# Kiiro vs INTVL

The clearest difference is in-app purchases: Kiiro at none against INTVL's 1. Kiiro also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. INTVL sells 1 in-app purchase, starting at $39.99 per year. Kiiro asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. Both last shipped on October 10, 2026.

## The numbers

| Metric | Kiiro | INTVL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/kiiro-running-trainer-and-plans/id6749277384/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free | — |
| Size | 55 MB | 87 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [endurance101 OÜ](https://appshunter.io/developer/1824960103) | [Imperial Sales & Marketing GmbH](https://appshunter.io/developer/1818132010) |

## What reviewers say

### Kiiro

[App page](https://appshunter.io/ios/app/kiiro-running-trainer-and-plans/id6749277384)

This app helps runners understand their training by analyzing data like training load, heart rate zones, and progress. It provides clear insights and warnings to prevent overtraining and ensure effective workouts.

**Highlights:** Training load analysis, Heart rate zone tracking, Progress visualization, VO2 max trends, Automatic route matching, Personal records

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

**In-app purchases:** none


### INTVL

[App page](https://appshunter.io/ios/app/intvl-interval-timer/id6759198513)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| INTVL Pro Annual | $39.99 | per year |


## Frequently asked questions

### Is Kiiro free?

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

### Is INTVL free?

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

### Do Kiiro or INTVL have ads?

INTVL shows ads; Kiiro does not.

### Which is updated more often, Kiiro or INTVL?

Kiiro ships an update fortnightly, and INTVL fortnightly. Most recently, Kiiro was updated on October 10, 2026 and INTVL 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.*