# ZumNum vs Klug

The clearest difference is in-app purchases: ZumNum at none against Klug's 5. Klug's advantage is update cadence (every 2 days vs every 12 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Klug sells 5 in-app purchases, starting at $4.99 per month. ZumNum asks for nothing beyond the download.

ZumNum ships an update every 12 months, Klug every 2 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ZumNum | Klug |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 132 MB | 19 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Reza Bina](https://appshunter.io/developer/1725164522) | [can ozel](https://appshunter.io/developer/1888975282) |

## What reviewers say

### ZumNum

[App page](https://appshunter.io/ios/app/zumnum/id6748617262)

Master German numbers through listening and typing exercises. This ad-free app offers focused practice for expats, students, or any curious learner. Enjoy a clean design and offline functionality for convenient learning anywhere.

**Highlights:** Learn German numbers, Listening comprehension exercises, Typing practice, Instant feedback, Ad-free experience, Offline functionality

**In-app purchases:** none


### Klug

[App page](https://appshunter.io/ios/app/klug-learn-german/id6761336254)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $4.99 | per month |
| Yearly Plan | $29.99 | per year |
| 1000 Credits | $2.99 | one-time |
| 4,000 Credits | $9.99 | one-time |
| 10,000 Credits | $19.99 | one-time |


## Frequently asked questions

### Is ZumNum free?

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

### Is Klug free?

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

### Do ZumNum or Klug have ads?

Neither ZumNum nor Klug shows ads.

### Which is updated more often, ZumNum or Klug?

ZumNum ships an update every 12 months, and Klug every 2 days. Most recently, ZumNum was updated on October 30, 2026 and Klug on November 5, 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.*