# Training121 vs HIIT Timer

The clearest difference is price: Training121 at Free against HIIT Timer's $0.99. Training121 also leads on iOS requirement (15.6 vs 17.5). HIIT Timer's advantage is update cadence (every 2 months vs every 22 months). On ads, in-app purchases and device support there is nothing between them.

Training121 is free to download; HIIT Timer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Training121 ships an update every 22 months, HIIT Timer every 2 months. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Training121 | HIIT Timer |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 2 months** |
| Size | 31 MB | 2 MB |
| Requires iOS | **15.6** | 17.5 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Training121](https://appshunter.io/developer/1615986164) | [Peter Lebedev](https://appshunter.io/developer/1760407520) |

## What reviewers say

### Training121

[App page](https://appshunter.io/ios/app/training121/id1615986162)

**Features:** macOS Compatibility

**In-app purchases:** none


### HIIT Timer

[App page](https://appshunter.io/ios/app/hiit-timer-interval-flex/id6596603930)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Training121 free?

Training121 is free to download, with no in-app purchases.

### Is HIIT Timer free?

HIIT Timer costs $0.99, with no in-app purchases.

### Do Training121 or HIIT Timer have ads?

Neither Training121 nor HIIT Timer shows ads.

### Which is updated more often, Training121 or HIIT Timer?

Training121 ships an update every 22 months, and HIIT Timer every 2 months. Most recently, Training121 was updated on October 8, 2026 and HIIT Timer on October 9, 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.*