# Bubble Learning vs KGNAD

The clearest difference is in-app purchases: KGNAD at none against Bubble Learning's 2. KGNAD also leads on ads (none vs shown). Bubble Learning's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price and update cadence there is nothing between them.

Both are free to download. Bubble Learning sells 2 in-app purchases, starting at $24.99 per year. KGNAD asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Bubble Learning | KGNAD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Size | 247 MB | 399 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [STEFANO NINNO](https://appshunter.io/developer/1841575710) | [Joao Filipe Serôdio Josézinho](https://appshunter.io/developer/587880560) |

## What reviewers say

### Bubble Learning

[App page](https://appshunter.io/ios/app/bubble-learning/id6752887938)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AnnualSubscription | $24.99 | per year |
| IncreaseClicks | $0.99 | one-time |


### KGNAD

[App page](https://appshunter.io/ios/app/kgnad-study-german-cases/id6789732366)

**In-app purchases:** none


## Frequently asked questions

### Is Bubble Learning free?

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

### Is KGNAD free?

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

### Do Bubble Learning or KGNAD have ads?

Bubble Learning shows ads; KGNAD does not.

### Which is updated more often, Bubble Learning or KGNAD?

Bubble Learning ships an update every 2 weeks, and KGNAD every 2 weeks. Most recently, Bubble Learning was updated on October 14, 2026 and KGNAD on October 15, 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.*