# PreventAge vs РКО Календарь

The clearest difference is update cadence: РКО Календарь at every 4 days against PreventAge's every 9 days. PreventAge's advantage is iOS requirement (15.1 vs 17.0). 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.

PreventAge ships an update every 9 days, РКО Календарь every 4 days. The most recent releases landed on November 5, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | PreventAge | РКО Календарь |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 4 days** |
| Size | 36 MB | 6 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [PreventAge](https://appshunter.io/developer/1895339968) | [Vladislav Meriin](https://appshunter.io/developer/6772005489) |

## What reviewers say

### PreventAge

[App page](https://appshunter.io/ios/app/preventage/id6763492388)

**In-app purchases:** none


### РКО Календарь

[App page](https://appshunter.io/ios/app/id6785678289)

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

**In-app purchases:** none


## Frequently asked questions

### Is PreventAge free?

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

### Is РКО Календарь free?

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

### Do PreventAge or РКО Календарь have ads?

Neither PreventAge nor РКО Календарь shows ads.

### Which is updated more often, PreventAge or РКО Календарь?

PreventAge ships an update every 9 days, and РКО Календарь every 4 days. Most recently, PreventAge was updated on November 5, 2026 and РКО Календарь 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.*