# Mindcodex vs Hydra Trainer

The clearest difference is update cadence: Hydra Trainer at weekly against Mindcodex's every 4 months. Mindcodex's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.5). On price, 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.

Mindcodex ships an update every 4 months, Hydra Trainer weekly. The most recent releases landed on September 10, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Mindcodex | Hydra Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | — | Free |
| Size | 22 MB | 39 MB |
| Requires iOS | **13.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mind Codex GmbH](https://appshunter.io/developer/1503192489) | [Midnite Compile GmbH](https://appshunter.io/developer/1850145762) |

## What reviewers say

### Mindcodex

[App page](https://appshunter.io/ios/app/mindcodex/id1503192490)

**Features:** macOS Compatibility

**In-app purchases:** none


### Hydra Trainer

[App page](https://appshunter.io/ios/app/hydra-trainer/id6754796903)

This app offers targeted cognitive training for demanding selection processes, including police, special forces, and leadership courses. It features a variety of exercises to improve logical thinking, pattern recognition, memory, and attention, with adaptive difficulty and progress tracking.

**Highlights:** Number sequences and equations, Matrix and pattern recognition, Anagrams and word finding, Pauli-style arithmetic tests, Folding template test, Occluded motion test, Memory test, Stroop, d-Test & Form Focus Test

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mindcodex free?

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

### Is Hydra Trainer free?

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

### Do Mindcodex or Hydra Trainer have ads?

Neither Mindcodex nor Hydra Trainer shows ads.

### Which is updated more often, Mindcodex or Hydra Trainer?

Mindcodex ships an update every 4 months, and Hydra Trainer weekly. Most recently, Mindcodex was updated on September 10, 2026 and Hydra Trainer on September 21, 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.*