# Mersea  メルシー vs Shiro

The clearest difference is review sentiment: Shiro at 100% against Mersea  メルシー's 29%. Shiro also leads on update cadence (weekly vs every 6 weeks). Mersea  メルシー's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Mersea  メルシー ships an update every 6 weeks, Shiro weekly. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Mersea  メルシー | Shiro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 28.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 89 MB | 35 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Womens Kampo Inc.](https://appshunter.io/developer/1220678073) | [yohaku株式会社](https://appshunter.io/developer/1868149580) |

## What reviewers say

### Mersea  メルシー

[App page](https://appshunter.io/ios/app/mersea/id1220678074)

This app offers personalized advice for creating a body more conducive to pregnancy, based on individual constitution. It provides support for the physical and emotional anxieties of those trying to conceive, with guidance on diet, exercise, sleep, and mental well-being.

**Highlights:** Personalized constitution analysis, Pregnancy-ready body advice, Diet, exercise, sleep, and mental care tips, Basal body temperature tracking, HealthKit integration for temperature data

**Features:** macOS Compatibility

**In-app purchases:** none


### Shiro

[App page](https://appshunter.io/ios/app/shiro/id6757661846)

This app offers a supportive space for self-care through AI-powered conversations, journaling, and mindfulness exercises. It helps users understand and articulate their emotions, build self-awareness, and establish healthy mental routines. Features include personalized AI interactions, mood tracking, and cognitive behavioral therapy-based tools.

**Highlights:** AI-powered conversations, Personalized AI customization, Journaling with voice input, Cognitive behavioral therapy tools, Guided meditation and breathing exercises, Mood check-ins and reflection reports

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

**In-app purchases:** none


## Frequently asked questions

### Is Mersea  メルシー free?

Mersea  メルシー is free to download, with no in-app purchases.

### Is Shiro free?

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

### Do Mersea  メルシー or Shiro have ads?

Shiro shows ads; Mersea  メルシー does not.

### Which is updated more often, Mersea  メルシー or Shiro?

Mersea  メルシー ships an update every 6 weeks, and Shiro weekly. Most recently, Mersea  メルシー was updated on November 6, 2026 and Shiro on October 31, 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.*