# interval timer. hiit timer vs Zeno Self

The clearest difference is iOS requirement: Zeno Self at 15.1 against interval timer. hiit timer's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. interval timer. hiit timer sells 2 in-app purchases, starting at $1.99 per month and Zeno Self sells 3 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

interval timer. hiit timer ships an update every 3 weeks, Zeno Self every 6 weeks. Both last shipped on October 30, 2026.

## The numbers

| Metric | interval timer. hiit timer | Zeno Self |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 19 MB | 54 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [JOSUA NIKLAS ROCK](https://appshunter.io/developer/1686721446) | [Zeno AI Limited](https://appshunter.io/developer/1853458886) |

## What reviewers say

### interval timer. hiit timer

[App page](https://appshunter.io/ios/app/interval-timer-hiit-timer/id6743938787)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $14.99 | per year |


### Zeno Self

[App page](https://appshunter.io/ios/app/zeno-self-ai-journal-and-mood/id6755369780)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly premium | $12.99 | per month |
| Monthly premium & trial | $12.99 | per month |
| Annual Premium | $79.99 | per year |


## Frequently asked questions

### Is interval timer. hiit timer free?

interval timer. hiit timer is free to download, with in-app purchases available.

### Is Zeno Self free?

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

### Do interval timer. hiit timer or Zeno Self have ads?

Neither interval timer. hiit timer nor Zeno Self shows ads.

### Which is updated more often, interval timer. hiit timer or Zeno Self?

interval timer. hiit timer ships an update every 3 weeks, and Zeno Self every 6 weeks. Most recently, interval timer. hiit timer was updated on October 30, 2026 and Zeno Self on October 30, 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.*