iVAC vs Aircraft Perf Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iVAC
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.
- 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)
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iVAC : une application de pilotes pour les pilotes. iVAC est une application qui vous propose un accès rapide à l'atlas VAC/IAC/DIRCAM FRANCE et Outre-Mer du SIA. L'application intègre également désormais l'atlas des terrains ULM du site BASULM. Si un accès à Internet est disponible, l’application télécharge automatiquement la dernière mise à jour d'une carte et l'affiche. Si l’accès à Internet n’est pas disponible (en altitude par exemple), l’application affiche automatiquement la dernière version téléchargée de la carte. Quelles que soient les conditions réseau, vous disposez toujours d’une carte plus ou moins récente pour tous les aérodromes français. Une mise à jour mensuelle est mise en ligne par le SIA et iVAC vous en informe pour vous en proposer le téléchargement complet. Les données téléchargées proviennent du site du SIA et de BASULM : https://www.sia.aviation-civile.gouv.fr https://basulm.ffplum.fr Fonctionnalités : - Stockage des cartes sur votre appareil pour une consultation sans connexion à internet - Affichage des cartes des terrains VAC/IAC Métropole et Outre-Mer - Affichage des cartes des hélistations Métropole et Outre-Mer - Affichage des cartes des terrains ULM - Affichage des terrains par nom ou code OACI - Recherche de terrains par nom ou code OACI - Onglet favoris regroupant vos cartes préférées - Onglet récent regroupant les cartes consultées récemment - Affichage des cartes en portrait et paysage - Affichage des cartes en plein écran - Impression et partage des cartes Avec l'abonnement Premium d'iVAC, profitez également de la possibilité d'organiser vos cartes par dossiers, de la possibilité d'afficher les cartes en mode nuit (écriture blanche sur fond noir) et de trier les cartes par proximité. Conditions d'utilisation : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Aircraft Perf Calculator
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.
- Real-time performance calculations
- Adjusted takeoff distance
- Corrected climb rate
- Runway usage percentage
- Density altitude calculation
- Comprehensive airfield database
- Geolocation and real-time weather
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Real-time performance calculations Performance turns your takeoff numbers into an instant read-out. No more paper charts in the cockpit — enter your manufacturer data and the app does the rest. KEY FEATURES Adjusted takeoff distance Computed automatically for the current altitude and temperature Corrected climb rate The real-world impact of density altitude on your performance Runway usage The percentage of runway required, shown at a glance Density altitude Automatic standard ISA calculation Comprehensive database Over 29,000 airfields (ICAO codes and names) Geolocation Airfields within a 100 NM radius Calculations at your current position Real-time GPS altitude and temperature Automatic/Assisted Selection of Runways based on the wind length of the runway, pilots can select graphically the appropriate runway as well. display of TODA, TORA,etc.. Built-in weather Temperature and elevation estimated automatically via Open-Meteo Visual alerts Color-coded for normal, good, degraded, or poor conditions TRUSTED BY OVER 6,000 PILOTS Co-developed with Xavier ULLIANA — microlight instructor and mountain pilot, and a member of France's national Mountain Flying division. "In the mountains and on the flatlands alike, density altitude isn't a theoretical notion — it's a daily reality. Performance gives me an instant, clear picture of my true performance." — Xavier ULLIANA, Microlight Instructor Algorithm based on the Koch curve, with validated correction factors. PRACTICAL AND RELIABLE Works offline Automatically saves your settings Favorites list for the airfields you fly most Available in French and English Real-time calculations IMPORTANT Performance is a decision-support tool. The pilot in command remains responsible for: Verifying all calculations The final assessment of flight conditions The final decision to take off Compliance with their aircraft's flight manual Factors such as crosswind, runway slope, and surface condition remain for the pilot to assess. Always verify against your flight manual. Safe flights!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 28, 2026 and September 23, 2026 respectively.
| Parameter | iVAC | Aircraft Perf Calculator |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 78.9% of reviews — better | 50.0% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Every 2 weeks — better | Every 7 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium — better | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 14.0 — better |
| Further details — not scored | ||
| Size | 107 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Julien Rozé | amenai technologies |
Customer experience
iVAC
Aircraft Perf Calculator
In-app purchases
iVAC
- Premium annuel$3.991 Year
Aircraft Perf Calculator
No in-app purchases
Questions
Is iVAC free?
Is Aircraft Perf Calculator free?
Do iVAC or Aircraft Perf Calculator have ads?
Which is updated more often, iVAC or Aircraft Perf Calculator?
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