# Üben vs Hidden Codes

The clearest difference is review sentiment: Hidden Codes at 47% against Üben's 0%. Hidden Codes also leads on price (Free vs $0.99) and update cadence (every 2 months vs every 29 months). Üben's advantage is iOS requirement (12.0 vs 14.0). On ads, in-app purchases and device support there is nothing between them.

Hidden Codes is free to download; Üben costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Üben ships an update every 29 months, Hidden Codes every 2 months. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Üben | Hidden Codes |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/hidden-codes/id1556450569/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | **47.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 21 MB | 202 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [admaDIC Rainer Schwarze & Annett Schwarze GbR](https://appshunter.io/developer/553282875) | [Meron Mendel](https://appshunter.io/developer/1556435681) |

## What reviewers say

### Üben

[App page](https://appshunter.io/ios/app/uben-rounding/id979387759)

Practice rounding numbers between 1 and 1,000,000 with this straightforward educational tool. Its simple design makes it ideal for children to easily grasp and practice mathematical concepts.

**Highlights:** Number rounding practice, Numbers up to 1,000,000, Simple and easy to use, Random task generation, Ideal for children

**Features:** Vision Pro support

**In-app purchases:** none


### Hidden Codes

[App page](https://appshunter.io/ios/app/hidden-codes/id1556450569)

This educational game simulates a social media environment to teach young people about online radicalization. Players learn to identify problematic content and understand how extremist groups use digital media. It addresses topics like political codes, conspiracy myths, and how to respond to radicalization in one's social circle.

**Highlights:** Simulated social media environment, Identify problematic content, Understand extremist online tactics, Learn about political codes and myths, Guidance on responding to radicalization

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

**In-app purchases:** none


## Frequently asked questions

### Is Üben free?

Üben costs $0.99, with no in-app purchases.

### Is Hidden Codes free?

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

### Do Üben or Hidden Codes have ads?

Neither Üben nor Hidden Codes shows ads.

### Which is updated more often, Üben or Hidden Codes?

Üben ships an update every 29 months, and Hidden Codes every 2 months. Most recently, Üben was updated on September 21, 2026 and Hidden Codes on September 22, 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.*