# Shared Calendar & Plan | Biske vs Syn9

The clearest difference is ads: Syn9 at none against Shared Calendar & Plan | Biske's shown. Syn9 also leads on update cadence (every 5 days vs every 2 weeks). Shared Calendar & Plan | Biske's advantage is iOS requirement (16.0 vs 18.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Shared Calendar & Plan | Biske sells 2 in-app purchases, starting at $2.99 per month and Syn9 sells 6 in-app purchases, starting at $3.00 per month. Whichever you choose, the download price is not the number that matters.

Shared Calendar & Plan | Biske ships an update every 2 weeks, Syn9 every 5 days. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Shared Calendar & Plan | Biske | Syn9 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (7 ratings)](https://appshunter.io/ios/app/shared-calendar-and-plan-biske/id6747784774/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 72.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 128 MB | 57 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shibapp LLC](https://appshunter.io/developer/852300851) | [Tomohiro Sekikawa](https://appshunter.io/developer/1670259539) |

## What reviewers say

### Shared Calendar & Plan | Biske

[App page](https://appshunter.io/ios/app/shared-calendar-and-plan-biske/id6747784774)

Organize your life with a beautifully designed calendar and notes app. Share schedules with loved ones or manage your personal plans with intuitive features and customizable themes. Enjoy a clean, simple layout with powerful organization tools.

**Highlights:** Multiple calendar creation, Calendar sharing and syncing, Notes with checklists and photos, Event history and templates, Customizable themes and fonts, Passcode privacy lock, Drag and drop event management

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Biske Premium Plan | $2.99 | per month |
| Biske Premium (1 year) | $29.99 | per year |


### Syn9

[App page](https://appshunter.io/ios/app/syn9/id6758545066)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus | $3.00 | per month |
| Max | $6.99 | per month |
| Plus annual | $29.00 | per year |
| Light size | $1.99 | one-time |
| Regular size | $3.99 | one-time |
| Generous size | $7.99 | one-time |


## Frequently asked questions

### Is Shared Calendar & Plan | Biske free?

Shared Calendar & Plan | Biske is free to download, with in-app purchases available.

### Is Syn9 free?

Syn9 is free to download, with in-app purchases available.

### Do Shared Calendar & Plan | Biske or Syn9 have ads?

Shared Calendar & Plan | Biske shows ads; Syn9 does not.

### Which is updated more often, Shared Calendar & Plan | Biske or Syn9?

Shared Calendar & Plan | Biske ships an update every 2 weeks, and Syn9 every 5 days. Most recently, Shared Calendar & Plan | Biske was updated on November 8, 2026 and Syn9 on November 9, 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.*