# 21DaysOfChange vs UnboundAlpha

The clearest difference is update cadence: UnboundAlpha at every 6 days 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 UnboundAlpha sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

21DaysOfChange ships an update every 9 months, UnboundAlpha every 6 days. The most recent releases landed on September 18, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | 21DaysOfChange | UnboundAlpha |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 days** |
| Size | 59 MB | 107 MB |
| Requires iOS | **16.4** | 17.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hong Son Vu](https://appshunter.io/developer/1767993431) | [Jesse Panganiban](https://appshunter.io/developer/1786077926) |

## 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 |


### UnboundAlpha

[App page](https://appshunter.io/ios/app/unboundalpha/id6751717950)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access | $1.99 | per 7 days |
| All Access | $4.99 | per month |
| All Access | $19.99 | per year |


## Frequently asked questions

### Is 21DaysOfChange free?

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

### Is UnboundAlpha free?

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

### Do 21DaysOfChange or UnboundAlpha have ads?

Neither 21DaysOfChange nor UnboundAlpha shows ads.

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

21DaysOfChange ships an update every 9 months, and UnboundAlpha every 6 days. Most recently, 21DaysOfChange was updated on September 18, 2026 and UnboundAlpha on September 16, 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.*