# 21DaysOfChange vs Streak21

The clearest difference is update cadence: Streak21 at every 4 weeks against 21DaysOfChange's every 9 months. On price, ads, in-app purchases 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 and Streak21 sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

21DaysOfChange ships an update every 9 months, Streak21 every 4 weeks. The most recent releases landed on September 18, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 21DaysOfChange | Streak21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/streak21/id6756655889/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 4 weeks** |
| Monetization | — | Freemium |
| Size | 59 MB | 67 MB |
| Requires iOS | **16.4** | 16.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hong Son Vu](https://appshunter.io/developer/1767993431) | [Wuhan smart mofun Technology Co., Ltd.](https://appshunter.io/developer/1411748090) |

## 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 |


### Streak21

[App page](https://appshunter.io/ios/app/streak21/id6756655889)

Build consistent habits with a simple, pressure-free tracker. Focus on showing up daily for 21-day cycles without complicated systems or scores. Designed for quiet structure and long-term consistency.

**Highlights:** Track habits in 21-day cycles, Simple daily yes/no check-ins, Streak-based progress, Minimalist interface, Optional reminders, Designed for long-term consistency

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Streak21 Premium (Monthly) | $2.99 | per month |
| Streak21 Premium (Annual) | $9.99 | per year |
| Streak21 Premium (Lifetime) | $24.99 | one-time |


## Frequently asked questions

### Is 21DaysOfChange free?

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

### Is Streak21 free?

Streak21 is free to download, with in-app purchases available.

### Do 21DaysOfChange or Streak21 have ads?

Neither 21DaysOfChange nor Streak21 shows ads.

### Which is updated more often, 21DaysOfChange or Streak21?

21DaysOfChange ships an update every 9 months, and Streak21 every 4 weeks. Most recently, 21DaysOfChange was updated on September 18, 2026 and Streak21 on September 9, 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.*