The 21 Days Challenge
Kati Pereira Lifestyle iPhoneiPadiPod touch
The 21 Days Challenge is a free Lifestyle app for iPhone and iPad by Kati Pereira. Rated 4.7/5 from 574 ratings. Requires iOS 15.0. Updated October 17, 2026.
- Rating
- 4.7
- 574 ratings
- Price
- Free
- on the App Store
- Size
- 127 MB
- Age 4+
- Updated
- Oct 17
- 2026 · v8.7.30
Screenshots
About The 21 Days Challenge
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/
Ratings & reviews
4.7
574 ratings
What’s new
Version 8.7.30 · Updated October 17, 2026
Running smoother Under-the-hood updates for a steadier app, plus small fixes. "Begin at once to live, and count each separate day as a separate life." — Seneca
App privacy
The developer, Kati Pereira, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers: Device ID
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Identifiers: Device ID
- Diagnostics: Crash Data
Used for: Third-Party Advertising, Analytics
Alternatives to The 21 Days Challenge
Looking for apps like The 21 Days Challenge? Here are 6 similar apps on the App Store. The highest rated is كتكوتي - Katkoty (4.6/5), and all 6 are free to download.
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واعي - للتعافي من الإدمان
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Yammak - يمك
4.5
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Ehsan | إحسان
4.6
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| The 21 Days Challenge | 4.7 / 5 (574 ratings) | Free | October 17, 2026 | |
| كتكوتي - Katkoty | 4.6 / 5 (214) | Free | Sep 23, 2026 | Compare |
| Cenomi Plus | 4.6 / 5 (1,046) | Free | Oct 26, 2026 | Compare |
| Wocute - sister in your life | 4.1 / 5 (306) | Free | Mar 13, 2026 | Compare |
| واعي - للتعافي من الإدمان | 4.6 / 5 (2,640) | Free | Oct 20, 2026 | Compare |
| Yammak - يمك | 4.5 / 5 (1,102) | Free | Oct 23, 2026 | Compare |
| Ehsan | إحسان | 4.6 / 5 (1,008) | Free | Aug 20, 2026 | Compare |