# Calendar Sync App vs Pro Boost

The clearest difference is update cadence: Pro Boost at every 5 weeks against Calendar Sync App's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calendar Sync App ships an update every 4 months, Pro Boost every 5 weeks. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Calendar Sync App | Pro Boost |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Size | 201 MB | 85 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [CiraApps Limited](https://appshunter.io/developer/1187220064) | [ECU=SHOP](https://appshunter.io/developer/1389703440) |

## What reviewers say

### Calendar Sync App

[App page](https://appshunter.io/ios/app/calendar-sync-app-view-and-edit/id1665590174)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pro Boost

[App page](https://appshunter.io/ios/app/pro-boost/id6738854721)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calendar Sync App free?

Calendar Sync App is free to download, with no in-app purchases.

### Is Pro Boost free?

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

### Do Calendar Sync App or Pro Boost have ads?

Neither Calendar Sync App nor Pro Boost shows ads.

### Which is updated more often, Calendar Sync App or Pro Boost?

Calendar Sync App ships an update every 4 months, and Pro Boost every 5 weeks. Most recently, Calendar Sync App was updated on October 3, 2026 and Pro Boost on October 5, 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.*