Measurement Calculators vs GTP API Gravity Calculator2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Measurement Calculators
Perform essential calculations directly on your mobile device, eliminating the need for a computer. This app provides a convenient tool for on-the-go measurements and office tasks.
- In-field calculations
- Office calculations
- Computer-free operation
- Convenient mobile tool
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Calculators designed to allow for in the field, or office, calculations without having to power up your computer.
GTP API Gravity Calculator2
This application calculates the corrected API gravity at 60°F for jet, gasoline, and diesel fuels. It also determines the total weight of the fuel. It's a digital replacement for physical slide calculators.
- Corrected API gravity calculation
- Total fuel weight calculation
- Supports jet, gasoline, and diesel fuels
- Digital version of slide calculators
- Developed in 2025
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The GTP API Gravity Calculator v2 (Developed 2025) 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.
Screenshots
Verdict
The clearest difference is price: Measurement Calculators at Free against GTP API Gravity Calculator2's $9.99. Measurement Calculators also leads on rating (5.0 vs 4.0) and ratings volume (3 vs 1). GTP API Gravity Calculator2's advantage is update cadence (every 2 months vs every 6 months). On review sentiment, 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
Measurement Calculators is free to download; GTP API Gravity Calculator2 costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Measurement Calculators holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Measurement Calculators ships an update every 6 months, GTP API Gravity Calculator2 every 2 months. Both last shipped on October 24, 2026.
| Parameter | Measurement Calculators | GTP API Gravity Calculator2 |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 5.0 (3 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 0 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Kyle Walker | Gammon Technical Products |
Customer experience
Measurement Calculators
GTP API Gravity Calculator2
In-app purchases
Measurement Calculators
No in-app purchases
GTP API Gravity Calculator2
No in-app purchases
Questions
Is Measurement Calculators free?
Is GTP API Gravity Calculator2 free?
Which has better reviews, Measurement Calculators or GTP API Gravity Calculator2?
Do Measurement Calculators or GTP API Gravity Calculator2 have ads?
Which is updated more often, Measurement Calculators or GTP API Gravity Calculator2?
Other comparisons
