# PreFlight vs BASI Study

The clearest difference is price: BASI Study at Free against PreFlight's $2.99. BASI Study also leads on update cadence (every 6 weeks vs every 10 months) and device support (3 vs 1). PreFlight's advantage is iOS requirement (11.0 vs 15.2). On ads and in-app purchases there is nothing between them.

BASI Study is free to download; PreFlight costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PreFlight ships an update every 10 months, BASI Study every 6 weeks. The most recent releases landed on June 5, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | PreFlight | BASI Study |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 6 weeks** |
| Monetization | Paid | — |
| Size | 57 MB | 111 MB |
| Requires iOS | **11.0** | 15.2 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mountain Wave Media Ltd](https://appshunter.io/developer/849216893) | [British Association of Snowsport Instructors](https://appshunter.io/developer/1263937730) |

## What reviewers say

### PreFlight

[App page](https://appshunter.io/ios/app/preflight-grob-tutor/id1227306033)

This app helps aircrew practice normal and emergency drills for the Grob Tutor T1 aircraft. It provides instant feedback on instrument and switch selections, serving as a memory aid for flight reference cards.

**Highlights:** Practice normal and emergency drills, Instant feedback on instrument/switch selection, Supports Grob Tutor T1 (Classic & EA), Memory aid for flight reference cards, Designed for aircrew training

**Features:** macOS Compatibility

**In-app purchases:** none


### BASI Study

[App page](https://appshunter.io/ios/app/basi-study/id1593375840)

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

**In-app purchases:** none


## Frequently asked questions

### Is PreFlight free?

PreFlight costs $2.99, with no in-app purchases.

### Is BASI Study free?

BASI Study is free to download, with no in-app purchases.

### Do PreFlight or BASI Study have ads?

Neither PreFlight nor BASI Study shows ads.

### Which is updated more often, PreFlight or BASI Study?

PreFlight ships an update every 10 months, and BASI Study every 6 weeks. Most recently, PreFlight was updated on June 5, 2026 and BASI Study on September 13, 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.*