# Kaizen vs Noiseless

The clearest difference is in-app purchases: Noiseless at none against Kaizen's 2. Noiseless also leads on update cadence (every 5 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Kaizen sells 2 in-app purchases, starting at $3.99 per month. Noiseless asks for nothing beyond the download.

Kaizen ships an update every 2 weeks, Noiseless every 5 days. The most recent releases landed on October 1, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Kaizen | Noiseless |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Size | 68 MB | 6 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [MK Development](https://appshunter.io/developer/1853083060) | [Raphael araujo](https://appshunter.io/developer/6777990076) |

## What reviewers say

### Kaizen

[App page](https://appshunter.io/ios/app/kaizen-focus-and-study-timer/id6755314708)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (monthly) | $3.99 | per month |
| Premium (yearly) | $44.99 | per year |


### Noiseless

[App page](https://appshunter.io/ios/app/noiseless-focus-timer/id6777990074)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Kaizen free?

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

### Is Noiseless free?

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

### Do Kaizen or Noiseless have ads?

Neither Kaizen nor Noiseless shows ads.

### Which is updated more often, Kaizen or Noiseless?

Kaizen ships an update every 2 weeks, and Noiseless every 5 days. Most recently, Kaizen was updated on October 1, 2026 and Noiseless on September 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.*