GTViewer vs Esders Connect
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.
Esders Connect
This app facilitates the management of measurement data from compatible devices. It allows users to wirelessly transfer readings via Bluetooth and mobile networks, generating PDF reports for easy documentation and access from any location.
- Bluetooth data transfer
- Mobile network data transmission
- PDF report generation
- Paperless documentation
- Secure data encryption
- DSGVO compliant
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Esders Connect is our new web-based portal for easy management of your measurement data. With the help of our Esders Connect App you can use this service for the GasTest delta3 and the OLLI. You can read out your measurement data from the devices via Bluetooth and send it to Esders Connect via the mobile network, i.e. directly from the construction site to the office. With the help of our Esders Connect App you can use this service for the GasTest delta3 and the OLLI. You can view and retrieve your measurement data at any time via our portal. How does it work? You connect to your measuring device via Bluetooth. Now you can select the measurement to be evaluated and send it via LTE. After a few seconds you will receive a report in PDF format. Your advantages • Fast transmission of measurement data from the construction site to the office • Simple and paperless documentation • Secure encryption of your data • DSGVO compliant • The same database (logs and documents) is available to all users, whether in the office or on the construction site, all participants can access the data simultaneously
Screenshots
Verdict
The clearest difference is review sentiment: GTViewer at 50% against Esders Connect's 0%. GTViewer also leads on update cadence (monthly vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.
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, Esders Connect every 2 months. The most recent releases landed on September 16, 2026 and August 18, 2026 respectively.
| Parameter | GTViewer | Esders Connect |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (4 ratings) — better | — |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 4 — better | — |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.5 | 15.0 — better |
| Further details — not scored | ||
| Size | 25 MB | 91 MB |
| Age rating | 4+ | 4+ |
| Developer | Graphic Technologies, Inc. | Esders GmbH |
Customer experience
GTViewer
Esders Connect
In-app purchases
GTViewer
No in-app purchases
Esders Connect
No in-app purchases
