1200.aero vs GTP API Gravity Calculator2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
1200.aero
This app enables airports and FBOs to monitor aircraft towing in real-time, calculate towing expenses, capture pre-tow images, and view aircraft parking locations on maps. It is designed for minimal user input and supports offline functionality.
- Real-time towing operation tracking
- Quantify total towing expenses
- Capture pre-tow pictures
- View actual parking positions on maps
- Minimal user input required
- Offline operation support
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1200.aero's mobile app helps airports and FBOs track towing operations in real time, quantify total spent towing aircraft, take pre-tow pictures, and see actual parking positions in our maps. The app requires minimal user input and allows for offline operation.
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: 1200.aero at Free against GTP API Gravity Calculator2's $9.99. 1200.aero also leads on update cadence (every 3 weeks vs every 2 months). GTP API Gravity Calculator2's advantage is chart position (#193 vs unranked) and iOS requirement (12.0 vs 15.1). On rating, ratings volume, ads and in-app purchases 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
1200.aero 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.
On the App Store both sit at effectively the same score — 4.0 for 1200.aero against 4.0 for GTP API Gravity Calculator2. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
1200.aero ships an update every 3 weeks, GTP API Gravity Calculator2 every 2 months. Both last shipped on September 8, 2026.
| Parameter | 1200.aero | GTP API Gravity Calculator2 |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 4.0 (2 ratings) | 4.0 (1 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Best chart rank | — | #193 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 12.0 — better |
| Further details — not scored | ||
| Size | 41 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | 1200.aero | Gammon Technical Products |
Customer experience
1200.aero
GTP API Gravity Calculator2
In-app purchases
1200.aero
No in-app purchases
GTP API Gravity Calculator2
No in-app purchases
Questions
Is 1200.aero free?
Is GTP API Gravity Calculator2 free?
Which has better reviews, 1200.aero or GTP API Gravity Calculator2?
Do 1200.aero or GTP API Gravity Calculator2 have ads?
Which is updated more often, 1200.aero or GTP API Gravity Calculator2?
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