# My 30 days challenge vs 21DaysOfChange

The clearest difference is in-app purchases: My 30 days challenge at none against 21DaysOfChange's 4. 21DaysOfChange's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. 21DaysOfChange sells 4 in-app purchases, starting at $4.99 per month. My 30 days challenge asks for nothing beyond the download.

My 30 days challenge ships an update every 7 months, 21DaysOfChange every 9 months. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | My 30 days challenge | 21DaysOfChange |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 7 months** | Every 9 months |
| Size | 36 MB | 59 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mantas Kamarauskas](https://appshunter.io/developer/975306268) | [Hong Son Vu](https://appshunter.io/developer/1767993431) |

## What reviewers say

### My 30 days challenge

[App page](https://appshunter.io/ios/app/my-30-days-challenge/id1603257090)

**Features:** macOS Compatibility

**In-app purchases:** none


### 21DaysOfChange

[App page](https://appshunter.io/ios/app/21daysofchange/id6677019535)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 21DaysOfChange Monthly Premium | $4.99 | per month |
| 21DaysOfChange Monthly Business | $12.99 | per month |
| 21DaysOfChange Yearly Premium | $34.99 | per year |
| 21DaysOfChange Yearly Business | $89.99 | per year |


## Frequently asked questions

### Is My 30 days challenge free?

My 30 days challenge is free to download, with no in-app purchases.

### Is 21DaysOfChange free?

21DaysOfChange is free to download, with in-app purchases available.

### Do My 30 days challenge or 21DaysOfChange have ads?

My 30 days challenge shows ads; 21DaysOfChange does not.

### Which is updated more often, My 30 days challenge or 21DaysOfChange?

My 30 days challenge ships an update every 7 months, and 21DaysOfChange every 9 months. Most recently, My 30 days challenge was updated on October 25, 2026 and 21DaysOfChange on October 30, 2026.

---

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