# Samsara Driver vs GTP API Gravity Calculator2

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.

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.

## The numbers

| Metric | Samsara Driver | GTP API Gravity Calculator2 |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.8 (52K ratings)](https://appshunter.io/ios/app/samsara-driver/id1106069401/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/gtp-api-gravity-calculator2/id6742924006/reviews) |
| Number of ratings | **52K** | 1 |
| Positive reviews | 60.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | **Free** | Paid |
| Best chart rank | #181 | **#176** |
| Size | 331 MB | 9 MB |
| Requires iOS | 15.5 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Samsara Networks, Inc.](https://appshunter.io/developer/1018939262) | [Gammon Technical Products](https://appshunter.io/developer/1163782116) |

## What reviewers say

### Samsara Driver

[App page](https://appshunter.io/ios/app/samsara-driver/id1106069401)

**Currently charting:** #181 Top Free · Utilities (US App Store)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Responsive and efficient
- 💡 Helpful features like photo taking and dispatch integration
- 🚛 Useful for truck drivers and fleet managers

**What reviewers complain about**

- 🐛 Glitches and bugs causing issues with duty status changes and log accuracy
- 🔍 Lack of visibility into hours of service and recapped time
- 🔔 Excessive and inaccurate notifications/warnings
- 🔧 Difficult to manually edit logs and fix issues

**Reported bugs**

- 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**

- 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

[App page](https://appshunter.io/ios/app/gtp-api-gravity-calculator2/id6742924006)

**Currently charting:** #176 Top Paid · Utilities (US App Store)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*