# FoxNotes vs 21 Days

The clearest difference is in-app purchases: 21 Days at none against FoxNotes's 3. FoxNotes's advantage is update cadence (every 2 weeks vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. FoxNotes sells 3 in-app purchases, starting at $2.99 per 7 days. 21 Days asks for nothing beyond the download.

FoxNotes ships an update every 2 weeks, 21 Days every 3 weeks. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | FoxNotes | 21 Days |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 14 MB | 18 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Do Anh](https://appshunter.io/developer/646231301) | [Phaisan Thauaonsamut](https://appshunter.io/developer/6773761501) |

## What reviewers say

### FoxNotes

[App page](https://appshunter.io/ios/app/foxnotes-note-taker/id6670165851)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Journal Planner Premium Weekly | $2.99 | per 7 days |
| Journal Planner Premium Yearly | $19.99 | per year |
| Journal Premium Lifetime | $29.99 | one-time |


### 21 Days

[App page](https://appshunter.io/ios/app/21-days-habit-builder/id6773761499)

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

**In-app purchases:** none


## Frequently asked questions

### Is FoxNotes free?

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

### Is 21 Days free?

21 Days is free to download, with no in-app purchases.

### Do FoxNotes or 21 Days have ads?

Neither FoxNotes nor 21 Days shows ads.

### Which is updated more often, FoxNotes or 21 Days?

FoxNotes ships an update every 2 weeks, and 21 Days every 3 weeks. Most recently, FoxNotes was updated on October 7, 2026 and 21 Days on October 24, 2026.

---

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