# GTRMax vs Units

The clearest difference is review sentiment: GTRMax at 83% against Units's 45%. GTRMax also leads on in-app purchases (none vs 3) and update cadence (every 9 days vs every 5 weeks). Units's advantage is rating (4.9 vs 4.7) and ratings volume (261 vs 26). On price, ads and device support there is nothing between them.

Both are free to download. Units sells 3 in-app purchases, starting at $0.99 per month. GTRMax asks for nothing beyond the download.

Units holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Units has 261 ratings behind it against 26, so its average is the more settled of the two. Written reviews complicate that: 83% of GTRMax's written reviews are positive against 45% of Units's, so the app with the better star average is not the one people write more warmly about.

GTRMax ships an update every 9 days, Units every 5 weeks. The most recent releases landed on October 2, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | GTRMax | Units |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (26 ratings)](https://appshunter.io/ios/app/gtrmax/id958196557/reviews) | **[4.9 (261 ratings)](https://appshunter.io/ios/app/units-unit-converter/id1527329982/reviews)** |
| Number of ratings | 26 | **261** |
| Positive reviews | **83.3% of reviews** | 45.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 5 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 23 MB | 3 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [SIGIS Soluciones Integrales GIS, C.A.](https://appshunter.io/developer/912150464) | [Andreas Maier](https://appshunter.io/developer/454364359) |

## What reviewers say

### GTRMax

[App page](https://appshunter.io/ios/app/gtrmax/id958196557)

This advanced system offers real-time satellite tracking and management for various fleets, including cars, cargo, ships, and aircraft. It provides continuous monitoring, control, protection, and essential tools like alerts, reporting, and maintenance management.

**Highlights:** Real-time satellite location tracking, Fleet monitoring and control, Vehicle protection and management, Alert notifications, Reporting tools, Maintenance management

**Features:** macOS Compatibility

**In-app purchases:** none


### Units

[App page](https://appshunter.io/ios/app/units-unit-converter/id1527329982)

Easily convert between a wide range of measurement units and currencies. Features a clear and simple interface for quick conversions of length, mass, volume, speed, and more. Supports popular currencies and common units for everyday use.

**Highlights:** Extensive unit conversions, Multiple currency support, Easy and clear handling, Converts length, mass, volume, Supports speed, area, pressure, Converts time and temperature

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Yearly | $4.99 | per year |
| One time purchase | $9.99 | one-time |


## Frequently asked questions

### Is GTRMax free?

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

### Is Units free?

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

### Which has better reviews, GTRMax or Units?

Units is rated higher. GTRMax averages 4.7 out of 5 from 26 ratings, while Units averages 4.9 from 261 ratings.

### Do GTRMax or Units have ads?

Neither GTRMax nor Units shows ads.

### Which is updated more often, GTRMax or Units?

GTRMax ships an update every 9 days, and Units every 5 weeks. Most recently, GTRMax was updated on October 2, 2026 and Units on October 11, 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.*