# ONE vs Onulchi

The clearest difference is update cadence: Onulchi at every 2 days against ONE's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ONE ships an update every 2 weeks, Onulchi every 2 days. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | ONE | Onulchi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 2 MB | 52 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [骋飞 武](https://appshunter.io/developer/6775319022) | [CHOHEE KIM](https://appshunter.io/developer/6811794262) |

## What reviewers say

### ONE

[App page](https://appshunter.io/ios/app/one-focus-deep-life-timer/id6777599934)

**In-app purchases:** none


### Onulchi

[App page](https://appshunter.io/ios/app/onulchi-routine-challenge/id6811794260)

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

**In-app purchases:** none


## Frequently asked questions

### Is ONE free?

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

### Is Onulchi free?

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

### Do ONE or Onulchi have ads?

Neither ONE nor Onulchi shows ads.

### Which is updated more often, ONE or Onulchi?

ONE ships an update every 2 weeks, and Onulchi every 2 days. Most recently, ONE was updated on October 28, 2026 and Onulchi on October 29, 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.*