# Prepware ATP vs ADI EFIS

The clearest difference is rating: ADI EFIS at 5.0 against Prepware ATP's 2.8. ADI EFIS also leads on price ($0.99 vs $9.99). Prepware ATP's advantage is ratings volume (20 vs 2) and chart position (#143 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Prepware ATP costs $9.99 and ADI EFIS $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ADI EFIS holds the better App Store score, 5.0 against 2.8. That said, the two scores are not equally well evidenced: Prepware ATP has 20 ratings behind it against 2, so its average is the more settled of the two.

## The numbers

| Metric | Prepware ATP | ADI EFIS |
| --- | --- | --- |
| Price | $9.99 | **$0.99** |
| Rating | [2.8 (20 ratings)](https://appshunter.io/ios/app/prepware-atp/id338890846/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/adi-efis/id6446143946/reviews)** |
| Number of ratings | **20** | 2 |
| Positive reviews | 36.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | **Free** | Paid |
| Best chart rank | **#143** | — |
| Size | 44 MB | 4 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ASA](https://appshunter.io/developer/334278379) | [Robert Walker](https://appshunter.io/developer/299475042) |

## What reviewers say

### Prepware ATP

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

**Currently charting:** #143 Top Paid · Education (US App Store)

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


### ADI EFIS

[App page](https://appshunter.io/ios/app/adi-efis/id6446143946)

This educational app simulates an aircraft's Attitude Direction Indicator (ADI) and compass using your device's internal sensors. It's designed for learning about Euler angles and aircraft orientation, mimicking a traditional EFIS display. Not intended for actual flight navigation.

**Highlights:** Simulates aircraft ADI and compass, Uses internal device sensors, Mimics traditional EFIS display, Educational tool for Euler angles, Supports iPhone and iPad

**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 ADI EFIS free?

ADI EFIS costs $0.99, with no in-app purchases.

### Which has better reviews, Prepware ATP or ADI EFIS?

ADI EFIS is rated higher. Prepware ATP averages 2.8 out of 5 from 20 ratings, while ADI EFIS averages 5.0 from 2 ratings.

### Do Prepware ATP or ADI EFIS have ads?

Neither Prepware ATP nor ADI EFIS shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*