# Interval Timer · Tabata & HIIT vs Calix AI

The clearest difference is update cadence: Calix AI at every 6 days against Interval Timer · Tabata & HIIT's monthly. Interval Timer · Tabata & HIIT's advantage is iOS requirement (18.0 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Interval Timer · Tabata & HIIT sells 3 in-app purchases, starting at $2.99 per month and Calix AI sells 4 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

Interval Timer · Tabata & HIIT ships an update monthly, Calix AI every 6 days. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Interval Timer · Tabata & HIIT | Calix AI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | — | Freemium |
| Size | 6 MB | 26 MB |
| Requires iOS | **18.0** | 26.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [jean-baptiste delcros](https://appshunter.io/developer/1727119809) | [Luzhnov Kirill](https://appshunter.io/developer/1870106953) |

## What reviewers say

### Interval Timer · Tabata & HIIT

[App page](https://appshunter.io/ios/app/interval-timer-tabata-and-hiit/id6757807644)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly plan | $2.99 | per month |
| Lifetime Access | $9.99 | one-time |
| Lifetime Access | $19.99 | one-time |


### Calix AI

[App page](https://appshunter.io/ios/app/calix-ai/id6759933105)

This intelligent companion helps you track your nutrition and fitness. It uses AI to estimate calories and macronutrients from meal photos or descriptions and syncs with health data. Get personalized meal planning and assessment support.

**Highlights:** AI food recognition for calorie and macronutrient estimates, Meal photo and description input, Syncs with Apple Health for automatic tracking, Personalized meal planning and assessment, Privacy-focused data handling

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calix Premium | $8.99 | per month |
| Calix Premium Monthly | $9.99 | per month |
| Calix Premium Yearly | $59.99 | per year |
| Calix Premium | $59.99 | per year |


## Frequently asked questions

### Is Interval Timer · Tabata & HIIT free?

Interval Timer · Tabata & HIIT is free to download, with in-app purchases available.

### Is Calix AI free?

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

### Do Interval Timer · Tabata & HIIT or Calix AI have ads?

Neither Interval Timer · Tabata & HIIT nor Calix AI shows ads.

### Which is updated more often, Interval Timer · Tabata & HIIT or Calix AI?

Interval Timer · Tabata & HIIT ships an update monthly, and Calix AI every 6 days. Most recently, Interval Timer · Tabata & HIIT was updated on October 18, 2026 and Calix AI on October 24, 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.*