# The 21 Days Challenge — Introduce life changing habits

> 21-day habit formation and lifestyle improvement app with gamified tracking. (iPhone/iPad app by Kati Pereira.)

- Source: https://appshunter.io/ios/app/the-21-days-challenge/id1485458184 (this page in markdown: same URL + `.md`)
- Developer: [Kati Pereira](https://appshunter.io/developer/1697931524)
- Category: Lifestyle, Productivity
- Price: Free with in-app purchases
- Rating: 4.70/5 from 543 App Store ratings · 296 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 116 MB
- Languages: American English
- Released: 2019-11-07
- Data updated: 2026-08-29
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/the-21-days-challenge/id1485458184/reviews.md

## What is 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/

## Key features

- 21-day habit challenges
- Habit tracking
- Avatar customization
- Daily journaling
- Mood tracking
- Community feed
- Positive affirmations

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Remove ads month | $1.99 | per month |
| Remove Ads Year | $17.99 | per year |


## What do users think of The 21 Days Challenge?

Overall sentiment: positive

**Pros**

- 🚀 Simple and motivating
- 👍 Clean design and clear progress tracking
- 🤗 Genuinely helpful and enjoyable to use
- 💫 Positive impact on mental health and habits
- 🌟 Inspirational and encouraging messages
- 🌱 Helps build healthy routines

**Cons**

- 🔍 Lack of search option in community challenges
- 🔀 Challenges disappear after creation, no way to find them
- 🤖 Too many ads interrupting the experience
- 🎨 App could use more customization options

**Commonly reported bugs**

- Sharing created challenges does not work as expected
- Challenges sometimes disappear from the app

**Most requested features**

- Add a search function for community challenges
- Allow users to save and revisit their own created challenges
- Provide more customization options for the app and user profile
- Introduce a widget for easier access to daily tasks

## Recent user reviews (10 of 296)

All indexed reviews: https://appshunter.io/ios/app/the-21-days-challenge/id1485458184/reviews.md

### 5/5 — Good

*2026-07-15, version 8.6.5*

Really good

### 5/5 — Living my best life<33

*2026-07-12, version 8.6.5*

An app that actually wants to make you better yourself and get out of your comfort zone! Amazing!!<3

### 5/5 — App For a reason

*2026-07-03*

One of the best app for 
To start new habits 
To start meditation productivity and much more

### 5/5 — Nice

*2026-07-02, version 8.6.5*

Nice

### 5/5 — nice app

*2026-06-25, version 8.6.5*

must try

### 5/5 — Love this app

*2026-06-13, version 8.6.5*

You should definitely get this app because it barely has adverts and it’s so nice and effective! 💕

### 5/5 — Great app

*2026-06-03, version 8.6.5*

I like it. I can say that this is a great idea.

### 5/5 — Great for daily challenge

*2026-05-28, version 8.6.5*

Love this app!!

### 1/5 — Forcing me towards Quran

*2026-05-19*

It keeps on giving advertisements and thats fine but the adds were only of Quran AI and its somehow trying to manipulate people towards Quran by showing the same add atleast 3-4 times a day for prolonged time. Manipulative app.

### 5/5 — Review

*2026-05-12, version 8.6.3*

Amazing app, do try!

## Frequently asked questions about The 21 Days Challenge

### What is the 21 Days Challenge app?

The 21 Days Challenge app helps users introduce and build life-changing habits over a 21-day period. It offers various challenges focused on health, productivity, happiness, and more. Users can track their progress, journal their experiences, and engage with a community.

### What kind of challenges can I find in the app?

The app offers a diverse range of challenges, including starting a healthy lifestyle, taking breaks from the internet, practicing gratitude, improving productivity, finding happiness and calm, studying effectively, spreading kindness, and fixing sleep schedules. It also includes daily positive affirmations.

### How does the habit tracking and avatar customization work?

You can mark your daily tasks as completed to earn points. These points can then be used to customize your avatar with various items like hairstyles, eyes, mouth shapes, and clothes, making it a gamified habit tracker.

### Is the app free to use?

The app is free to download and use, but it does offer in-app purchases and has advertisements. This means you can access core features without cost, but may choose to spend money for additional customization options or an ad-free experience.

### Can I use this app to improve my mental well-being?

Yes, the app supports mental well-being through features like daily journaling, mood tracking, and practicing gratitude. You can also find challenges focused on finding happiness, calm, and positive affirmations to cultivate a healthier mind.

## Version history (last 5 releases)

### 8.7.19 — 2026-08-15

A faster start and a friendlier feed.

No more waiting on launch — the loading stall that could hold you on the opening screen is gone.
Daily challenge reminders now arrive in your own language instead of English.
Comments are better: you can like a comment, and replying feels smoother throughout.
The likes count on your profile is accurate again.
Challenge artwork now ships with the app, so browsing challenges is instant — and new challenges still arrive automatically.
Plenty of quieter fixes for stability and speed.

"Little by little, a little becomes a lot." — Tanzanian proverb

### 8.6.5 — 2026-05-14

Your thoughts, your way.
Share with your name, share anonymously, or keep them just for you.

### 8.6.3 — 2026-04-13

Bug fixes & stability improvements
Better handling of image loading errors  
Smart reminders to help you stay on track with your challenges
Improved social feed experience
                                                                                                                                                                            
"The secret of getting ahead is getting started." — Mark Twain

### 8.5.10 — 2026-03-26

Send gifts even when low on coins.
Fixed challenge notification time not saving correctly.
"Small steps every day lead to big changes. Keep going!"

### 8.4.2 — 2026-03-01

Performance update, the app now starts faster on all devices.
This is the beginning of anything you want.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*