# Workout Timer vs 妊活バイオハック

The clearest difference is in-app purchases: Workout Timer at none against 妊活バイオハック's 2. Workout Timer also leads on iOS requirement (15.0 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 and device support 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. Workout Timer asks for nothing beyond the download.

Workout Timer ships an update every 4 months, 妊活バイオハック every 3 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Workout Timer | 妊活バイオハック |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (558 ratings)](https://appshunter.io/ios/app/workout-timer-hiit-tabata/id1510485545/reviews)** | — |
| Number of ratings | **558** | — |
| Positive reviews | 92.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 13 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Shogo Yoshida](https://appshunter.io/developer/547173926) | [Dev Systems, LLC](https://appshunter.io/developer/1498776718) |

## What reviewers say

### Workout Timer

[App page](https://appshunter.io/ios/app/workout-timer-hiit-tabata/id1510485545)

This versatile timer supports various training styles like HIIT, Tabata, and circuit training. Customize workout and rest intervals to match your preferred pace. It's ideal for gym workouts, home stretching, yoga, and even non-fitness activities.

**Highlights:** Customizable workout and rest intervals, Support for HIIT, Tabata, and circuit training, Simple setup and easy time/round adjustments, Sound and vibration settings, Versatile use for gym, home, and other activities

**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 Workout Timer free?

Workout 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 Workout Timer or 妊活バイオハック have ads?

Workout Timer shows ads; 妊活バイオハック does not.

### Which is updated more often, Workout Timer or 妊活バイオハック?

Workout Timer ships an update every 4 months, and 妊活バイオハック every 3 days. Most recently, Workout Timer was updated on October 30, 2026 and 妊活バイオハック on October 25, 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.*