Home Must Checkout 13 Free Coolest App of 2021

Must Checkout 13 Free Coolest App of 2021

In the app market today, there are millions of apps. They are so much in number that it seems impossible to find an app that perfectly fulfills your needs, but keeps trying! Here are the 13 Free Coolest apps of 2021.

When we see a new app it looks cool and inspiring, but when compared to these 13 apps, other apps don’t seem so enticing. The future will be very different from nowadays. The free coolest apps of 2021 are apps that are trending in the year 2021 and you should know about them before they go viral.

13 Free Coolest Apps of 2021 Are:

Mind Leak – Use Apps Less!

Are you worried about your screen time? Check out Mind leak which will make you aware of when you keep using certain apps for too long. When this happens, the app will show you yourself staring into the phone (or alternatively someone else staring) as a reminder that your mind leaked. This will help you reduce your time in the apps you wanna useless.

Stop doom scrolling and reduce your screen time! The idea of seeing yourself staring might seem funny at first, but it’s actually quite effective at reducing the time you spend procrastinating. It’s an unusual way to fight the addictive algorithms of social media, support digital minimalism, or start a digital detox.

There are no ads or analytics and the app relies on generosity alone. Your data is safe, will only be stored locally, and never be shared with anybody. The app has a 4.3-star rating & takes only 7.9 MB from your storage. 


  • Reduce your screen time
  • Stats & customize the overlays
  • Attractive gifs for alerts
  • No Ads & analytics



Krypto is an exclusive app for crypto exchange. The app is user-friendly & secure to do any transaction. Krypto was founded in 2019 and tills now has 300k+ users and it’s growing exponentially. 

But what makes it top of the list? Apart from buying & selling, Krypto has pay & send features which makes it unique from other apps. With the help of the Krypto pay feature, you can pay to any UPI address by just scanning from the app and money will be deducted from your Krypto balance. Krypto also offers gift cards by which you can win up to 0.2 BTC for free.

Also, you send any cryptocurrency anywhere in the world in just a few minutes with help of its Krypto send feature. The customer support team of this app is very impressive by providing 24*7 chat support. No matter if you are a beginner or pro, the app has a separate feature to choose beginner or pro mode as per your convenience. Krypto App is available on both Android & iOS app stores.


  • Daily Assured Free Cryptocurrencies Rewards
  • Scan & Pay to any UPI through crypto wallet
  • 0% Trading Fee
  • User-Friendly Design
  • Send Cryptocurrencies to anyone for free
  • 24*7 Customer Support


Privacy Dashboard

Have you ever thought about which apps are accessing your privacy permission without telling you? Well! Now you don’t have to, as the Privacy dashboard will keep track of that. It is not only the free coolest apps of 2021 but also a must-have app for every android user.

Privacy dashboard has a simple and clear timeline view of accesses to location, microphone, and camera. This app mainly focuses on bringing features of “Privacy Dashboard” as seen in DP2 of android 12 to older devices.


  • Beautiful Interface.
  • Privacy Indicators (permission icon will appear in the top-right corner when permission is used)
  • Light/Dark Theme.
  • Dashboard for 24-hour app usage on the home screen.
  • Detailed view of permission/app usage.
  • No unnecessary permissions.

Also Read, The Future of Advertising in Applications


Who touched my phone?

Nowadays, we are worried about phone privacy. The application will record those who will use your phone using the front camera in the background mode, invisibly for the user. You will see who, when and what did to your favorite device while it is not under your attention.

This app uses the Device Administrator permission. The application needs device administrator rights to look out for incorrect unlock attempts. Android only detects a password or pattern as incorrect if it has at least 4 digits/characters or pattern dots.

With the help of this app, you can find who is trying to unlock your phone. The application is very lightweight and consumes only 3.7 Mb only. Also, It has 4.7 ratings on Playstore.


  • Very Lightweight
  • Captures Pic Instantly
  • Safeguard Your Phone From Stangers
  • Recording, Saving & browse reports


Fluid Simulation

Feel bored or anxious? This app can solve your problem! Play with relaxing fluids with a touch of your fingers. Play and experiment with these swirling substances. Gorgeous visuals will take your breath away and help you to relieve stress. You can also use the app as live wallpaper.

This beautiful creation can help you to chill, meditate, relax, relieve this pesky anxiety from your mind and enjoy your moment of life, right now. When you first launch it you’re gonna be frozen by beauty, that magnificence, that you have never ever seen before. 

Believe it or not, you will become happy playing it, squeezing every second from it, to experience love and connection to our big universe. Is it not yet convincing for you? Then you are the type of person that this app is made for. It’s going to reassure your grumpiness and you would become a very enjoyable person to be around with. 


  • Help you in Relaxation 
  • Smooth UI
  • Relieve this pesky anxiety
  • Millions of Colours

best android apps


Opera GX: Gaming Browser

Are you a hardcore gamer? Check out Opera GXthat brings the gaming style to your mobile with custom skins, GX Corner, FAB navigation, Flow, an ad blocker, and more, all in a secure private browser. A gamer is a gamer, on any device.

Opera GX’s unique design is inspired by gaming and gaming gear, with the same style that won the desktop GX browser the Red Dot and IF Design awards. Choose from custom themes like GX Classic, Ultra Violet, Purple Haze, and White Wolf.

Always just a tap away, GX Corner brings you daily gaming news, an upcoming release calendar, and trailers. It’s everything a gamer needs to stay on top of the latest news and gaming deals in their mobile web browser.


  • World’s 1st Game Browser
  • Custom Skins
  • Dark & Light Mode
  • One-Handed Navigation
  • Ad-Free & Fater Browsing


Radio Garden

Are you a radio lover and want to explore global radio stations? Radio Garden allows you to listen to thousands of live radio stations worldwide by rotating the globe.

Every green dot represents a city or town. Tap on it to tune into the radio stations broadcasting from that city.

By adding new stations every day and updating ones that no longer work, we hope to give you a smooth international radio listening experience. It saves your favorite stations for later listening. Don’t worry: the radio will keep playing, even if your phone goes to sleep.


  • Over 25,000 Radio Stations
  • Connect to Distant Cultures
  • Connect to Local Communities
  • Dark Mode
  • Save Your favorite Stations



Is your smartphone battery drain quickly? Checkout Naptime. Naptime is a battery saver app that lowers your device’s power consumption while the display is off by empowering Android’s built-in doze power-saving functionality. Faster idle means less power being consumed unnecessarily. By default, doze can take a while to kick in so Naptime just speeds up that process automatically for you.

It can also automatically disable W-iFi, mobile data, location & Bluetooth as soon as the doze kicks in. Experimental features such as automatic Android Battery Saver, Aggressive Doze timings, Aggressive Doze scheduling times, and location detection. Now you have profiles so you can load them up on-demand based on your usage and accessible from Quick Tiles.


  • Doze power-saving functionality
  • Location detection
  • Appealing UI
  • Aggressive Doze timings
  • Doze scheduling times


Android 12 Clock Widgets

Are you a clock lover and want to customize your boring default clock? Check out Android 12 clock widgets to experience amazing clocks. It is one of the free coolest apps of 2021 which makes your home screen really interesting & cool.

It has animated Analog clocks and native seconds animation features which makes it cool & interesting. You can customize the clocks with various styles & colors. The best part of this app is that it’s safe, light, and has 0 battery usage. 


  • Light Analog Clock
  • Digital Clock with customization
  • Dark Analog Clock
  • Premium colored Analog and digital styles
  • System Based Themes
  • Animated Analog clocks 
  • Frame Analog Clock

Also Read, Witness the Rising Emergence of Mobile App in the Healthcare Sector


Bitwarden Password Manager

Do you have issues managing3 your passwords? Why don’t you hire a password manager? Just kidding. Checkout Bitwarden! Bitwarden delivers open-source password management solutions to everyone, whether at home, at work, or on the go. Generate strong, unique, and random passwords based on security requirements for every website you frequent.

The encrypted files created by Bitwarden are stored on the servers of the company, and you can send those files directly to anyone. The team and enterprise plans let you share passwords securely with colleagues and organizations.

Bitwarden is an open-source password management tool that provides secure cloud-based storage. If you want to move away from using the same password for everything, Bitwarden is the solution you’re looking for.


  • Built-in Password Generator
  • Super Handy
  • World-Class Encryption
  • Cross-Platform Applications

Free Cool Apps


KWGT Kustom Widget Maker

Do you love widgets? If yes, then this app is just for you. Kustom the most powerful Widget creator and even and and and and and and and and and and even animation maker, allows you to create your own designs, display any data you need, at once or one by one, without draining your battery.

You can create your own designs for Customized widgets and lock screens, and display any data you need, at once.

With Kustom Widget you can create customized widgets like Digital and Analog Clocks, Live Map Widget, Weather Widget, Text Widget, sophisticated Battery or Memory meters, randomly changing images, Music Players, World clocks, Astronomy widgets, and many more.


  • 1000+ free widgets
  • Text with custom fonts, colors, sizes, and effects
  • Shapes like Ovals, Rects, Arcs, Triangles, Hexagons and more
  • 3D flip transformations, curved and skewed text
  • Gradients, shadows, tiling, and color filters
  • Zooper like progress bars and series


3D Effect Launcher – Cool Live Effect, Wallpaper

Most of us don’t like our default mobile launcher. The default launcher is boring & not appealing.  3D Effect Launcher is a good launcher that can make your mobile phone fresh, new and cool. It also provides you with useful features which you don’t have in your native launcher. 3D Effect Launcher can make your daily mobile life more efficient.

3D Effect Launcher provides many features that aren’t included in your phone’s default launcher, they can help you to find what you want quickly and more efficiently. Also, the size of the app is only 18 MB and has 500,000+ users.

It is designed to work with Samsung Galaxy S, Galaxy A series of phones, Huawei Mate/Honor/P series of phones, Xiaomi/Redmi series of phones. It also is designed to works on almost ALL Android 5.0.


  • 10+ gestures support
  • Hide apps, and you can add lock on hidden apps
  • Tools: Junk cleaner, Battery saver
  • App stats
  • Kids mode
  • And many more…


Phone Secret Tricks

Do you love phone tricks? This app will help you with plenty of cool phone tricks which you definitely don’t know. Check out Phone Secret Tricks. This app will help you to easily get the most out of your Android device. It will teach you how to do that. 

You can increase your knowledge about your Android phone. This app will also help you learn many tips and tricks that you never knew. Also, these tips and tricks will help you get the most out of your Android device, whether you’re a beginner or a pro.

Although there are many apps on the market claiming to teach you how to use your mobile device, many of them lack adequate information to get you started quickly. The size of this app is 4.7M and has 100,000+ installs.


  • User-friendly interface.
  • Take Screenshot.
  • Deleted Notification recovery.
  • Android Useful Tricks
  • Unknow facts
  • And many more…



No matter what you love doing, there’s an app for that.  So whether you’re looking to keep yourself occupied, or you’re trying to get things done, there’s an app for that. Without apps, your smartphone is not a smartphone.

These free coolest apps of 2021 make a phone a smartphone. We really hope these above 13 cool apps of 2021 will make your using your smartphone more interesting. Most of these apps are free to use. Yeah, you can upgrade these apps by just paying an extra $ to purchase any subscriptions.

You can also check out our recent article on Top 10 Enterprise Mobile App Trends to Consider in 2021

In 2021, a lot of mobile apps will be released in the App Store and the Google Play Store. We really hope these above apps really add value to your smartphone using experience.

If you found this article helpful then it will be great if you share it with your friends & families. If you have any questions then please comment below we will answer them asap. 


Thanks for reading. Have a good day!


About ReadWrite’s Editorial Process

The ReadWrite Editorial policy involves closely monitoring the tech industry for major developments, new product launches, AI breakthroughs, video game releases and other newsworthy events. Editors assign relevant stories to staff writers or freelance contributors with expertise in each particular topic area. Before publication, articles go through a rigorous round of editing for accuracy, clarity, and to ensure adherence to ReadWrite's style guidelines.

Vikram Goel

Vikram is a freelance writer & tech enthusiast. He loves to write on the latest technology, apps & digital world.

Get the biggest tech headlines of the day delivered to your inbox

    By signing up, you agree to our Terms and Privacy Policy. Unsubscribe anytime.

    Tech News

    Explore the latest in tech with our Tech News. We cut through the noise for concise, relevant updates, keeping you informed about the rapidly evolving tech landscape with curated content that separates signal from noise.

    In-Depth Tech Stories

    Explore tech impact in In-Depth Stories. Narrative data journalism offers comprehensive analyses, revealing stories behind data. Understand industry trends for a deeper perspective on tech's intricate relationships with society.

    Expert Reviews

    Empower decisions with Expert Reviews, merging industry expertise and insightful analysis. Delve into tech intricacies, get the best deals, and stay ahead with our trustworthy guide to navigating the ever-changing tech market.