# Interval Timer ~ HIIT & Tabata vs Shift

The clearest difference is ads: Shift at none against Interval Timer ~ HIIT & Tabata's shown. Interval Timer ~ HIIT & Tabata's advantage is update cadence (every 2 days vs every 4 days) and iOS requirement (18.0 vs 26). On price, 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.

Interval Timer ~ HIIT & Tabata ships an update every 2 days, Shift every 4 days. The most recent releases landed on September 29, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Interval Timer ~ HIIT & Tabata | Shift |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 4 days |
| Size | 9 MB | 30 MB |
| Requires iOS | **18.0** | 26 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [manabu ueda](https://appshunter.io/developer/1606163236) | [Jorick van Meijeren](https://appshunter.io/developer/1882811593) |

## What reviewers say

### Interval Timer ~ HIIT & Tabata

[App page](https://appshunter.io/ios/app/interval-timer-hiit-and-tabata/id6762538816)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Shift

[App page](https://appshunter.io/ios/app/shift-workout-interval-timer/id6805132734)

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

**In-app purchases:** none


## Frequently asked questions

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

Interval Timer ~ HIIT & Tabata is free to download, with no in-app purchases.

### Is Shift free?

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

### Do Interval Timer ~ HIIT & Tabata or Shift have ads?

Interval Timer ~ HIIT & Tabata shows ads; Shift does not.

### Which is updated more often, Interval Timer ~ HIIT & Tabata or Shift?

Interval Timer ~ HIIT & Tabata ships an update every 2 days, and Shift every 4 days. Most recently, Interval Timer ~ HIIT & Tabata was updated on September 29, 2026 and Shift on September 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.*