# HIIT Timer / Interval Timer vs Kiro

The clearest difference is ads: Kiro at none against HIIT Timer / Interval Timer's shown. Kiro also leads on iOS requirement (15.1 vs 26.0). On price, update cadence, 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.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | HIIT Timer / Interval Timer | Kiro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (14 ratings)](https://appshunter.io/ios/app/hiit-timer-interval-timer/id1610842683/reviews)** | — |
| Number of ratings | **14** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 12 MB | 70 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FugaPiyo Inc.](https://appshunter.io/developer/1497887610) | [Kiro Sports](https://appshunter.io/developer/1818083080) |

## What reviewers say

### HIIT Timer / Interval Timer

[App page](https://appshunter.io/ios/app/hiit-timer-interval-timer/id1610842683)

This app provides a customizable timer for high-intensity interval training. Easily set up warm-up, workout, and cool-down periods with adjustable intervals and counts. Personalize colors, sounds, and notifications for a tailored experience.

**Highlights:** Unlimited timer creation, Customizable intervals (warm-up, workout, cool-down), Adjustable counts, Color and sound customization, Dark mode support, Background notifications

**Features:** Vision Pro support

**In-app purchases:** none


### Kiro

[App page](https://appshunter.io/ios/app/kiro/id6746716313)

**In-app purchases:** none


## Frequently asked questions

### Is HIIT Timer / Interval Timer free?

HIIT Timer / Interval Timer is free to download, with no in-app purchases.

### Is Kiro free?

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

### Do HIIT Timer / Interval Timer or Kiro have ads?

HIIT Timer / Interval Timer shows ads; Kiro does not.

### Which is updated more often, HIIT Timer / Interval Timer or Kiro?

HIIT Timer / Interval Timer ships an update every 2 months, and Kiro every 2 months. Most recently, HIIT Timer / Interval Timer was updated on October 4, 2026 and Kiro on October 10, 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.*