# AvGrav: API Fuel Gravity Calc. — FBO & Aviation Fuel Calculator

> FBO & Aviation Fuel Calculator (iPhone/iPad app by BRYSON JOHANSSON.)

- Source: https://appshunter.io/ios/app/avgrav-api-fuel-gravity-calc/id6804878148 (this page in markdown: same URL + `.md`)
- Developer: [BRYSON JOHANSSON](https://appshunter.io/developer/6780675253)
- Category: Utilities, Productivity
- Price: $0.99
- Age rating: 4+
- Requires: iOS 26.5 · 4 MB
- Languages: American English
- Released: 2026-09-03
- Data updated: 2026-10-10
- User reviews in markdown: https://appshunter.io/ios/app/avgrav-api-fuel-gravity-calc/id6804878148/reviews.md

## What is AvGrav?

AvGrav is the modernized, field-ready API fuel gravity calculator designed specifically for aviation line service technicians, FBO operations, and quality assurance personnel. 

Built from the ground up, AvGrav delivers instant, precise fuel density calculations right on your phone. 

Whether you are handling Jet-A, 100LL, Mogas, or Diesel, AvGrav calculates all your needs.

AvGrav uses standard, publicly verified ASTM formulas to calculate corrected API gravity at 60°F (15°C).

Key Features Include:

Apple Watch Companion App: Keep your hands free and calculate fuel gravity directly from your wrist while out on the field.

Aviation-First Design: A clean, high-contrast interface built for readability in high-glare outdoor conditions.

Instant Precision: Seamlessly calculate specific gravity and density for daily quality control and fuel farm management.

Add Photos and Descriptive Text: Never miss a beat with the ability to add photos for documentation.

History Tab: See all your previous fuel gravity calculations at a glance.

Send an Export: Send a professional looking report to any of your devices.

One-Time Purchase: $3.99 gets you full access. No subscriptions, no ads, and no recurring fees.

Equip your line crew with the ultimate digital QA tool and streamline your fueling operations today.

Note: This app is a tool / calculator and is to be used as such. For reference only. Always confirm your organization's official procedures, or local laws before accepting, testing, rejecting, verifying, any type of fuel load, Gravity test, etc..

## Chart rankings

- #167 in Top Paid · Utilities (US App Store)


## Version history (last 1 release)

### 1.0 — 2026-09-03

No release notes.

## More apps by BRYSON JOHANSSON

- [AvClock: Global Airport Times](https://appshunter.io/ios/app/avclock-global-airport-times/id6780675251)

All apps by BRYSON JOHANSSON: https://appshunter.io/developer/6780675253

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-10.*