# Instrument Test Prep vs Flight Test X20

The clearest difference is rating: Instrument Test Prep at 4.9 against Flight Test X20's 3.9. Instrument Test Prep also leads on review sentiment (88% vs 61%) and update cadence (fortnightly vs every 5 weeks). Flight Test X20's advantage is in-app purchases (none vs 4) and iOS requirement (14.0 vs 17.1). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Instrument Test Prep sells 4 one-off in-app purchases. Flight Test X20 asks for nothing beyond the download.

Instrument Test Prep holds the better App Store score, 4.9 against 3.9. Both are backed by a comparable volume of ratings — 152 and 93 respectively. Written reviews point the same way: 88% of Instrument Test Prep's written reviews are positive against 61% of Flight Test X20's.

Instrument Test Prep ships an update fortnightly, Flight Test X20 every 5 weeks. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Instrument Test Prep | Flight Test X20 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (152 ratings)](https://appshunter.io/ios/app/instrument-test-prep/id1456043080/reviews)** | [3.9 (93 ratings)](https://appshunter.io/ios/app/flight-test-x20/id1501097608/reviews) |
| Number of ratings | **152** | 93 |
| Positive reviews | **87.5% of reviews** | 61.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 116 MB | 25 MB |
| Requires iOS | 17.1 | **14.0** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 12+ | 4+ |
| Developer | [Aeroapps Technology](https://appshunter.io/developer/923860276) | [Sheppard Air, Inc.](https://appshunter.io/developer/595077420) |

## What reviewers say

### Instrument Test Prep

[App page](https://appshunter.io/ios/app/instrument-test-prep/id1456043080)

Prepare for your FAA Instrument Rating Knowledge Test with a comprehensive question bank and detailed explanations. Customize study sessions, take simulated exams, and track your progress. An optional upgrade unlocks full ground school lessons and advanced features.

**Highlights:** Over 900 FAA questions with explanations, Customizable study sessions, Simulated FAA exams, Review missed questions, Track progress across devices, Study resources library

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Instrument Ground School Trial | Free | one-time |
| Instrument Rating Test Prep | $49.99 | one-time |
| Upgrade to Ground School | $129.99 | one-time |
| Instrument Ground School | $179.99 | one-time |


### Flight Test X20

[App page](https://appshunter.io/ios/app/flight-test-x20/id1501097608)

Prepare for FAA knowledge tests with this comprehensive study platform. It offers top-off preparation for various pilot and aviation professional written exams, including instrument rating and ATP.

**Highlights:** FAA knowledge test preparation, Pilot study course, Dispatcher study course, Instrument rating preparation, Instructor written test prep, ATP written test prep

**In-app purchases:** none


## Frequently asked questions

### Is Instrument Test Prep free?

Instrument Test Prep is free to download, with in-app purchases available.

### Is Flight Test X20 free?

Flight Test X20 is free to download, with no in-app purchases.

### Which has better reviews, Instrument Test Prep or Flight Test X20?

Instrument Test Prep is rated higher. Instrument Test Prep averages 4.9 out of 5 from 152 ratings, while Flight Test X20 averages 3.9 from 93 ratings.

### Do Instrument Test Prep or Flight Test X20 have ads?

Neither Instrument Test Prep nor Flight Test X20 shows ads.

### Which is updated more often, Instrument Test Prep or Flight Test X20?

Instrument Test Prep ships an update fortnightly, and Flight Test X20 every 5 weeks. Most recently, Instrument Test Prep was updated on September 24, 2026 and Flight Test X20 on September 22, 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.*