# HSI + ILS Trainer vs IT Knowledge

The clearest difference is price: IT Knowledge at Free against HSI + ILS Trainer's $9.99. IT Knowledge also leads on update cadence (every 4 days vs every 3 months) and iOS requirement (15.0 vs 18.6). HSI + ILS Trainer's advantage is in-app purchases (none vs 2) and chart position (#183 vs unranked). On ads and device support there is nothing between them.

IT Knowledge is free to download; HSI + ILS Trainer costs $9.99 up front. IT Knowledge sells 2 one-off in-app purchases. HSI + ILS Trainer asks for nothing beyond the download.

HSI + ILS Trainer ships an update every 3 months, IT Knowledge every 4 days. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | HSI + ILS Trainer | IT Knowledge |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hsi-plus-ils-trainer-ifr-pilot/id847496712/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | Paid | — |
| Best chart rank | **#183** | — |
| Size | 151 MB | 40 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Flygo-Aviation Ltd](https://appshunter.io/developer/550770776) | [Ali Alnuaimi](https://appshunter.io/developer/1880281818) |

## What reviewers say

### HSI + ILS Trainer

[App page](https://appshunter.io/ios/app/hsi-plus-ils-trainer-ifr-pilot/id847496712)

**Currently charting:** #183 Top Paid · Education (US App Store)

Master core radio-navigation skills for instrument flight training. This app offers interactive lessons and practice drills for HSI and ILS interpretation, intercepts, and tracking. It includes a built-in HSI simulator for briefings and classroom use, designed with flight instructors.

**Highlights:** HSI interpretation and course setting, ILS localizer and glideslope tracking, Intercept and correction practice, Interactive lessons for quick learning, IFR drills and scenarios, Built-in HSI simulator

**Features:** Vision Pro support

**In-app purchases:** none


### IT Knowledge

[App page](https://appshunter.io/ios/app/it-knowledge/id6761289369)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 20 Quiz Credits | $7.99 | one-time |
| 100 Quiz Credits | $19.99 | one-time |


## Frequently asked questions

### Is HSI + ILS Trainer free?

HSI + ILS Trainer costs $9.99, with no in-app purchases.

### Is IT Knowledge free?

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

### Do HSI + ILS Trainer or IT Knowledge have ads?

Neither HSI + ILS Trainer nor IT Knowledge shows ads.

### Which is updated more often, HSI + ILS Trainer or IT Knowledge?

HSI + ILS Trainer ships an update every 3 months, and IT Knowledge every 4 days. Most recently, HSI + ILS Trainer was updated on October 9, 2026 and IT Knowledge on October 10, 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.*