# IBUKI vs Workout Comparator

The clearest difference is in-app purchases: IBUKI at none against Workout Comparator's 2. IBUKI also leads on iOS requirement (10.0 vs 15.0). Workout Comparator's advantage is update cadence (monthly vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Workout Comparator sells 2 in-app purchases, starting at $0.99 per month. IBUKI asks for nothing beyond the download.

IBUKI ships an update every 3 months, Workout Comparator monthly. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | IBUKI | Workout Comparator |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | — |
| Size | 18 MB | 2 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [株式会社リキッド・デザイン・システムズ](https://appshunter.io/developer/1259085426) | [Coon Creek Software](https://appshunter.io/developer/590274033) |

## What reviewers say

### IBUKI

[App page](https://appshunter.io/ios/app/ibuki/id1259085427)

This app monitors your estimated respiration rate during sleep using a dedicated body motion sensor. It records data for up to 1000 days and can alert you to potential vital abnormalities. Data syncs with the iPhone Health app.

**Highlights:** Sleep respiration monitoring, Body movement tracking, Vital abnormality alerts, 1000-day data recording, Apple Health integration, Bluetooth sensor connection

**In-app purchases:** none


### Workout Comparator

[App page](https://appshunter.io/ios/app/workout-comparator/id1668582176)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Annual Subscription | $4.99 | per year |


## Frequently asked questions

### Is IBUKI free?

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

### Is Workout Comparator free?

Workout Comparator is free to download, with in-app purchases available.

### Do IBUKI or Workout Comparator have ads?

Neither IBUKI nor Workout Comparator shows ads.

### Which is updated more often, IBUKI or Workout Comparator?

IBUKI ships an update every 3 months, and Workout Comparator monthly. Most recently, IBUKI was updated on October 7, 2026 and Workout Comparator on October 2, 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.*