# Flight Test X20 vs Alert Simulator

The clearest difference is update cadence: Alert Simulator at every 2 weeks against Flight Test X20's every 5 weeks. Flight Test X20's advantage is iOS requirement (14.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Flight Test X20 ships an update every 5 weeks, Alert Simulator every 2 weeks. The most recent releases landed on October 16, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Flight Test X20 | Alert Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (93 ratings)](https://appshunter.io/ios/app/flight-test-x20/id1501097608/reviews)** | — |
| Number of ratings | **93** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 25 MB | 4 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Sheppard Air, Inc.](https://appshunter.io/developer/595077420) | [Brice Rosenzweig](https://appshunter.io/developer/315123923) |

## What reviewers say

### 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


### Alert Simulator

[App page](https://appshunter.io/ios/app/alert-simulator/id6739960579)

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

**In-app purchases:** none


## Frequently asked questions

### Is Flight Test X20 free?

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

### Is Alert Simulator free?

Alert Simulator is free to download, with no in-app purchases.

### Do Flight Test X20 or Alert Simulator have ads?

Neither Flight Test X20 nor Alert Simulator shows ads.

### Which is updated more often, Flight Test X20 or Alert Simulator?

Flight Test X20 ships an update every 5 weeks, and Alert Simulator every 2 weeks. Most recently, Flight Test X20 was updated on October 16, 2026 and Alert Simulator on September 29, 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.*