Samsara Driver vs GTP API Gravity Calculator2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Samsara Driver
This app helps professional drivers manage daily tasks efficiently and safely. It streamlines Hours of Service compliance, vehicle inspections, and navigation. Drivers can also track performance, receive recognition, and access support, all within a single, easy-to-use interface.
- Hours of Service (HOS) logging and compliance
- Vehicle inspection and DVIR submission
- Safety scores and coaching tasks
- Task, document, and route management
- Gamified recognition and motivation features
- Real-time navigation and messaging
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The Driver App that works the way you do. Samsara Driver gives professional drivers everything they need to stay safe, complete daily tasks faster, get recognized for their work, and stay connected—no matter where the job takes them. Whether you’re managing Hours of Service (HOS) compliance, completing vehicle inspections, or navigating to your next stop, Samsara Driver brings your most important workflows together in one easy-to-use app. Stay on track with your Compliance • Log and certify your Hours of Service directly in the app • Receive alerts for upcoming breaks and potential violations • Access and share inspection reports with roadside officials in a second Stay safe on the road • See safety scores, active coaching tasks, and key performance trends. • Review and acknowledge safety events directly in the app. • Complete training in short, mobile-friendly formats. Complete everyday workflows • Access tasks, documents, routes, and forms in just a few taps. • Submit DVIRs and inspections with a few clicks and no paper. • Reduce skipped steps with guided, tile-based workflows. Get recognized & stay motivated • View scorecards, badges, and streaks. • Receive kudos for great driving. • Track milestones and climb the leaderboard. Access help when it matters • Get routing guidance and real-time navigation. • Message managers or dispatch without leaving the app. • Use SOS to call for help or flag emergencies. Why drivers love Samsara Driver • Easy access to the tools and workflows you use every day. • End-of-day recaps reinforce safe habits and recognize achievements. • Built-in gamification keeps you engaged and motivated.
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: Samsara Driver at Free against GTP API Gravity Calculator2's $9.99. Samsara Driver also leads on rating (4.8 vs 4.0) and ratings volume (52K vs 1). GTP API Gravity Calculator2's advantage is review sentiment (100% vs 60%) and iOS requirement (12.0 vs 15.5). On ads, in-app purchases, chart position 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
Samsara Driver 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.
Samsara Driver holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Samsara Driver has 52K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 60% of Samsara Driver's written reviews are positive against 100% of GTP API Gravity Calculator2's, so the app with the better star average is not the one people write more warmly about.
Samsara Driver ships an update every 3 weeks, GTP API Gravity Calculator2 every 2 months. The most recent releases landed on November 4, 2026 and October 28, 2026 respectively.
| Parameter | Samsara Driver | GTP API Gravity Calculator2 |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 4.8 (52K ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 60.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 52K — 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 | #181 | #176 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.5 | 12.0 — better |
| Further details — not scored | ||
| Size | 331 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Samsara Networks, Inc. | Gammon Technical Products |
Customer experience
Samsara Driver
GTP API Gravity Calculator2
Bugs and requests
Samsara Driver
Reported bugs
4 issues- App randomly logging out users while driving
- Inaccurate duty status changes and driving time tracking
- Issues with trailer information and pre/post-trip inspections
- Syncing problems between app and vehicle data
Requested features
4 requests- Split sleeper functionality that works as expected
- Better notification system with customizable alerts
- Ability to view logs and hours on multiple devices
- More flexibility in duty status changes and yard moves
GTP API Gravity Calculator2
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Samsara Driver
No in-app purchases
GTP API Gravity Calculator2
No in-app purchases
Questions
Is Samsara Driver free?
Is GTP API Gravity Calculator2 free?
Which has better reviews, Samsara Driver or GTP API Gravity Calculator2?
Do Samsara Driver or GTP API Gravity Calculator2 have ads?
Which is updated more often, Samsara Driver or GTP API Gravity Calculator2?
Which is more popular, Samsara Driver or GTP API Gravity Calculator2?
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