21 Days Challenge

Contains adsIn-app purchases
4.7
83.7K reviews
5M+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

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!
Updated on
Aug 1, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Personal info and Device or other IDs
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.7
81.9K reviews
Erin Held
December 10, 2024
I really like the premise of this app and I've enjoyed the few excersizes I have done so far. My only complaint is that everytime you complete a task, it says "Cancel" in grey or "Share" in bright yellow. It really takes away from the rewarding feeling to have to just say "Cancel". If it said "Complete" or something more satisfying I would give 5 stars. Also white font shouldn't be on a yellow background because it makes it difficult to read.
5 people found this review helpful
Did you find this helpful?
Lee Ann Wasson
February 21, 2021
I like the app, I did pay to go ad free. However, when the blog link is followed, there are ads there & what I just found disturbed me. There were 3 ads for "what to do if he's gone cold", what to text him, etc. "to get him back" in a post for self esteem which includes advice like don't sell yourself short, accept you the way you are, and more.
147 people found this review helpful
Did you find this helpful?
Antoinette Lee
February 1, 2024
This app has really helped me to develop better habits & routines, as well as become a more motivated & positive person. It's also gotten me to start journaling again, which has proved to be very eye-opening. The only complaint I have is that there's no eyebrow customization; you can customize your eyes, skin, mouth, hair, etc., but not the eyebrows. You're stuck with the default eyebrows, that are quite frankly, a bit ugly. If new eyebrow options are added, this would be a 5 star app for me!
64 people found this review helpful
Did you find this helpful?
Kati & Lima
February 13, 2024
Hi :) Delighted our app's helped you develop better habits and positivity! We're taking your feedback on eyebrow customization seriously and aim to enhance this feature. If you're pleased with future updates, we'd appreciate an updated review. Thanks for your input!

What’s new

New challenge :)

This is the beginning of anything you want <3