# syn9 — Share schedules and notes

> Share schedules and notes (iPhone/iPad app by Tomohiro Sekikawa.)

- Source: https://appshunter.io/ios/app/syn9/id6449186616 (this page in markdown: same URL + `.md`)
- Developer: [Tomohiro Sekikawa](https://appshunter.io/developer/1670259539)
- Category: Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 79 MB
- Languages: English, Japanese
- Released: 2023-05-25
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/syn9/id6449186616/reviews.md

## What is syn9?

An app to share schedules and notes. You can choose who you want to share each schedule or memo with. Of course, you can also use it for yourself. Group chat is also possible, so you can check the contents smoothly!

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| 年額プラン | $12.99 | per year |
| 月額プラン | $1.99 | per month |



## Version history (last 5 releases)

### 2.6.1 — 2023-07-12

・Add cache to chat
・Add cache to past schedule
・Fixed an error in schedule selection

### 2.6 — 2023-07-10

・Add permission for ID search
・Fixed the block function
・Add all read function
・Added memo folder order function

### 2.5 — 2023-07-05

・Added chat reaction function
・Improved memory consumption
・Fixed the day of the week display on the calendar

### 2.4 — 2023-06-28

・Fixed notification badge update
・Fixed emoji input error
・Changed chat page UI

### 2.3 — 2023-06-22

・Update notification function

## More apps by Tomohiro Sekikawa

- [hitoma-note](https://appshunter.io/ios/app/hitoma-note/id1670259537)

All apps by Tomohiro Sekikawa: https://appshunter.io/developer/1670259539

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-19.*