# HIIT Trainer vs Shift

The clearest difference is iOS requirement: HIIT Trainer at 16.0 against Shift's 26. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HIIT Trainer ships an update every 2 days, Shift every 4 days. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | HIIT Trainer | Shift |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 4 days |
| Size | 14 MB | 30 MB |
| Requires iOS | **16.0** | 26 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [巧 唐](https://appshunter.io/developer/6790363579) | [Jorick van Meijeren](https://appshunter.io/developer/1882811593) |

## What reviewers say

### HIIT Trainer

[App page](https://appshunter.io/ios/app/hiit-trainer-interval-timer/id6790511820)

**Features:** macOS Compatibility

**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 HIIT Trainer free?

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

### Is Shift free?

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

### Do HIIT Trainer or Shift have ads?

Neither HIIT Trainer nor Shift shows ads.

### Which is updated more often, HIIT Trainer or Shift?

HIIT Trainer ships an update every 2 days, and Shift every 4 days. Most recently, HIIT Trainer was updated on October 10, 2026 and Shift on October 16, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*