# Kaizen Timer vs Circuit Timer

The clearest difference is in-app purchases: Kaizen Timer at none against Circuit Timer's 2. Kaizen Timer also leads on update cadence (every 3 days vs monthly) and iOS requirement (17.6 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Circuit Timer sells 2 one-off in-app purchases. Kaizen Timer asks for nothing beyond the download.

Kaizen Timer ships an update every 3 days, Circuit Timer monthly. The most recent releases landed on September 14, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Kaizen Timer | Circuit Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Size | 3 MB | 7 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Dasic](https://appshunter.io/developer/1861310477) | [Lawman Services, LLC](https://appshunter.io/developer/446643752) |

## What reviewers say

### Kaizen Timer

[App page](https://appshunter.io/ios/app/kaizen-timer/id6758769895)

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

**In-app purchases:** none


### Circuit Timer

[App page](https://appshunter.io/ios/app/circuit-timer/id6759834943)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Core | $2.99 | one-time |
| Pro | $4.99 | one-time |


## Frequently asked questions

### Is Kaizen Timer free?

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

### Is Circuit Timer free?

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

### Do Kaizen Timer or Circuit Timer have ads?

Neither Kaizen Timer nor Circuit Timer shows ads.

### Which is updated more often, Kaizen Timer or Circuit Timer?

Kaizen Timer ships an update every 3 days, and Circuit Timer monthly. Most recently, Kaizen Timer was updated on September 14, 2026 and Circuit Timer on September 3, 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.*