# wow | واو vs The 21 Days Challenge

The clearest difference is in-app purchases: wow | واو at none against The 21 Days Challenge's 2. wow | واو also leads on ads (none vs shown) and iOS requirement (10.1 vs 15.0). The 21 Days Challenge's advantage is rating (4.7 vs 4.4) and ratings volume (575 vs 32). On price, review sentiment, update cadence and device support 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. wow | واو asks for nothing beyond the download.

The 21 Days Challenge holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: The 21 Days Challenge has 575 ratings behind it against 32, so its average is the more settled of the two. Written reviews complicate that: 100% of wow | واو's written reviews are positive against 92% of The 21 Days Challenge's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 4 weeks. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | wow | واو | The 21 Days Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (32 ratings)](https://appshunter.io/ios/app/wow/id1446573656/reviews) | **[4.7 (575 ratings)](https://appshunter.io/ios/app/the-21-days-challenge/id1485458184/reviews)** |
| Number of ratings | 32 | **575** |
| Positive reviews | **100.0% of reviews** | 92.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | Every 4 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 153 MB | 128 MB |
| Requires iOS | **10.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fahad Alshudukhi](https://appshunter.io/developer/1317611942) | [Kati Pereira](https://appshunter.io/developer/1697931524) |

## What reviewers say

### wow | واو

[App page](https://appshunter.io/ios/app/wow/id1446573656)

Discover the best deals on flights and hotel bookings. Compare products from popular online stores to find the lowest prices. Enjoy easy searching and booking for your next trip.

**Highlights:** Best flight prices, Hotel booking, Product price comparison, Online store comparison, Easy search and booking

**In-app purchases:** none


### 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 with earned points. Improve your mental well-being and create a happier lifestyle.

**Highlights:** Guided 21-day habit challenges, Daily journaling and mood tracking, Avatar customization with earned points, Community feed for gratitude sharing, Positive affirmations and wallpapers, Daily task completion tracking, Customizable 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


## Frequently asked questions

### Is wow | واو free?

wow | واو is free to download, with no in-app purchases.

### Is The 21 Days Challenge free?

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

### Which has better reviews, wow | واو or The 21 Days Challenge?

The 21 Days Challenge is rated higher. wow | واو averages 4.4 out of 5 from 32 ratings, while The 21 Days Challenge averages 4.7 from 575 ratings.

### Do wow | واو or The 21 Days Challenge have ads?

The 21 Days Challenge shows ads; wow | واو does not.

### Which is updated more often, wow | واو or The 21 Days Challenge?

wow | واو ships an update every 4 weeks, and The 21 Days Challenge every 4 weeks. Most recently, wow | واو was updated on November 2, 2026 and The 21 Days Challenge on November 7, 2026.

---

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