# Prepware ATP vs ADF + RMI Trainer

The clearest difference is price: ADF + RMI Trainer at Free against Prepware ATP's $9.99. ADF + RMI Trainer also leads on rating (4.9 vs 2.8) and review sentiment (71% vs 39%). Prepware ATP's advantage is iOS requirement (15.0 vs 18.6). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

ADF + RMI Trainer is free to download; Prepware ATP costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ADF + RMI Trainer holds the better App Store score, 4.9 against 2.8. That said, the two scores are not equally well evidenced: ADF + RMI Trainer has 110 ratings behind it against 20, so its average is the more settled of the two. Written reviews point the same way: 39% of Prepware ATP's written reviews are positive against 71% of ADF + RMI Trainer's.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on November 1, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Prepware ATP | ADF + RMI Trainer |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [2.8 (20 ratings)](https://appshunter.io/ios/app/prepware-atp/id338890846/reviews) | **[4.9 (110 ratings)](https://appshunter.io/ios/app/adf-plus-rmi-trainer-ifr-pilot/id674942534/reviews)** |
| Number of ratings | 20 | **110** |
| Positive reviews | 39.2% of reviews | **71.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Free | Free |
| Size | 44 MB | 152 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ASA](https://appshunter.io/developer/334278379) | [Flygo-Aviation Ltd](https://appshunter.io/developer/550770776) |

## What reviewers say

### Prepware ATP

[App page](https://appshunter.io/ios/app/prepware-atp/id338890846)

Prepare for the FAA Knowledge Exam with this comprehensive study and test tool. It offers flashcard-style review of questions, answers, and explanations, allowing you to study by subject or take realistic practice tests.

**Highlights:** Flashcard-style review, Question, answer, and explanation database, Study by subject, Practice test mode, FAA Knowledge Exam preparation

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

**In-app purchases:** none


### ADF + RMI Trainer

[App page](https://appshunter.io/ios/app/adf-plus-rmi-trainer-ifr-pilot/id674942534)

This app provides interactive lessons and simulations for instrument flight students and instructors to master ADF and RMI radio navigation skills. It helps users learn to read indications, track bearings, and apply IFR procedures with confidence through step-by-step guidance and instant feedback.

**Highlights:** Interactive lessons for core skills, IFR exercises for practical application, ADF/RMI simulator, Step-by-step guidance, Instant feedback

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Prepware ATP free?

Prepware ATP costs $9.99, with no in-app purchases.

### Is ADF + RMI Trainer free?

ADF + RMI Trainer is free to download, with no in-app purchases.

### Which has better reviews, Prepware ATP or ADF + RMI Trainer?

ADF + RMI Trainer is rated higher. Prepware ATP averages 2.8 out of 5 from 20 ratings, while ADF + RMI Trainer averages 4.9 from 110 ratings.

### Do Prepware ATP or ADF + RMI Trainer have ads?

Neither Prepware ATP nor ADF + RMI Trainer shows ads.

### Which is updated more often, Prepware ATP or ADF + RMI Trainer?

Prepware ATP ships an update every 4 months, and ADF + RMI Trainer every 4 months. Most recently, Prepware ATP was updated on November 1, 2026 and ADF + RMI Trainer on October 23, 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.*