Meshtastic vs GTP API Gravity Calculator2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Meshtastic
This app enables off-grid, decentralized communication via a low-power mesh network. Send text messages in areas lacking cellular or WiFi service.
- Off-grid communication
- Decentralized mesh network
- Low-power LoRa radio support
- Text messaging
- No cellular/WiFi required
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Meshtastic® is an open source, off-grid, decentralized, mesh network built to run on low-power Lora radios letting you send text messages in areas without reliable cellular or WiFi service.
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
Meshtastic and GTP API Gravity Calculator2 both sit at 4.1 stars, but that hides the real split: 100% of GTP API Gravity Calculator2's written reviews are positive against 44% of Meshtastic's. GTP API Gravity Calculator2 also leads on iOS requirement (12.0 vs 17.5). Meshtastic's advantage is price (Free vs $9.99) and update cadence (every 10 days vs every 2 months). On rating, 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
Meshtastic 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 — 4.1 for Meshtastic against 4.0 for GTP API Gravity Calculator2. That said, the two scores are not equally well evidenced: Meshtastic has 824 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 44% of Meshtastic's written reviews are positive against 100% of GTP API Gravity Calculator2's.
Meshtastic ships an update every 10 days, GTP API Gravity Calculator2 every 2 months. The most recent releases landed on October 14, 2026 and September 24, 2026 respectively.
| Parameter | Meshtastic | GTP API Gravity Calculator2 |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 4.1 (824 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 44.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 824 — better | 1 |
| Update frequency | Every 10 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone, iPod |
| Requires iOS | 17.5 | 12.0 — better |
| Further details — not scored | ||
| Size | 95 MB | 9 MB |
| Age rating | 12+ | 4+ |
| Developer | Meshtastic LLC | Gammon Technical Products |
Customer experience
Meshtastic
GTP API Gravity Calculator2
Bugs and requests
Meshtastic
Reported bugs
4 issues- Canned messages configuration issues
- Location sharing and traceroute functions not working
- Settings screen bugs and crashes
- Inconsistent behavior when switching between devices
Requested features
5 requests- Offline maps support
- Ability to customize notifications
- More sorting and filtering options for nodes
- Apple Watch and Shortcuts integration
- Improved documentation and user guidance
GTP API Gravity Calculator2
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Meshtastic
No in-app purchases
GTP API Gravity Calculator2
No in-app purchases
Questions
Is Meshtastic free?
Is GTP API Gravity Calculator2 free?
Which has better reviews, Meshtastic or GTP API Gravity Calculator2?
Do Meshtastic or GTP API Gravity Calculator2 have ads?
Which is updated more often, Meshtastic or GTP API Gravity Calculator2?
Other comparisons
