenever they go missing.
✓ Multi touchpoint search: apps and web search has never been easier. Search for installed apps or the web powered by Yahoo from multiple access points.

Key Free Features:
✓ Clap alarm and whistle detection
✓ Loud sound, flashlight, and vibration alerts
✓ Customizable alert sounds and duration
✓ Battery efficient performance

👏 Find My Phone by Clapping
Start clapping or whistling to activate advanced sound recognition. This smart lost phone finder responds instantly to help you locate your device.

💡 Multi Alert System
When triggered, the app plays a loud ringtone, flashes the flashlight, and vibrates, making it easy to spot your phone anywhere.

🎵 Customizable Alerts
Choose from whistles, melodies, animal sounds, and electronic tones.

⏰ Set Alert Duration
Select how long the alarm rings: 10, 30, 60, or 120 seconds.

🔋 Battery Friendly
Optimized to run in the background with minimal battery usage.

✨ Easy to Use
A simple interface with no complicated setup required.

📲 Versatile Compatibility
Works across multiple phone models and helps you quickly find mobile devices whether they are set to silent, vibrate, or full volume.

Find My Phone by Clap Launcher is an efficient phone finder that gives you the power to locate your device in seconds. Download now and never worry about losing your phone again.

If you have any questions, feedback, or feature suggestions, feel free to write to us. You can uninstall the app at any time.

You give your consent to install Find My Phone by Clap Launcher from the Google Play Store by clicking the button above. You also agree to this app's Terms and Conditions and Privacy Policy.

Google Play is a trademark of Google LLC. Use of it here does not imply any affiliation with or endorsement by Google LLC.

Yahoo is a registered trademark of Apollo Global Management, Inc.

For questions or feedback, reach out to us through our contact form: https://findmyphonelauncher.com/contact-us

Terms of Service:https://findmyphonelauncher.com/terms-of-service
Privacy Policy:https://findmyphonelauncher.com/privacy-policy Find My Phone by Clap Launcher , a leading app in the Tools Apps category, boasts a robust user base with a total of 2B installs. It sees impressive engagement with 500M monthly installs and 11M daily installs, reflecting its popularity and usability. The app generates significant monthly revenue, indicative of its effective monetization strategies and user satisfaction. The app supports in-app purchases, allowing users to enhance their experience with additional features and content. Find My Phone by Clap Launcher was first released July 15, 2025, and has been continually updated, with the latest update rolled out just May 19, 2026. This commitment to regular updates ensures that users always have access to the latest features and improvements. The app and is currently on version 1.12.1. With 7284 reviews, Find My Phone by Clap Launcher maintains a strong presence in the market, supported by numerous rating votes that attest to its reliability and effectiveness in helping users achieve their Top charts free play goals.

Volume Control Sound Launcher Do you sometimes wish your phone’s volume controls were easier to manage?

With Volume Control Sound Launcher, every sound - from your favorite songs to morning alarms - feels just right. This audio launcher gives you quick access to the tools you need for a smoother and more personalized sound experience.

This launcher app puts all your essential volume settings just one swipe away, making it easy to increase volume, fine-tune your sound, and enjoy better control throughout the day. Whether you want a simple volume booster, clearer calls, or more balanced media sound, everything is easier to manage in one place.

Whether you’re enjoying music, watching videos, gaming, or taking calls, Volume Control Sound Launcher helps you create a more balanced and satisfying listening experience that fits your lifestyle. Use it as a sound enhancer for everyday phone use, to make music louder, or as a practical tool when you need faster access to your sound settings.

Please note: As a launcher app, the layout of your home screen may change after install. Don’t worry, all your apps are still on your phone - they just may be in a different location. To learn more, please visit our FAQ section: https://phonevolumecontrol.com/#faq

With a launcher app, you get the added benefits of:

🚀 One-swipe access
Quickly adjust your device’s volume with just one swipe from your home screen.

📱Home screen widget
See the time, weather, and more, conveniently on your home screen with our customized widget.

🖼️ Wallpaper
Personalize your home or lock screen with a wide selection of beautiful themed wallpapers.

🔍 Multi-touchpoint search
Apps and web search have never been easier. Search for installed apps or the web (powered by Yahoo) from multiple access points.

Here’s why you’ll love this free app:
- Easily adjust volume for music, videos, calls, alarms, and notifications
- Manage all system sounds quickly from one convenient location
- Use smart controls designed for max volume, daily comfort, and better listening clarity
- Convenient access to all your volume settings in one place

Who is it suitable for?
This free volume booster app is ideal for anyone who values convenience and clarity in their daily phone use. Whether you’re relaxing with music, taking an important call, or waking up to an alarm.

Download Volume Control Sound Launcher now and take your audio experience to the next level.

Please write to us should you have any queries or comments about the app, including recommendations for new features. Also, please note that you can uninstall it at any time.

You give your consent to install Volume Control Sound Launcher from the Google Play™ Store by clicking the button above. You also agree to this app’s Terms and Conditions & Privacy Policy.

Google Play is a trademark of Google LLC. Use of it here does not imply any affiliation with or endorsement by Google LLC.

Yahoo is a registered trademark of Apollo Global Management, Inc.

For questions or feedback, reach out to us through our contact form: https://phonevolumecontrol.com/contact-us

Terms of Service: https://phonevolumecontrol.com/terms-of-service
Privacy Policy: https://phonevolumecontrol.com/privacy-policy Volume Control Sound Launcher , a leading app in the Tools Apps category, boasts a robust user base with a total of 739M installs. It sees impressive engagement with 300M monthly installs and 21M daily installs, reflecting its popularity and usability. The app generates significant monthly revenue, indicative of its effective monetization strategies and user satisfaction. The app supports in-app purchases, allowing users to enhance their experience with additional features and content. Volume Control Sound Launcher was first released December 03, 2025, and has been continually updated, with the latest update rolled out just May 18, 2026. This commitment to regular updates ensures that users always have access to the latest features and improvements. The app and is currently on version 1.6.0. With 2505 reviews, Volume Control Sound Launcher maintains a strong presence in the market, supported by numerous rating votes that attest to its reliability and effectiveness in helping users achieve their Top charts free play goals.

Google Authenticator Google Authenticator adds an extra layer of security to your online accounts by adding a second step of verification when you sign in. This means that in addition to your password, you'll also need to enter a code that is generated by the Google Authenticator app on your phone. The verification code can be generated by the Google Authenticator app on your phone, even if you don't have a network or cellular connection.
* Sync your Authenticator codes to your Google Account and across your devices. This way, you can always access them even if you lose your phone.
* Set up your Authenticator accounts automatically with a QR code. This is quick and easy, and it helps to ensure that your codes are set up correctly.
* Support for multiple accounts. You can use the Authenticator app to manage multiple accounts, so you don't have to switch between apps every time you need to sign in.
* Support for time-based and counter-based code generation. You can choose the type of code generation that best suits your needs.
* Transfer accounts between devices with a QR code. This is a convenient way to move your accounts to a new device.
* To use Google Authenticator with Google, you need to enable 2-Step Verification on your Google Account. To get started visit http://www.google.com/2step Permission notice: Camera: Needed to add accounts using QR codes Google Authenticator , a leading app in the Tools Apps category, boasts a robust user base with a total of 314B installs. It sees impressive engagement with 5B monthly installs and 161M daily installs, reflecting its popularity and usability. The app generates significant monthly revenue, indicative of its effective monetization strategies and user satisfaction. The app supports in-app purchases, allowing users to enhance their experience with additional features and content. Google Authenticator was first released March 21, 2012, and has been continually updated, with the latest update rolled out just March 27, 2026. This commitment to regular updates ensures that users always have access to the latest features and improvements. The app and is currently on version 7.1. With 41629 reviews, Google Authenticator maintains a strong presence in the market, supported by numerous rating votes that attest to its reliability and effectiveness in helping users achieve their Top charts free play goals.

Network WiFi Scan Network WiFi Scan is a convenient and easy-to-use WiFi analyzer and network tool designed to help you understand your current wireless environment.

Main features:

Quickly scan current WiFi networks and view detailed information, including SSID, channel, MAC address, and more.

Signal strength graph to help you better understand your WiFi.

Lightweight and portable, no unnecessary permissions required, privacy-focused.

Download now and take full control of your wireless network! Network WiFi Scan , a leading app in the Tools Apps category, boasts a robust user base with a total of 167M installs. It sees impressive engagement 18M daily installs, reflecting its popularity and usability. The app generates significant monthly revenue, indicative of its effective monetization strategies and user satisfaction. The app supports in-app purchases, allowing users to enhance their experience with additional features and content. Network WiFi Scan was first released April 27, 2026, and has been continually updated, with the latest update rolled out just May 17, 2026. This commitment to regular updates ensures that users always have access to the latest features and improvements. The app and is currently on version 1.0. With 15 reviews, Network WiFi Scan maintains a strong presence in the market, supported by numerous rating votes that attest to its reliability and effectiveness in helping users achieve their Top charts free play goals.

PDF Reader: View All PDFs ⁉️Looking for an easy way to work with your PDF files? PDF Reader lets you open and read PDFs smoothly. You can also edit documents and create ZIP files. Download now!

🔴MAIN FEATURES OF PDF READER APP:
✔View PDFs easily
✔Edit text, highlight, or draw on files.
✔Scan documents and save as PDFs.
✔Create ZIP files easily
✔Convert image to PDF
✔Easy Merge or Split PDF

🔺PDF Viewer
Open and read all your PDF documents quickly. Enjoy a smooth reading experience with clear text, simple navigation. You can comfortably read eBooks, reports, or work documents anytime.

🔺PDF Editor
You can draw or highlight important parts, add text or notes for reference, and move to any page instantly. This makes reviewing, commenting, and updating documents more convenient.

🔺PDF Scanner
Use your camera to scan paper documents, receipts, or notes, and instantly save them as high-quality PDF files. This feature helps you organize your papers digitally and keep all your important files in one place.

🔺Create ZIP
Easily create Zip files to combine multiple documents into one folder. You can save storage space, share several files at once.

🔺Image to PDF
Turn your photos into PDF files quickly. You can select images from your gallery or camera and convert them into clean, high-quality PDFs.

🔺Merge PDF
Combine multiple PDF files into a document. This helps you keep your files organized and easy to share.

🔺Split PDF
Separate large PDF files into smaller parts. You can choose specific pages and save them as new PDF documents for easier use.

📌Other Features:
➡︎ Rename PDF
➡︎ Sort by modified date/file size
➡︎ Bookmark your important PDF

🎉Thank you for using PDF Reader! We hope you enjoy the app. Your feedback means a lot to us and helps make PDF Reader even better. Please rate the app or share your thoughts. We would love to hear from you. PDF Reader: View All PDFs , a leading app in the Tools Apps category, boasts a robust user base with a total of 2B installs. It sees impressive engagement with 900M monthly installs and 64M daily installs, reflecting its popularity and usability. The app generates significant monthly revenue, indicative of its effective monetization strategies and user satisfaction. The app supports in-app purchases, allowing users to enhance their experience with additional features and content. PDF Reader: View All PDFs was first released November 12, 2025, and has been continually updated, with the latest update rolled out just April 01, 2026. This commitment to regular updates ensures that users always have access to the latest features and improvements. The app and is currently on version 1.1.8. With 86 reviews, PDF Reader: View All PDFs maintains a strong presence in the market, supported by numerous rating votes that attest to its reliability and effectiveness in helping users achieve their Top charts free play goals.

PDF Reader - Editor & Viewer Looking for a powerful PDF Reader and a versatile All Document Reader? You’ve found the ultimate app! Whether you need to process business documents, read a novel, or review code, our app is the all-in-one Document Viewer you need.

More than just a standard PDF Viewer, it’s a fully-featured File Reader and Office Reader designed to handle over 30+ file formats effortlessly. From advanced PDF editing to extracting images from Office files, this app streamlines your daily digital workflow.

🚀 CORE FEATURES:

📚 Universal All Document Reader
• Office Documents: Use it as your daily Word viewer, Excel reader, and PowerPoint viewer. Read DOCX, open XLSX, and enjoy a seamless PPTX viewer experience.
• Ebook Reading: Love reading? We are a dedicated Ebook reader functioning perfectly as an EPUB reader, MOBI reader, and FB2 reader.
• Geek & Developer Friendly: Review notes easily with our built-in Markdown reader, MD file viewer, and RTF reader. Support to read text files smoothly.
• Data Files: Built-in CSV reader for quick data reviews.

🛠️ Powerful PDF Editor & Tools
• Annotate & Edit: Easily add text to PDF, annotate PDF, and write on PDF pages. Perfect to fill PDF forms on the go.
• Organize PDF: Merge PDF documents into one, or split PDF pages to extract what you need.
• Optimize: Compress PDF size to save storage or make email sharing easier. Directly print documents from your device.

🔄 Advanced Converter & Image Extractor
• Convert formats: Quickly turn Image to PDF, Word to PDF, Excel to PDF, or Convert Office to PDF with high quality.
• Convert to Image: Change PDF to Image (PDF to JPG) in seconds.
• Unrivaled Extractor: Unlike other apps, our PDF image extractor allows you to easily extract images from PDF. Even better, you can seamlessly extract pictures from Word/PPT files!

🔒 Ultimate Security & Privacy
• Lock & Protect: Keep sensitive data safe. Password protect PDF, encrypt Word document, and secure PowerPoint. You can easily lock PDF files from unauthorized access.
• Remove Protection: Need to read an encrypted file? Quickly decrypt PDF, remove PDF password, or unlock Office files (provided you have the original password).

📁 SUPPORTED FORMATS (30+ Extensions):
We ensure maximum compatibility so you never have to download multiple apps again:
• Word: DOC, DOCX, DOCM, DOT, DOTX, DOTM
• Excel: XLS, XLSX, XLSM, XLTM, XLT, XLTX
• PowerPoint: PPT, PPTX, PPTM, PPS, POT, POTX, POTM, PPSX, PPSM
• EBooks: EPUB, MOBI, FB2
• Text & Code: MD, MARKDOWN, TXT, CSV, RTF
• PDF Document: PDF

Experience the most productive PDF Converter and File Reader today. Simplify your work, protect your privacy, and read any file, anytime!

Download now and turn your phone into a powerful mobile office! PDF Reader - Editor & Viewer , a leading app in the Tools Apps category, boasts a robust user base with a total of 8B installs. It sees impressive engagement with 900M monthly installs and 41M daily installs, reflecting its popularity and usability. The app generates significant monthly revenue, indicative of its effective monetization strategies and user satisfaction. The app supports in-app purchases, allowing users to enhance their experience with additional features and content. PDF Reader - Editor & Viewer was first released May 22, 2024, and has been continually updated, with the latest update rolled out just May 15, 2026. This commitment to regular updates ensures that users always have access to the latest features and improvements. The app and is currently on version 4.7.0. With 439 reviews, PDF Reader - Editor & Viewer maintains a strong presence in the market, supported by numerous rating votes that attest to its reliability and effectiveness in helping users achieve their Top charts free play goals.

QR & Barcode Scanner QR & Barcode Scanner app is the fastest QR code scanner / bar code scanner out there. QR & Barcode Scanner is an essential QR reader for every Android device.

QR & Barcode Scanner / QR code reader is extremely easy to use; with quick scan built in simply point QR code scanner free app to QR or barcode you want to scan and QR scanner will automatically start scanning and QR scan it. No need to press any buttons, take photos or adjust zoom as barcode reader works automatically.

QR & Barcode Scanner can scan and read all QR codes / barcode types including text, url, ISBN, product, contact, calendar, email, location, Wi-Fi and many more formats. After scan and automatic decoding user is provided with only the relevant options for individual QR (qu r code) or Barcode type and can take appropriate action. You can even use QR & Barcode Scanner to scan coupons / coupon codes to receive discounts and save some money.

QR code scanner for Android, barcode scanner app is also QR code generator in your pocket. Using QR generator is extremely easy to use, simply enter the data you wish on QR code and click to generate QR codes.

QR codes are everywhere! Install qrcode reader app to scan QR code or to scan barcode on the go. Barcode & QR Scanner app is the only free qr code scanner app you will ever need. Turn on the flashlight for scanning in the dark or use pinch to zoom to scan QRs far away.

With barcode reader app you can also scan product barcodes. Scan with bar code reader in shops and compare prices with online prices to save money. QR & Barcode Scanner app is the only free QR code reader / barcode scanner you will ever need.

Other functionality of QR code reader / QR code scanner: Create QR, Scan QR from image, Scan QR from Gallery, Share your contact info via QR, share images to scan from other apps, generate QR codes from clipboard content, change color, theme of the app, use dark mode, use Batch scan mode to scan multiple QR codes at once, export as .csv .txt, import .csv, add to Favorities, easy share... You can also use QR code scanner for wifi password QRs.

Introducing the ultimate all-in-one QR and Barcode scanning solution, designed for seamless integration with your Android device. This QR Scanner App is not just a QR Code Scanner; it's a comprehensive tool that lets you effortlessly scan QR codes and barcodes anytime, anywhere. With its dual functionality, you can also generate your own QR codes, making it a versatile tool for both personal and professional use.

This intuitive Barcode Scanner App streamlines the process of reading any barcode, offering quick and accurate results. Whether you're scanning a QR code or a barcode, our advanced technology ensures a smooth, hassle-free experience. This QR Code Scanner Free app offers top-notch features without any cost, making it accessible for all Android users.

The Barcode Scanner Free feature is a testament to our commitment to providing high-quality services at no extra charge. For those looking for an efficient QR Reader App, this application offers unmatched speed and reliability. Similarly, as a Barcode Reader App, it stands out for its precision and user-friendly interface.

This QR Code Scanner for Android is tailored to meet the needs of Android users, offering seamless integration with your device's capabilities. Likewise, the Barcode Scanner for Android is optimized for the Android platform, ensuring smooth operation and compatibility.

This QR code scanner for wifi password also specializes in scanning WiFi QR codes, seamlessly connecting you to wireless networks without the need to enter passwords manually.

For Android enthusiasts seeking a reliable QR Reader Android app, this application offers the perfect blend of speed and accuracy. The Barcode Reader Android functionality further enhances its appeal, making it a must-have tool for every Android user. QR & Barcode Scanner , a leading app in the Tools Apps category, boasts a robust user base with a total of 820B installs. It sees impressive engagement with 9B monthly installs and 268M daily installs, reflecting its popularity and usability. The app generates significant monthly revenue, indicative of its effective monetization strategies and user satisfaction. The app supports in-app purchases, allowing users to enhance their experience with additional features and content. QR & Barcode Scanner was first released March 13, 2015, and has been continually updated, with the latest update rolled out just February 03, 2026. This commitment to regular updates ensures that users always have access to the latest features and improvements. The app and is currently on version 2.2.65. With 427860 reviews, QR & Barcode Scanner maintains a strong presence in the market, supported by numerous rating votes that attest to its reliability and effectiveness in helping users achieve their Top charts free play goals.

Cleaner Toolbox Cleaner Toolbox is an Android cleaning tool.

Main features:
Junk Cleaner: Clean cache files, temporary files and residual files in the phone.
Battery Information: Display basic battery information to help you understand the battery status.
Uninstall Apps: Select and uninstall apps you no longer need.
Background Processes: View and manage apps running in the background of your phone.

Come and download Cleaner Toolbox! Cleaner Toolbox , a leading app in the Tools Apps category, boasts a robust user base with a total of 12B installs. It sees impressive engagement with 900M monthly installs and 30M daily installs, reflecting its popularity and usability. The app generates significant monthly revenue, indicative of its effective monetization strategies and user satisfaction. The app supports in-app purchases, allowing users to enhance their experience with additional features and content. Cleaner Toolbox was first released June 05, 2024, and has been continually updated, with the latest update rolled out just November 04, 2025. This commitment to regular updates ensures that users always have access to the latest features and improvements. The app and is currently on version 1.1.5. With 8155 reviews, Cleaner Toolbox maintains a strong presence in the market, supported by numerous rating votes that attest to its reliability and effectiveness in helping users achieve their Top charts free play goals.