# Hydra Trainer vs ASVAB Prep

The clearest difference is in-app purchases: Hydra Trainer at none against ASVAB Prep's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ASVAB Prep sells 3 in-app purchases, starting at $3.99 per 7 days. Hydra Trainer asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Hydra Trainer | ASVAB Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/asvab-prep-practice-test/id6762491131/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 39 MB | 40 MB |
| Requires iOS | 18.5 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Midnite Compile GmbH](https://appshunter.io/developer/1850145762) | [Can Devecioglu](https://appshunter.io/developer/1727949528) |

## What reviewers say

### 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


### ASVAB Prep

[App page](https://appshunter.io/ios/app/asvab-prep-practice-test/id6762491131)

Prepare for international military aptitude tests with realistic simulations and detailed feedback. Train cognitive, numerical, verbal, and spatial reasoning skills with a comprehensive module library. Track your progress and improve speed and accuracy for exam success.

**Highlights:** Realistic exam timing, Adaptive difficulty, Step-by-step explanations, Progress tracking, Full exam simulation, Offline access, Comprehensive module library

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Monthly | $8.99 | per month |
| Lifetime | $8.99 | one-time |


## Frequently asked questions

### Is Hydra Trainer free?

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

### Is ASVAB Prep free?

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

### Do Hydra Trainer or ASVAB Prep have ads?

Neither Hydra Trainer nor ASVAB Prep shows ads.

### Which is updated more often, Hydra Trainer or ASVAB Prep?

Hydra Trainer ships an update weekly, and ASVAB Prep weekly. Most recently, Hydra Trainer was updated on October 7, 2026 and ASVAB Prep 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.*