# 21DaysOfChange vs HabitCommit

The clearest difference is update cadence: HabitCommit at fortnightly 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 $4.99 per month and HabitCommit sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

21DaysOfChange ships an update every 9 months, HabitCommit fortnightly. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 21DaysOfChange | HabitCommit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Fortnightly** |
| Size | 59 MB | 51 MB |
| Requires iOS | 16.4 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hong Son Vu](https://appshunter.io/developer/1767993431) | [Jan Nosek](https://appshunter.io/developer/1855463729) |

## 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 | $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 |


### HabitCommit

[App page](https://appshunter.io/ios/app/habitcommit-habit-tracker/id6755675838)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - Monthly | $0.99 | per month |
| Pro - Annual | $8.99 | per year |
| Pro - Lifetime Access | $29.99 | one-time |


## Frequently asked questions

### Is 21DaysOfChange free?

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

### Is HabitCommit free?

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

### Do 21DaysOfChange or HabitCommit have ads?

Neither 21DaysOfChange nor HabitCommit shows ads.

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

21DaysOfChange ships an update every 9 months, and HabitCommit fortnightly. Most recently, 21DaysOfChange was updated on October 30, 2026 and HabitCommit on October 28, 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.*