# Calla　公式アプリ vs MiroSync

The clearest difference is in-app purchases: Calla　公式アプリ at none against MiroSync's 9. Calla　公式アプリ also leads on iOS requirement (12.0 vs 15.0). MiroSync's advantage is update cadence (every 8 days vs every 38 months). On price, ads and device support there is nothing between them.

Both are free to download. MiroSync sells 9 in-app purchases, starting at $2.99 per month. Calla　公式アプリ asks for nothing beyond the download.

Calla　公式アプリ ships an update every 38 months, MiroSync every 8 days. The most recent releases landed on September 14, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Calla　公式アプリ | MiroSync |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 81.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 28 MB | 94 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TAKAHIRO MORITA](https://appshunter.io/developer/1655266317) | [株式会社ミロス・インスティチュート](https://appshunter.io/developer/1838881572) |

## What reviewers say

### Calla　公式アプリ

[App page](https://appshunter.io/ios/app/calla/id6444546781)

**In-app purchases:** none


### MiroSync

[App page](https://appshunter.io/ios/app/mirosync-ai-self-discovery/id6752321445)

Engage in supportive dialogue with an AI to organize your thoughts and emotions. This mental self-care tool helps you understand yourself deeper through gentle questions and prompts, offering a private space for reflection anytime.

**Highlights:** AI-guided self-reflection, Organize thoughts and emotions, 24/7 AI support, Private dialogue space, Patented mental balancing system, Trusted by over 120,000 users

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Light Plan | $2.99 | per month |
| Standard Plan | $14.99 | per month |
| Standard Plan | $14.99 | per month |
| Pro Plan | $34.99 | per month |
| Pro Plan | $34.99 | per month |
| Pro Plan | $34.99 | per month |
| Pro Plan | $34.99 | per month |
| Pro Plan | $34.99 | per month |
| Premium Plan | $79.99 | per month |


## Frequently asked questions

### Is Calla　公式アプリ free?

Calla　公式アプリ is free to download, with no in-app purchases.

### Is MiroSync free?

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

### Do Calla　公式アプリ or MiroSync have ads?

Neither Calla　公式アプリ nor MiroSync shows ads.

### Which is updated more often, Calla　公式アプリ or MiroSync?

Calla　公式アプリ ships an update every 38 months, and MiroSync every 8 days. Most recently, Calla　公式アプリ was updated on September 14, 2026 and MiroSync on October 28, 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.*