# Lyn vs Army Officer Selection Prep

The clearest difference is update cadence: Lyn at every 3 weeks against Army Officer Selection Prep's every 2 months. Lyn also leads on iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Lyn sells 3 in-app purchases, starting at $4.99 per month and Army Officer Selection Prep sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Lyn ships an update every 3 weeks, Army Officer Selection Prep every 2 months. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Lyn | Army Officer Selection Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/lyn-ai-tutor-and-study-help/id6740411879/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 90 MB | 6 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thuemmler AI GmbH](https://appshunter.io/developer/1772217985) | [MD Shahariar Nazim Joy](https://appshunter.io/developer/1893961943) |

## What reviewers say

### Lyn

[App page](https://appshunter.io/ios/app/lyn-ai-tutor-and-study-help/id6740411879)

This AI-powered tutor provides instant help with school subjects, homework, and exam preparation. It offers step-by-step explanations, transforms study materials into flashcards, and includes a voice mentor for interactive learning.

**Highlights:** AI tutor for all school subjects, Homework assistance and explanation, Convert study materials to flashcards, Voice mentor and language practice, Spaced repetition flashcards, Personalized learning projects

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nachhilfe Mentor Pro | $4.99 | per month |
| Nachhilfe Mentor Pro | $6.99 | per month |
| Nachhilfe Mentor Pro | $49.99 | per year |


### Army Officer Selection Prep

[App page](https://appshunter.io/ios/app/army-officer-selection-prep/id6793860549)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $6.99 | per month |
| Yearly Premium | $19.99 | per year |
| Lifetime Access | $29.99 | one-time |


## Frequently asked questions

### Is Lyn free?

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

### Is Army Officer Selection Prep free?

Army Officer Selection Prep is free to download, with in-app purchases available.

### Do Lyn or Army Officer Selection Prep have ads?

Neither Lyn nor Army Officer Selection Prep shows ads.

### Which is updated more often, Lyn or Army Officer Selection Prep?

Lyn ships an update every 3 weeks, and Army Officer Selection Prep every 2 months. Most recently, Lyn was updated on October 24, 2026 and Army Officer Selection Prep on October 17, 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.*