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App Store Apps > Lifestyle > The 21 Days Challenge
The 21 Days Challenge icon

The 21 Days Challenge

8.7.30
Kati Pereira
4.71
571 reviews
Free

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Screenshots by Kati Pereira, from the the App Store listing
View on the App Store Also on Google Play

AppBrain's verdict

EstablishedLoved by users
Rating on App Store
4.71
571 ratings
Last updated
October 17, 2026
Size
127.2 MB

Users love it: 4.7 stars from 571 ratings.

Official page on the App Store

User feedback

Ratings and reviews on the App Store

Comments on The 21 Days Challenge for iOS

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Store listing

By Kati Pereira, from the App Store
Description by Kati Pereira Written by the developer, not by AppBrain. Click to read.
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 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, trying to be more productive, simple practices to find happiness and calm in your life, how to study effectively for all the students, ways to spread kindness and positivity, tips for fixing your sleeping schedule and daily positive affirmations are some of the challenges that you can find in the app.

Once you complete your daily task, you can mark as completed and collect the points (to customize your avatar). This way, you can use this app like a habit tracker.

In the gratitude challenge, you can write your thoughts and share them in the feed (you can leave anonymously too). Here you're going to see all the community answers and you can also give it a like on your favorite ones.

Complete tasks on your profile and do daily challenges to collect points so you can buy items for your own avatar like different hairstyles, eyes and mouth shapes and clothes.
Create a healthier and happier mind with journaling. With this app you can daily journal and choose your daily mood. Then you can track your mood in the calendar and see all your previous records.
You also a have a selection of positive wallpapers for your phone.

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

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

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Safety and technology

Found in the app by AppBrain
Price
Free
App size
127.2 MB
Content rating
Everyone

Technologies used by The 21 Days Challenge

Releases

Updates seen on the App Store
Version
8.7.30
Launched
November 2019

No changelog data

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Rankings

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About the app and developer

About The 21 Days Challenge

The 21 Days Challenge is a lifestyle app developed by Kati Pereira.

User Ratings

The 21 Days Challenge is rated 4.71 out of 5 stars. The rating is based on 570 ratings.

App Information

The 21 Days Challenge is freely available from the App Store. The app size is 127.17 MB. The latest version available is 8.7.30. The last update was on October 17, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since November 2019.

The 21 Days Challenge is made and published by Kati Pereira. AppBrain is an independent app data site and isn't affiliated with Kati Pereira. The app name, icon, screenshots and description belong to Kati Pereira and are shown as published on the App Store.

Developer information for Kati Pereira

Kati Pereira

Address:

Frequently asked questions about The 21 Days Challenge

Is The 21 Days Challenge free?

Yes. The 21 Days Challenge is free on the App Store.

Is The 21 Days Challenge still available?

Yes. The 21 Days Challenge is on the App Store, and the last update we saw was on October 17, 2026.

How large is The 21 Days Challenge?

The 21 Days Challenge is 127.17 MB.

Is The 21 Days Challenge suitable for children?

App Store rates the content of The 21 Days Challenge as suitable for everyone.

How do people rate The 21 Days Challenge?

The 21 Days Challenge scores 4.71 out of 5 stars, from 571 ratings on the App Store.

Who made The 21 Days Challenge?

The 21 Days Challenge was developed by Kati Pereira. It is listed in the lifestyle category on the App Store.

What are the best alternatives to The 21 Days Challenge?

People looking at The 21 Days Challenge also look at these lifestyle apps: عقار Aqar | Saudi Real Estate, Floward Online Flowers & Gifts, Question Diary, Picky: K-Beauty, Create & Earn, Daylio Journal - Mood Tracker.

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