OkTAV vs GrapeVision
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OkTAV
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OkTAV est une application se présentant sous la forme d’un calculateur, permettant le calcul des volumes et TAV de mélanges hydro-alcooliques, et dont l’utilisation est destinée aux ressortissants de la filière Cognac. Par calcul, on entend des opérations du type conversions de TAV et de volume équivalent à 20°C en fonction de la température du mélange, et des coupes. Ces opérations se basent sur le Guide Pratique d'Alcoométrie qui recueille les tables des valeurs de conversion qui sont compilées dans OkTAV.
GrapeVision
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Decision support tool for winegrowers to optimize the treatments in the wineyard.
Screenshots
Verdict
The clearest difference is update cadence: GrapeVision at every 4 months against OkTAV's every 17 months. OkTAV's advantage is iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OkTAV ships an update every 17 months, GrapeVision every 4 months. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.
| Parameter | OkTAV | GrapeVision |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 17 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 5 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | BNIC | Bayer Group |
In-app purchases
OkTAV
No in-app purchases
GrapeVision
No in-app purchases
