# GAB Aviation Tools vs ChronoCalc Pro

The clearest difference is price: ChronoCalc Pro at Free against GAB Aviation Tools's $2.99. ChronoCalc Pro also leads on iOS requirement (17.0 vs 26.0). GAB Aviation Tools's advantage is update cadence (every 4 weeks vs every 5 months). On ads, in-app purchases and device support there is nothing between them.

ChronoCalc Pro is free to download; GAB Aviation Tools costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GAB Aviation Tools ships an update every 4 weeks, ChronoCalc Pro every 5 months. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | GAB Aviation Tools | ChronoCalc Pro |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gab-aviation-tools/id6755129410/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 5 months |
| Monetization | Paid | — |
| Size | 33 MB | 4 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [GERT ANDREAS BARRING](https://appshunter.io/developer/1852119335) | [ERLEND JOHNSRUD VAAGE](https://appshunter.io/developer/1760100550) |

## What reviewers say

### GAB Aviation Tools

[App page](https://appshunter.io/ios/app/gab-aviation-tools/id6755129410)

This app provides aviation tools for pilots and enthusiasts, including flight planning, live traffic, weather data, and training aids. It helps users prepare for flights, track journeys, and access essential aviation information.

**Highlights:** Live ADS-B & OGN Traffic, Airport Log & Route Tracking, Nighttime & Flight Planning, Pilot Brief & Visual Planning, Duty Day Calculator, Weather & METAR/TAF, Holding Entry Trainer

**Features:** macOS Compatibility

**In-app purchases:** none


### ChronoCalc Pro

[App page](https://appshunter.io/ios/app/chronocalc-pro/id6757017750)

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

**In-app purchases:** none


## Frequently asked questions

### Is GAB Aviation Tools free?

GAB Aviation Tools costs $2.99, with no in-app purchases.

### Is ChronoCalc Pro free?

ChronoCalc Pro is free to download, with no in-app purchases.

### Do GAB Aviation Tools or ChronoCalc Pro have ads?

Neither GAB Aviation Tools nor ChronoCalc Pro shows ads.

### Which is updated more often, GAB Aviation Tools or ChronoCalc Pro?

GAB Aviation Tools ships an update every 4 weeks, and ChronoCalc Pro every 5 months. Most recently, GAB Aviation Tools was updated on October 31, 2026 and ChronoCalc Pro on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*