# LinkDays vs Syn9

The clearest difference is ads: Syn9 at none against LinkDays's shown. Syn9 also leads on update cadence (every 5 days vs every 3 weeks). LinkDays's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 18.0). On price and in-app purchases there is nothing between them.

Both are free to download. LinkDays sells 2 in-app purchases, starting at $1.99 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.

LinkDays ships an update every 3 weeks, Syn9 every 5 days. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | LinkDays | Syn9 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (25 ratings)](https://appshunter.io/ios/app/linkdays-calendar-sharing-app/id6478069044/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 43 MB | 57 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Akito Nishiyama](https://appshunter.io/developer/1731644746) | [Tomohiro Sekikawa](https://appshunter.io/developer/1670259539) |

## What reviewers say

### LinkDays

[App page](https://appshunter.io/ios/app/linkdays-calendar-sharing-app/id6478069044)

Simplify your daily schedule management with an intuitive calendar app. Easily share events with family and friends, customize your view, and organize your time with flexible recurring event settings and schedule categorization.

**Highlights:** Intuitive and user-friendly design, Easy calendar sharing with family and friends, Vertical calendar display option, Customizable week start day, Schedule categorization with color coding, Flexible recurring event settings, Dark mode compatibility

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $1.99 | per month |
| Yearly Plan | $19.99 | 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 LinkDays free?

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

### Is Syn9 free?

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

### Do LinkDays or Syn9 have ads?

LinkDays shows ads; Syn9 does not.

### Which is updated more often, LinkDays or Syn9?

LinkDays ships an update every 3 weeks, and Syn9 every 5 days. Most recently, LinkDays was updated on October 30, 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.*