# CoreFocus vs TsukiUsagi Timer

The clearest difference is in-app purchases: TsukiUsagi Timer at none against CoreFocus's 4. TsukiUsagi Timer also leads on ads (none vs shown) and update cadence (every 9 days vs every 4 weeks). CoreFocus's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.5). On price there is nothing between them.

Both are free to download. CoreFocus sells 4 in-app purchases, starting at $1.99 per 7 days. TsukiUsagi Timer asks for nothing beyond the download.

CoreFocus ships an update every 4 weeks, TsukiUsagi Timer every 9 days. The most recent releases landed on October 3, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | CoreFocus | TsukiUsagi Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 weeks | **Every 9 days** |
| Size | 63 MB | 15 MB |
| Requires iOS | **15.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Isuru Lakmal](https://appshunter.io/developer/1825451258) | [Kazumi Matsumoto](https://appshunter.io/developer/1845542621) |

## What reviewers say

### CoreFocus

[App page](https://appshunter.io/ios/app/corefocus-study-timer-and-farm/id6753196759)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CoreFocus Weekly Pro | $1.99 | per 7 days |
| CoreFocus Monthly Pro | $3.99 | per month |
| CoreFocus Yearly Pro | $14.99 | per year |
| CoreFocus Lifetime pro access | $19.99 | one-time |


### TsukiUsagi Timer

[App page](https://appshunter.io/ios/app/tsukiusagi-timer/id6753893693)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CoreFocus free?

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

### Is TsukiUsagi Timer free?

TsukiUsagi Timer is free to download, with no in-app purchases.

### Do CoreFocus or TsukiUsagi Timer have ads?

CoreFocus shows ads; TsukiUsagi Timer does not.

### Which is updated more often, CoreFocus or TsukiUsagi Timer?

CoreFocus ships an update every 4 weeks, and TsukiUsagi Timer every 9 days. Most recently, CoreFocus was updated on October 3, 2026 and TsukiUsagi Timer on October 13, 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.*