# CZSO vs HappKa

The clearest difference is device support: CZSO at 3 against HappKa's 1. CZSO also leads on iOS requirement (13.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 18, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | CZSO | HappKa |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Size | 8 MB | 43 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Cesky statisticky urad](https://appshunter.io/developer/805764166) | [E-invent s.r.o.](https://appshunter.io/developer/570183245) |

## What reviewers say

### CZSO

[App page](https://appshunter.io/ios/app/czso/id1604362113)

**Features:** macOS Compatibility

**In-app purchases:** none


### HappKa

[App page](https://appshunter.io/ios/app/happka/id6502683359)

**In-app purchases:** none


## Frequently asked questions

### Is CZSO free?

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

### Is HappKa free?

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

### Do CZSO or HappKa have ads?

Neither CZSO nor HappKa shows ads.

### Which is updated more often, CZSO or HappKa?

CZSO ships an update monthly, and HappKa monthly. Most recently, CZSO was updated on September 18, 2026 and HappKa on September 20, 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.*