# iVAC vs Aircraft Perf Calculator

The clearest difference is price: iVAC at Free against Aircraft Perf Calculator's $1.99. iVAC also leads on update cadence (every 2 weeks vs every 7 months) and review sentiment (79% vs 50%). Aircraft Perf Calculator's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

iVAC is free to download; Aircraft Perf Calculator costs $1.99 up front. iVAC sells 1 in-app purchase, starting at $3.99 per year. Aircraft Perf Calculator asks for nothing beyond the download.

iVAC ships an update every 2 weeks, Aircraft Perf Calculator every 7 months. The most recent releases landed on September 29, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | iVAC | Aircraft Perf Calculator |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ivac/id406796940/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **78.9% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 7 months |
| Monetization | **Freemium** | Paid |
| Size | 107 MB | 14 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Julien Rozé](https://appshunter.io/developer/326272897) | [amenai technologies](https://appshunter.io/developer/1699434028) |

## What reviewers say

### iVAC

[App page](https://appshunter.io/ios/app/ivac/id406796940)

Access French and overseas VAC/IAC/DIRCAM charts and ULM airfield maps offline. The app automatically displays the latest downloaded chart version when internet access is unavailable, ensuring you always have a recent map for French airfields. Monthly updates are provided, with notifications for new downloads.

**Highlights:** Offline chart storage, Search by name or ICAO code, Favorites and recent charts, Portrait and landscape view, Full-screen map display, Print and share maps, Organize charts by folder (Premium)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium annuel | $3.99 | per year |


### Aircraft Perf Calculator

[App page](https://appshunter.io/ios/app/aircraft-perf-calculator/id6541753665)

This app provides real-time performance calculations for pilots, converting takeoff numbers into instant readouts. It automatically computes adjusted takeoff distance, corrected climb rate, and runway usage based on current altitude and temperature, eliminating the need for paper charts.

**Highlights:** Real-time performance calculations, Adjusted takeoff distance, Corrected climb rate, Runway usage percentage, Density altitude calculation, Comprehensive airfield database, Geolocation and real-time weather

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

**In-app purchases:** none


## Frequently asked questions

### Is iVAC free?

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

### Is Aircraft Perf Calculator free?

Aircraft Perf Calculator costs $1.99, with no in-app purchases.

### Do iVAC or Aircraft Perf Calculator have ads?

Neither iVAC nor Aircraft Perf Calculator shows ads.

### Which is updated more often, iVAC or Aircraft Perf Calculator?

iVAC ships an update every 2 weeks, and Aircraft Perf Calculator every 7 months. Most recently, iVAC was updated on September 29, 2026 and Aircraft Perf Calculator on September 23, 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.*