# 21DaysOfChange vs quiet effort

The clearest difference is in-app purchases: quiet effort at none against 21DaysOfChange's 4. quiet effort also leads on update cadence (every 2 weeks vs every 9 months) and iOS requirement (14.0.0 vs 16.4). 21DaysOfChange's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. 21DaysOfChange sells 4 in-app purchases, starting at $5.99 per month. quiet effort asks for nothing beyond the download.

21DaysOfChange ships an update every 9 months, quiet effort every 2 weeks. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 21DaysOfChange | quiet effort |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 2 weeks** |
| Size | 59 MB | 48 MB |
| Requires iOS | 16.4 | **14.0.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hong Son Vu](https://appshunter.io/developer/1767993431) | [Healing Mates Digital Inc.](https://appshunter.io/developer/1780005337) |

## What reviewers say

### 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 | $5.99 | per month |
| 21DaysOfChange Monthly Business | $17.99 | per month |
| 21DaysOfChange Yearly Premium | $71.99 | per year |
| 21DaysOfChange Yearly Business | $214.99 | per year |


### quiet effort

[App page](https://appshunter.io/ios/app/quiet-effort-we-notice/id6746389173)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 21DaysOfChange free?

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

### Is quiet effort free?

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

### Do 21DaysOfChange or quiet effort have ads?

quiet effort shows ads; 21DaysOfChange does not.

### Which is updated more often, 21DaysOfChange or quiet effort?

21DaysOfChange ships an update every 9 months, and quiet effort every 2 weeks. Most recently, 21DaysOfChange was updated on October 5, 2026 and quiet effort on October 7, 2026.

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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.*