# Tabata & HIIT Interval Timer vs 妊活バイオハック

The clearest difference is in-app purchases: Tabata & HIIT Interval Timer at none against 妊活バイオハック's 2. Tabata & HIIT Interval Timer also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). 妊活バイオハック's advantage is ads (none vs shown) and update cadence (every 3 days vs every 4 months). On price there is nothing between them.

Both are free to download. 妊活バイオハック sells 2 in-app purchases, starting at $5.99 per month. Tabata & HIIT Interval Timer asks for nothing beyond the download.

Tabata & HIIT Interval Timer ships an update every 4 months, 妊活バイオハック every 3 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Tabata & HIIT Interval Timer | 妊活バイオハック |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (251 ratings)](https://appshunter.io/ios/app/tabata-and-hiit-interval-timer/id1166542235/reviews)** | — |
| Number of ratings | **251** | — |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 48 MB | 2 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Takahiro Torii](https://appshunter.io/developer/1048814905) | [Dev Systems, LLC](https://appshunter.io/developer/1498776718) |

## What reviewers say

### Tabata & HIIT Interval Timer

[App page](https://appshunter.io/ios/app/tabata-and-hiit-interval-timer/id1166542235)

This app functions as a versatile timer for high-intensity interval training (HIIT) and Tabata workouts. It guides users through structured exercise and rest periods, making it easy to follow popular interval training methods for effective, short-duration fitness sessions.

**Highlights:** Tabata timer, Interval timer, HIIT workout guidance, Structured exercise/rest periods, Customizable training

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

**In-app purchases:** none


### 妊活バイオハック

[App page](https://appshunter.io/ios/app/id6761880242)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月額プレミアム | $5.99 | per month |
| 年間プレミアム | $19.99 | per year |


## Frequently asked questions

### Is Tabata & HIIT Interval Timer free?

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

### Is 妊活バイオハック free?

妊活バイオハック is free to download, with in-app purchases available.

### Do Tabata & HIIT Interval Timer or 妊活バイオハック have ads?

Tabata & HIIT Interval Timer shows ads; 妊活バイオハック does not.

### Which is updated more often, Tabata & HIIT Interval Timer or 妊活バイオハック?

Tabata & HIIT Interval Timer ships an update every 4 months, and 妊活バイオハック every 3 days. Most recently, Tabata & HIIT Interval Timer was updated on November 6, 2026 and 妊活バイオハック on October 31, 2026.

---

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