# HIIT Timer vs Astrel：ケガ予防×コンディション管理

The clearest difference is in-app purchases: HIIT Timer at none against Astrel：ケガ予防×コンディション管理's 2. HIIT Timer also leads on iOS requirement (15.2 vs 18.5). Astrel：ケガ予防×コンディション管理's advantage is update cadence (every 2 weeks vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. Astrel：ケガ予防×コンディション管理 sells 2 in-app purchases, starting at $0.99 per 7 days. HIIT Timer asks for nothing beyond the download.

HIIT Timer ships an update every 5 months, Astrel：ケガ予防×コンディション管理 every 2 weeks. The most recent releases landed on September 19, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | HIIT Timer | Astrel：ケガ予防×コンディション管理 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Size | 9 MB | 88 MB |
| Requires iOS | **15.2** | 18.5 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [masaaki genno](https://appshunter.io/developer/1611455396) | [Tensho Yashiro](https://appshunter.io/developer/1850230279) |

## What reviewers say

### HIIT Timer

[App page](https://appshunter.io/ios/app/hiit-timer-hiit/id1611455394)

**Features:** macOS Compatibility

**In-app purchases:** none


### Astrel：ケガ予防×コンディション管理

[App page](https://appshunter.io/ios/app/astrel/id6755174672)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| トレーニングモードPro(1週間) | $0.99 | per 7 days |
| トレーニングモード(1ヶ月) | $3.99 | per month |


## Frequently asked questions

### Is HIIT Timer free?

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

### Is Astrel：ケガ予防×コンディション管理 free?

Astrel：ケガ予防×コンディション管理 is free to download, with in-app purchases available.

### Do HIIT Timer or Astrel：ケガ予防×コンディション管理 have ads?

Both HIIT Timer and Astrel：ケガ予防×コンディション管理 show ads.

### Which is updated more often, HIIT Timer or Astrel：ケガ予防×コンディション管理?

HIIT Timer ships an update every 5 months, and Astrel：ケガ予防×コンディション管理 every 2 weeks. Most recently, HIIT Timer was updated on September 19, 2026 and Astrel：ケガ予防×コンディション管理 on September 14, 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.*