# The 21 Days Challenge vs YELW

The clearest difference is in-app purchases: YELW at none against The 21 Days Challenge's 2. YELW also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. The 21 Days Challenge sells 2 in-app purchases, starting at $2.99 per month. YELW asks for nothing beyond the download.

## The numbers

| Metric | The 21 Days Challenge | YELW |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (576 ratings)](https://appshunter.io/ios/app/the-21-days-challenge/id1485458184/reviews)** | — |
| Number of ratings | **576** | — |
| Positive reviews | 92.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 128 MB | 23 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kati Pereira](https://appshunter.io/developer/1697931524) | [The First Model](https://appshunter.io/developer/1831196998) |

## What reviewers say

### The 21 Days Challenge

[App page](https://appshunter.io/ios/app/the-21-days-challenge/id1485458184)

Build life-changing habits with guided 21-day challenges. Track progress, journal your thoughts, and customize your avatar. This app helps you cultivate happiness, productivity, and a healthier lifestyle.

**Highlights:** 21-day habit challenges, Daily task completion tracking, Avatar customization with points, Community gratitude journal, Mood tracking and calendar, Positive wallpapers, Daily reminders

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads month | $2.99 | per month |
| Remove Ads Year | $24.99 | per year |

**What reviewers like**

- 🚀 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

**What reviewers complain about**

- 🔍 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

**Reported bugs**

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

**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


### YELW

[App page](https://appshunter.io/ios/app/yelw/id6792713541)

**In-app purchases:** none


## Frequently asked questions

### Is The 21 Days Challenge free?

The 21 Days Challenge is free to download, with in-app purchases available.

### Is YELW free?

YELW is free to download, with no in-app purchases.

### Do The 21 Days Challenge or YELW have ads?

The 21 Days Challenge shows ads; YELW does not.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*