# Deen Guide vs Brain Preflight

The clearest difference is in-app purchases: Deen Guide at none against Brain Preflight's 2. Deen Guide also leads on ads (none vs shown). Brain Preflight's advantage is update cadence (every 2 days vs every 6 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Brain Preflight sells 2 in-app purchases, starting at $6.99 per month. Deen Guide asks for nothing beyond the download.

Deen Guide ships an update every 6 weeks, Brain Preflight every 2 days. The most recent releases landed on October 21, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Deen Guide | Brain Preflight |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/brain-preflight-aptitude-test/id6794363864/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 51 MB | 13 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZERO HORIZON LTD](https://appshunter.io/developer/1879018583) | [Amine Kara](https://appshunter.io/developer/6794363986) |

## What reviewers say

### Deen Guide

[App page](https://appshunter.io/ios/app/deen-guide/id6759538369)

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

**In-app purchases:** none


### Brain Preflight

[App page](https://appshunter.io/ios/app/brain-preflight-aptitude-test/id6794363864)

Engage in daily brain training with exercises mirroring pilot aptitude tests. Improve memory, logic, spatial reasoning, and multitasking skills. Prepare for aviation selections with tailored programs and mock exams.

**Highlights:** Pilot aptitude test exercises, Memory, logic, spatial, multitasking training, Tailored selection preparation programs, Full mock exams under real conditions, Cognitive diagnostic tools, 100% offline functionality, Aviation English and culture knowledge

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $6.99 | per month |
| Premium Yearly | $39.99 | per year |


## Frequently asked questions

### Is Deen Guide free?

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

### Is Brain Preflight free?

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

### Do Deen Guide or Brain Preflight have ads?

Brain Preflight shows ads; Deen Guide does not.

### Which is updated more often, Deen Guide or Brain Preflight?

Deen Guide ships an update every 6 weeks, and Brain Preflight every 2 days. Most recently, Deen Guide was updated on October 21, 2026 and Brain Preflight on October 19, 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.*