# Off vs GmSpeedPlus

The clearest difference is in-app purchases: GmSpeedPlus at none against Off's 1. GmSpeedPlus also leads on ads (none vs shown) and rating (5.0 vs 4.6). Off's advantage is update cadence (every 4 months vs every 30 months) and ratings volume (763 vs 2). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Off sells 1 one-off in-app purchase. GmSpeedPlus asks for nothing beyond the download.

GmSpeedPlus holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Off has 763 ratings behind it against 2, so its average is the more settled of the two.

Off ships an update every 4 months, GmSpeedPlus every 30 months. The most recent releases landed on October 19, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Off | GmSpeedPlus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (763 ratings)](https://appshunter.io/ios/app/off-road-inclinometer/id1489831780/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/gmspeedplus/id6450876391/reviews)** |
| Number of ratings | **763** | 2 |
| Positive reviews | 77.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 30 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 24 MB | 4 MB |
| Requires iOS | 16.0 | 16 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Joaquin Tare](https://appshunter.io/developer/1489831779) | [George Mizzi](https://appshunter.io/developer/1506515053) |

## What reviewers say

### Off

[App page](https://appshunter.io/ios/app/off-road-inclinometer/id1489831780)

Monitor your vehicle's pitch and roll angles while off-roading. Features include customizable vehicles, alarms, and data logging for analysis. Offers a smooth user experience with a clean, relevant display.

**Highlights:** Read pitch and roll values, Customizable vehicle profiles, Pitch and roll alarms, Data logging and CSV export, Integrated compass, Themable interface

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock features | $3.99 | one-time |

**What reviewers like**

- 👍 Clean, simple, and professional interface
- ✅ Accurate incline and camber measurements
- 💰 Affordable premium version ($3) with no subscription
- 🎨 Customizable vehicle graphics and icons
- ⚙️ Easy zero/calibration reset functionality

**What reviewers complain about**

- 🐛 Inconsistent and inaccurate readings
- 📱 Intrusive ads in free version
- ⚠️ Occasional false/erratic measurements
- 🎨 Limited vehicle design options
- 📊 Basic graphics quality

**Reported bugs**

- Scam/virus warning pop-ups appearing on second use
- Slope percentage cannot be disabled despite settings
- Alarms set to 30 degrees produce no audible or visual feedback
- Inconsistent measurement accuracy requiring multiple resets
- Ad interruptions causing screen blanks during app use

**Requested features**

- CarPlay support
- Split View multitasking support
- Additional vehicle models (Jeep XJ, Bronco, Land Rover Discovery 2, Toyota Landcruiser 80/76 series)
- Bicycle and motorcycle designs
- Altitude reading display


### GmSpeedPlus

[App page](https://appshunter.io/ios/app/gmspeedplus/id6450876391)

This utility app provides a comprehensive dashboard with a speedometer, compass, calendar, clock, altimeter, and inclinometer. It also displays the phone's battery level and state, inspired by the needs of Kei-Truck enthusiasts.

**Highlights:** Speedometer (MPH/KPH), Compass, Calendar, Clock, Altimeter, Inclinometer, Battery Level Monitor

**In-app purchases:** none


## Frequently asked questions

### Is Off free?

Off is free to download, with in-app purchases available.

### Is GmSpeedPlus free?

GmSpeedPlus is free to download, with no in-app purchases.

### Which has better reviews, Off or GmSpeedPlus?

GmSpeedPlus is rated higher. Off averages 4.6 out of 5 from 763 ratings, while GmSpeedPlus averages 5.0 from 2 ratings.

### Do Off or GmSpeedPlus have ads?

Off shows ads; GmSpeedPlus does not.

### Which is updated more often, Off or GmSpeedPlus?

Off ships an update every 4 months, and GmSpeedPlus every 30 months. Most recently, Off was updated on October 19, 2026 and GmSpeedPlus on October 1, 2026.

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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.*