# Gammon API Gravity Calculator vs ASTM 6B Table

The clearest difference is price: ASTM 6B Table at $1.99 against Gammon API Gravity Calculator's $9.99. Gammon API Gravity Calculator's advantage is chart position (#41 vs #192) and iOS requirement (8.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Gammon API Gravity Calculator costs $9.99 and ASTM 6B Table $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Gammon API Gravity Calculator | ASTM 6B Table |
| --- | --- | --- |
| Price | $9.99 | **$1.99** |
| Rating | **[3.6 (10 ratings)](https://appshunter.io/ios/app/gammon-api-gravity-calculator/id1163782117/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Monetization | Paid | — |
| Best chart rank | **#41** | #192 |
| Size | 10 MB | 1 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gammon Technical Products](https://appshunter.io/developer/1163782116) | [zhandos uakanov](https://appshunter.io/developer/625286817) |

## What reviewers say

### Gammon API Gravity Calculator

[App page](https://appshunter.io/ios/app/gammon-api-gravity-calculator/id1163782117)

**Currently charting:** #41 Top Paid · Reference (US App Store)

Calculate corrected API gravity for jet, gasoline, and diesel fuels at 60°F. This digital tool also determines the total weight of the fuel, replicating the functionality of physical slide calculators.

**Highlights:** Corrected API gravity calculation, Fuel weight calculation, Supports jet, gasoline, and diesel fuels, Digital slide calculator replacement, Accurate at 60°F

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

**In-app purchases:** none


### ASTM 6B Table

[App page](https://appshunter.io/ios/app/astm-6b-table/id6480513283)

**Currently charting:** #192 Top Paid · Reference (US App Store)

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

**In-app purchases:** none


## Frequently asked questions

### Is Gammon API Gravity Calculator free?

Gammon API Gravity Calculator costs $9.99, with no in-app purchases.

### Is ASTM 6B Table free?

ASTM 6B Table costs $1.99, with no in-app purchases.

### Do Gammon API Gravity Calculator or ASTM 6B Table have ads?

Neither Gammon API Gravity Calculator nor ASTM 6B Table shows ads.

### Which is more popular, Gammon API Gravity Calculator or ASTM 6B Table?

Gammon API Gravity Calculator currently peaks at #41 in the App Store charts, and ASTM 6B Table at #192. Chart position reflects recent download velocity rather than total install base.

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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.*