# Kanso vs ONE

The clearest difference is in-app purchases: ONE at none against Kanso's 2. Kanso's advantage is update cadence (weekly vs every 2 weeks) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Kanso sells 2 in-app purchases, starting at $1.99 per month. ONE asks for nothing beyond the download.

Kanso ships an update weekly, ONE every 2 weeks. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Kanso | ONE |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Size | 32 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yutaro Kawahara](https://appshunter.io/developer/6776284160) | [骋飞 武](https://appshunter.io/developer/6775319022) |

## What reviewers say

### Kanso

[App page](https://appshunter.io/ios/app/kanso-zen-focus/id6776284158)

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kanso Pro (Monthly) | $1.99 | per month |
| Kanso Pro (Yearly) | $9.99 | per year |


### ONE

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

**In-app purchases:** none


## Frequently asked questions

### Is Kanso free?

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

### Is ONE free?

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

### Do Kanso or ONE have ads?

Neither Kanso nor ONE shows ads.

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

Kanso ships an update weekly, and ONE every 2 weeks. Most recently, Kanso was updated on October 12, 2026 and ONE on October 5, 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.*