# GTViewer vs Inventsys

GTViewer and Inventsys are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

GTViewer ships an update monthly, Inventsys every 3 weeks. The most recent releases landed on September 16, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | GTViewer | Inventsys |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (4 ratings)](https://appshunter.io/ios/app/gtviewer/id905970171/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 25 MB | 99 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Graphic Technologies, Inc.](https://appshunter.io/developer/460458003) | [Inventsys AG](https://appshunter.io/developer/1446863737) |

## What reviewers say

### GTViewer

[App page](https://appshunter.io/ios/app/gtviewer/id905970171)

This application allows users to download and view geospatial data on Apple devices without an internet connection. It functions similarly to a web-based counterpart but is designed for offline use.

**Highlights:** Offline geospatial data viewing, Downloadable data, Apple device compatibility, Geospatial data visualization

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Inventsys

[App page](https://appshunter.io/ios/app/inventsys/id1446863738)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GTViewer free?

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

### Is Inventsys free?

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

### Do GTViewer or Inventsys have ads?

Neither GTViewer nor Inventsys shows ads.

### Which is updated more often, GTViewer or Inventsys?

GTViewer ships an update monthly, and Inventsys every 3 weeks. Most recently, GTViewer was updated on September 16, 2026 and Inventsys on September 23, 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.*