# notyz vs Calden

The clearest difference is update cadence: notyz at every 4 months against Calden's every 39 months. notyz also leads on iOS requirement (12.0 vs 15.0). 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.

notyz ships an update every 4 months, Calden every 39 months. Both last shipped on September 7, 2026.

## The numbers

| Metric | notyz | Calden |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 39 months |
| Size | 1 MB | 12 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Apps for Cities B.V.](https://appshunter.io/developer/1330615229) | [apicodo GmbH](https://appshunter.io/developer/1169099711) |

## What reviewers say

### notyz

[App page](https://appshunter.io/ios/app/notyz/id1443057132)

**In-app purchases:** none


### Calden

[App page](https://appshunter.io/ios/app/calden/id6450459991)

**In-app purchases:** none


## Frequently asked questions

### Is notyz free?

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

### Is Calden free?

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

### Do notyz or Calden have ads?

Neither notyz nor Calden shows ads.

### Which is updated more often, notyz or Calden?

notyz ships an update every 4 months, and Calden every 39 months. Most recently, notyz was updated on September 7, 2026 and Calden on September 7, 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.*