Comparison

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.

Head to head
About

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.

Highlights
  • 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
Features
Currently charting
Read full description

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.

About

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.

Highlights
  • Corrected API gravity calculation
  • Total fuel weight calculation
  • Supports jet, gasoline, and diesel fuels
  • Digital version of slide calculators
  • Developed in 2025
Features
Currently charting
Read full description

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

Samsara Driver4 screens
GTP API Gravity Calculator21 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 4 level
Samsara Driver versus GTP API Gravity Calculator2: the parameters behind the verdict, then further details
ParameterSamsara DriverGTP API Gravity Calculator2
PriceFree — better$9.99
Rating4.8 (52K ratings) — better4.0 (1 ratings)
Positive reviews60.5% of reviews100.0% of reviews — better
Number of ratings52K — better1
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank#181#176 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.512.0 — better
Further details — not scored
Size331 MB9 MB
Age rating4+4+
DeveloperSamsara Networks, Inc.Gammon Technical Products

Customer experience

Samsara Driver

All ratings51,060 ratings
Positive95.1%
Neutral2.4%
Negative2.5%
Written reviews683 reviews
Positive60.5%
Neutral7.9%
Negative31.6%

GTP API Gravity Calculator2

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

None

Samsara Driver

No in-app purchases

None

GTP API Gravity Calculator2

No in-app purchases

Questions

Is Samsara Driver free?
Samsara Driver is free to download, with no in-app purchases.
Is GTP API Gravity Calculator2 free?
GTP API Gravity Calculator2 costs $9.99, with no in-app purchases.
Which has better reviews, Samsara Driver or GTP API Gravity Calculator2?
Samsara Driver is rated higher. Samsara Driver averages 4.8 out of 5 from 52K ratings, while GTP API Gravity Calculator2 averages 4.0 from 1 ratings.
Do Samsara Driver or GTP API Gravity Calculator2 have ads?
Neither Samsara Driver nor GTP API Gravity Calculator2 shows ads.
Which is updated more often, Samsara Driver or GTP API Gravity Calculator2?
Samsara Driver ships an update every 3 weeks, and GTP API Gravity Calculator2 every 2 months. Most recently, Samsara Driver was updated on November 4, 2026 and GTP API Gravity Calculator2 on October 28, 2026.
Which is more popular, Samsara Driver or GTP API Gravity Calculator2?
Samsara Driver currently peaks at #181 in the App Store charts, and GTP API Gravity Calculator2 at #176. Chart position reflects recent download velocity rather than total install base.

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