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Last updated on: 2026-06-13
Android Apps > Lifestyle > 21 Days Challenge
21 Days Challenge icon

21 Days Challenge

8.7.10
Kati & Lima
4.71
88,069 reviews
10,000,000+
Downloads
Free

21 days to introduce life changing habits in your life.

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iOS version

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About 21 Days Challenge

21 Days Challenge is a lifestyle app developed by Kati & Lima.

Download Statistics

21 Days Challenge has been downloaded 11 million times. In the last 30 days, the app was downloaded 70 thousand times. It is ranked in the top 100 lifestyle apps.

User Ratings

21 Days Challenge is rated 4.71 out of 5 stars. The rating is based on 88 thousand ratings.

App Information

21 Days Challenge is FREE to download. The APK download size is 50.06 MB. The latest version available is 8.7.10. The last update was on June 8, 2026.

Technical Requirements

21 Days Challenge requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play September 2019.

Description
Create your ideal life with life-changing habits.
It is estimated that it takes people 21 days to form a new habit. So it’s a perfect amount of time to change or introduce something new in your life. Choose the best challenge for you (or create your own) and do it for 21 days and you’re going to see how the habit becomes part of your lifestyle day by day.

Starting a healthy lifestyle, taking a break away from the internet, practicing gratitude, learning a new language, trying to be more productive, finding happiness, self-help, how to study effectively, ways to spread kindness and positivity, tips for fixing your sleeping schedule, self-care practices, decluttering, being more confident, writing journal prompts and daily positive affirmations are some of the challenges that you can find in the app.
Basically, you can use this app as a habit tracker.

Once you complete your daily task, you can mark it as completed and collect the points (to customize your avatar, to unlock motivational reminders and free wallpapers).

In the gratitude challenge, you can write your thoughts and share them in the feed (it can be anonymous too). Here you're going to see all the community answers and you can also give it a like, comment, or send gifts to your favorite ones.

Create a healthier and happier mind with journaling. With this app, you can write a daily journal and choose your daily mood. Then you can track your mood in the calendar and see all your previous records.

There’s a selection of positive wallpapers for your phone and motivational reminders to share with your friends. Also, some relaxing music.

Enable notifications and choose the time to be notified to remind you to do the challenge every day.

You have all of this in one app for free!

Don’t forget to take care of your body and mind. It's the only place you have to live.

Your journey to self-improvement and better mental health starts today!

Recent changes:
Smoother and steadier this time.

We fixed crashes in journal entries and the challenges screen, and made images load more reliably.
Show more Show less

More data about 21 Days Challenge

Price Free to download
Total downloads 11 million
Recent downloads 70 thousand
Rating 4.71 based on 88 thousand ratings
Ranking Highly ranked
Version 8.7.10
APK size 50.1 MB
Number of libraries 75
Designed for Android 6.0+
Suitable for Everyone
Ads Contains ads

App Performance Report

Get a detailed PDF report for 21 Days Challenge with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more

Get PDF Report — $29

Google Play Rating history and histogram

73K
9.5K
2.1K
1.6K
1.7K

Downloads over time

21 Days Challenge has been downloaded 11 million times. Over the past 30 days, it averaged 2.3 thousand downloads per day.

Changelog of 21 Days Challenge

Show changelog

Developer information for Kati & Lima

Kati & Lima

support@21dayschallenge.atlassian.net

Website

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Comments on 21 Days Challenge for Android

★★★★★ Tejasvini Kostekar · Jun 2, 2026
It is a very interesting app like we every time say we did challenge, but we forgot it this app notification remind us for challenge and really a task or challenge they give is small meaningful, so it's easy to get good habit throught that thank-you 💗
★★★★★ Tasnia Alam · Jun 2, 2026
Great app! I just love the daily motivation quotes that I get. I've been getting them for the last 3 years now, and I just am so grateful for these small daily reminders. It helps, truly!
★★★★★ Ayush Sarkar · May 30, 2026
Wow!! 😍❤️ it's such a cute and incredible app which helps me to create new habits on a daily basis 🔥. The daily reminder an easy-to-use user interface helps you to keep track of all my habits in a single place it also helps me to break my bad habits and create good habits change my life 🩵🧡 Deserves 5 star ⭐ ⭐ ⭐ ⭐ ⭐, nothing less than that hats of the developers for creating such an awesome app to build new habits and find new motive to live a very peaceful life 😍🥰.
★☆☆☆☆ Mahek Sayyad · May 31, 2026
This app is very good, but there is issue with it like when I open it it closes a right away. I've tried restarting my phone, clearing cashe, force stop nothing work. Please 🥺 take care of it asap .... it's very annoying when you make long progress in it...... It may have bugs!!! Developer please take care of it......
★☆☆☆☆ Ram Shah · Jun 7, 2026
This is an excellent app. It is so helpful to bring consistency in my every work and also bring consistency in my study. So, I recommend everyone to use this app to bring consistency in their work. Once you use this app you fall in love with this app. I am so thankful to this app.

Google Play Rankings for 21 Days Challenge

Top rankings

Rank Country Category List
34 Iran Lifestyle Top Free
182 India Lifestyle Top Free
Show all market rankings

Ranking history in Iran

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Technologies used by 21 Days Challenge

21 Days Challenge is requesting 25 permissions and is using 75 libraries.
Show details
21 Days Challenge - Habit App icon 21 Days Challenge - Habit App
Wipepp - Habit Tracking icon Wipepp - Habit Tracking
75 Soft Challenge Tracker icon 75 Soft Challenge Tracker
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Rise: Habit List icon Rise: Habit List
Micro Habits: Self-Improvement icon Micro Habits: Self-Improvement

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