# Willysm（ウィリズム） vs Bowel Habit Diary

The clearest difference is price: Willysm（ウィリズム） at Free against Bowel Habit Diary's $1.99. Willysm（ウィリズム） also leads on iOS requirement (13.0 vs 17.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

Willysm（ウィリズム） is free to download; Bowel Habit Diary costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Willysm（ウィリズム） ships an update every 2 months, Bowel Habit Diary every 6 weeks. The most recent releases landed on October 5, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Willysm（ウィリズム） | Bowel Habit Diary |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[4.8 (4 ratings)](https://appshunter.io/ios/app/bowel-habit-diary/id1542441515/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 69.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | — | Paid |
| Size | 13 MB | 10 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [サイオステクノロジー株式会社](https://appshunter.io/developer/1465052137) | [Shinya Taguchi](https://appshunter.io/developer/1513094701) |

## What reviewers say

### Willysm（ウィリズム）

[App page](https://appshunter.io/ios/app/willysm/id1259705187)

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

**In-app purchases:** none


### Bowel Habit Diary

[App page](https://appshunter.io/ios/app/bowel-habit-diary/id1542441515)

Track your bowel movements and related health data. Log frequency, consistency, and medication intake. Analyze trends with graphs and protect your sensitive information with biometric security.

**Highlights:** Log bowel movement frequency and interval, Record stool consistency and color, Track medication intake, View history in calendar and list formats, Analyze data with graphs, Biometric security (Touch ID/Face ID), iCloud sync across Apple devices

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Willysm（ウィリズム） free?

Willysm（ウィリズム） is free to download, with no in-app purchases.

### Is Bowel Habit Diary free?

Bowel Habit Diary costs $1.99, with no in-app purchases.

### Do Willysm（ウィリズム） or Bowel Habit Diary have ads?

Neither Willysm（ウィリズム） nor Bowel Habit Diary shows ads.

### Which is updated more often, Willysm（ウィリズム） or Bowel Habit Diary?

Willysm（ウィリズム） ships an update every 2 months, and Bowel Habit Diary every 6 weeks. Most recently, Willysm（ウィリズム） was updated on October 5, 2026 and Bowel Habit Diary on October 27, 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.*