# Interval Timer vs Kaizen Timer

Interval Timer and Kaizen Timer are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Interval Timer sells 2 in-app purchases, starting at $1.99 per month and Kaizen Timer sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Interval Timer ships an update every 2 days, Kaizen Timer every 3 days. The most recent releases landed on October 29, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Interval Timer | Kaizen Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (77 ratings)](https://appshunter.io/ios/app/interval-timer-tabata-workout/id1522536309/reviews)** | — |
| Number of ratings | **77** | — |
| Positive reviews | 93.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 days |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 3 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mizo LLC](https://appshunter.io/developer/1820590289) | [Stefan Dasic](https://appshunter.io/developer/1861310477) |

## What reviewers say

### Interval Timer

[App page](https://appshunter.io/ios/app/interval-timer-tabata-workout/id1522536309)

This app provides a customizable round-based timer for various time-based activities, including HIIT, circuit training, and boxing. It features a minimalistic design with big digits and bright colors, offering hand-crafted sounds to maintain focus. Users can create complex workouts, save custom sets, and track their workout history with Apple Health integration.

**Highlights:** Customizable round-based timer, Minimalistic design with big digits, Hand-crafted sounds for focus, Unlimited saved intervals, Quick Set feature, Apple Health integration, Dark Mode support

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Intervals+ Monthly | $1.99 | per month |
| Intervals+ Lifetime | $9.99 | one-time |


### Kaizen Timer

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

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Kaizen Timer | $0.99 | per month |


## Frequently asked questions

### Is Interval Timer free?

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

### Is Kaizen Timer free?

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

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

Neither Interval Timer nor Kaizen Timer shows ads.

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

Interval Timer ships an update every 2 days, and Kaizen Timer every 3 days. Most recently, Interval Timer was updated on October 29, 2026 and Kaizen Timer on November 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*