Gammon API Gravity Calculator vs Oilfield
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gammon API Gravity Calculator
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.
- Corrected API gravity calculation
- Fuel weight calculation
- Supports jet, gasoline, and diesel fuels
- Digital slide calculator replacement
- Accurate at 60°F
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The GTP API Gravity Calculator from Gammon Technical Products, Inc. provides users the ability to determine corrected API at 60 Deg F for jet, gasoline, and diesel fuels. The calculator is a digital version of our GTP-3012-1A and GTP-2727EF slide calculators and it also is capable of calculating the total weight of the fuel.
Oilfield
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Simplify essential oilfield calculations with this all-in-one app! Designed for oil and gas professionals, this app combines tools for API gravity, volume correction, and flow rate calculations in a user-friendly interface. Key Features: • API Gravity Calculation: Instantly calculate API gravity and standard density using ASTM D1298 standards. • Volume Correction Factor (VCF): Adjust liquid volumes to standard conditions (15°C or 60°F). • Flow Rate Calculator: Calculate pipeline flow rates with options for pipe diameter, velocity, and unit flexibility. • Unit Flexibility: Switch between mm/inch, m/s/ft/s, bbl/hr, and L/min. • Intuitive Design: Simple toggles and input fields for quick, accurate results. Whether in the field or at the office, Oilfield: Gravity & Flow Calc is your go-to solution for reliable, efficient calculations. Download now to optimize your workflow!
Screenshots
Verdict
The clearest difference is price: Oilfield at $1.99 against Gammon API Gravity Calculator's $9.99. Gammon API Gravity Calculator's advantage is chart position (#46 vs unranked) and iOS requirement (8.0 vs 16.2). On 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
Gammon API Gravity Calculator costs $9.99 and Oilfield $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Gammon API Gravity Calculator | Oilfield |
|---|---|---|
| Price | $9.99 | $1.99 — better |
| Rating | 3.6 (10 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 10 — better | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #46 — better | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 16.2 |
| Further details — not scored | ||
| Size | 10 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Gammon Technical Products | zhandos uakanov |
In-app purchases
Gammon API Gravity Calculator
No in-app purchases
Oilfield
No in-app purchases



