# Suro vs OK Calendar

The clearest difference is update cadence: Suro at every 4 days against OK Calendar's every 11 days. 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.

Suro ships an update every 4 days, OK Calendar every 11 days. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Suro | OK Calendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 11 days |
| Size | 48 MB | 52 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Roger Clotet](https://appshunter.io/developer/6780486035) | [Nikolaos Pinatsis](https://appshunter.io/developer/1832444446) |

## What reviewers say

### Suro

[App page](https://appshunter.io/ios/app/suro-shared-plans/id6780486033)

**In-app purchases:** none


### OK Calendar

[App page](https://appshunter.io/ios/app/ok-calendar/id6785077515)

**In-app purchases:** none


## Frequently asked questions

### Is Suro free?

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

### Is OK Calendar free?

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

### Do Suro or OK Calendar have ads?

Neither Suro nor OK Calendar shows ads.

### Which is updated more often, Suro or OK Calendar?

Suro ships an update every 4 days, and OK Calendar every 11 days. Most recently, Suro was updated on October 25, 2026 and OK Calendar on October 28, 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.*