# Itonamy vs GapSync（ギャップシンク）/ 相性よりズレを知ろう

The clearest difference is in-app purchases: Itonamy at none against GapSync（ギャップシンク）/ 相性よりズレを知ろう's 1. GapSync（ギャップシンク）/ 相性よりズレを知ろう's advantage is update cadence (every 2 weeks vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. GapSync（ギャップシンク）/ 相性よりズレを知ろう sells 1 one-off in-app purchase. Itonamy asks for nothing beyond the download.

Itonamy ships an update every 6 weeks, GapSync（ギャップシンク）/ 相性よりズレを知ろう every 2 weeks. The most recent releases landed on October 8, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Itonamy | GapSync（ギャップシンク）/ 相性よりズレを知ろう |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 80 MB | 7 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [MCG Dev.](https://appshunter.io/developer/1891583353) | [ダウネットワーク株式会社](https://appshunter.io/developer/1845498423) |

## What reviewers say

### Itonamy

[App page](https://appshunter.io/ios/app/itonamy/id6763347163)

**In-app purchases:** none


### GapSync（ギャップシンク）/ 相性よりズレを知ろう

[App page](https://appshunter.io/ios/app/gapsync/id6775158660)

This app helps you visualize the differences in values and lifestyles between you and another person. It's designed to foster understanding by highlighting discrepancies, rather than judging compatibility. Create shared questionnaires and receive reports with insights for discussion.

**Highlights:** Create relationship-specific diagnostic rooms, Respond via web browser (no app install needed for partner), Answer questions about values and lifestyle, View gap reports visualizing differences, Receive hints for constructive discussion, Save and review past reports

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告削除 | $1.99 | one-time |


## Frequently asked questions

### Is Itonamy free?

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

### Is GapSync（ギャップシンク）/ 相性よりズレを知ろう free?

GapSync（ギャップシンク）/ 相性よりズレを知ろう is free to download, with in-app purchases available.

### Do Itonamy or GapSync（ギャップシンク）/ 相性よりズレを知ろう have ads?

Both Itonamy and GapSync（ギャップシンク）/ 相性よりズレを知ろう show ads.

### Which is updated more often, Itonamy or GapSync（ギャップシンク）/ 相性よりズレを知ろう?

Itonamy ships an update every 6 weeks, and GapSync（ギャップシンク）/ 相性よりズレを知ろう every 2 weeks. Most recently, Itonamy was updated on October 8, 2026 and GapSync（ギャップシンク）/ 相性よりズレを知ろう on October 13, 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.*