GTViewer vs Inventsys
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GTViewer
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.
- Offline geospatial data viewing
- Downloadable data
- Apple device compatibility
- Geospatial data visualization
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GTViewer downloads geospatial data for viewing on an Apple device like GTWeb, but in an offline fashion.
Inventsys
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Those responsible in the office as well as construction workers, well masters or technicians on site have all information about the system available everywhere. The transparent overview includes practical visualizations such as the location on a map and asset journals, as well as the status of all assets and the orders assigned to them in the cockpit. Work carried out, inspections, measurements, inspection rounds, etc. can be easily recorded and supplemented with pictures and comments. Observations can be easily reported so that further measures can be initiated. Login required: This app only works in conjunction with Inventsys maintenance software. Please contact your Inventsys representative before using this app. With the Inventsys cloud platform, public utilities can increase their daily efficiency, extend the life of their assets and avoid unplanned high costs due to breakdowns or accidents. You can achieve this within days thanks to the pre-configured maintenance and inspection processes for water, electricity or other public infrastructure assets. Inventsys is the only solution specifically for public utilities with a strong focus on mobile devices for employees, IoT integration and smart city, QR codes, geolocation and photo documentation, combined with all the benefits of the cloud.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | GTViewer | Inventsys |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (4 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.5 | 15.1 — better |
| Further details — not scored | ||
| Size | 25 MB | 99 MB |
| Age rating | 4+ | 4+ |
| Developer | Graphic Technologies, Inc. | Inventsys AG |
In-app purchases
GTViewer
No in-app purchases
Inventsys
No in-app purchases









