# COPROG Calendar vs Only Calendar

The clearest difference is in-app purchases: COPROG Calendar at none against Only Calendar's 1. COPROG Calendar also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Only Calendar sells 1 one-off in-app purchase. COPROG Calendar asks for nothing beyond the download.

## The numbers

| Metric | COPROG Calendar | Only Calendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 63 MB | 3 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [COPROG e.K.](https://appshunter.io/developer/1356957127) | [Lizzian LLC](https://appshunter.io/developer/1895095832) |

## What reviewers say

### COPROG Calendar

[App page](https://appshunter.io/ios/app/coprog-calendar/id6670216681)

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

**In-app purchases:** none


### Only Calendar

[App page](https://appshunter.io/ios/app/only-calendar/id6772754764)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Only Calendar Pro | $5.99 | one-time |


## Frequently asked questions

### Is COPROG Calendar free?

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

### Is Only Calendar free?

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

### Do COPROG Calendar or Only Calendar have ads?

Neither COPROG Calendar nor Only Calendar shows ads.

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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.*