# Mark Things vs HIIT Trainer

The clearest difference is in-app purchases: HIIT Trainer at none against Mark Things's 1. HIIT Trainer also leads on update cadence (every 2 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Mark Things sells 1 one-off in-app purchase. HIIT Trainer asks for nothing beyond the download.

Mark Things ships an update fortnightly, HIIT Trainer every 2 days. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Mark Things | HIIT Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Size | 162 MB | 14 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [名 陈](https://appshunter.io/developer/1848363690) | [巧 唐](https://appshunter.io/developer/6790363579) |

## What reviewers say

### Mark Things

[App page](https://appshunter.io/ios/app/mark-things-tally-counter/id6758269471)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One-time Purchase | $1.99 | one-time |


### HIIT Trainer

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mark Things free?

Mark Things is free to download, with in-app purchases available.

### Is HIIT Trainer free?

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

### Do Mark Things or HIIT Trainer have ads?

Neither Mark Things nor HIIT Trainer shows ads.

### Which is updated more often, Mark Things or HIIT Trainer?

Mark Things ships an update fortnightly, and HIIT Trainer every 2 days. Most recently, Mark Things was updated on October 6, 2026 and HIIT Trainer on October 10, 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.*