# ADF + RMI Trainer vs AnswerStep

The clearest difference is in-app purchases: ADF + RMI Trainer at none against AnswerStep's 2. AnswerStep's advantage is update cadence (monthly vs every 4 months) and iOS requirement (16.0 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. AnswerStep sells 2 in-app purchases, starting at $6.99 per month. ADF + RMI Trainer asks for nothing beyond the download.

ADF + RMI Trainer ships an update every 4 months, AnswerStep monthly. The most recent releases landed on October 9, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | ADF + RMI Trainer | AnswerStep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (110 ratings)](https://appshunter.io/ios/app/adf-plus-rmi-trainer-ifr-pilot/id674942534/reviews)** | — |
| Number of ratings | **110** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Free | — |
| Size | 152 MB | 7 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Flygo-Aviation Ltd](https://appshunter.io/developer/550770776) | [ShenZhen SamApp Technology Development Co., Ltd](https://appshunter.io/developer/351047446) |

## What reviewers say

### 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


### AnswerStep

[App page](https://appshunter.io/ios/app/answerstep/id6765976822)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AnswerStep Pro | $6.99 | per month |
| AnswerStep Pro Annual | $49.99 | per year |


## Frequently asked questions

### Is ADF + RMI Trainer free?

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

### Is AnswerStep free?

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

### Do ADF + RMI Trainer or AnswerStep have ads?

Neither ADF + RMI Trainer nor AnswerStep shows ads.

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

ADF + RMI Trainer ships an update every 4 months, and AnswerStep monthly. Most recently, ADF + RMI Trainer was updated on October 9, 2026 and AnswerStep on October 5, 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.*