# GTViewer vs ELM FieldSight

The clearest difference is rating: ELM FieldSight at 5.0 against GTViewer's 3.8. GTViewer's advantage is update cadence (fortnightly vs monthly) and ratings volume (4 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

ELM FieldSight holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

GTViewer ships an update fortnightly, ELM FieldSight monthly. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | GTViewer | ELM FieldSight |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (4 ratings)](https://appshunter.io/ios/app/gtviewer/id905970171/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/elm-fieldsight/id6444499927/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free | Free |
| Size | 25 MB | 32 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Graphic Technologies, Inc.](https://appshunter.io/developer/460458003) | [ELM Fieldsight LLC](https://appshunter.io/developer/1654990606) |

## 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


### ELM FieldSight

[App page](https://appshunter.io/ios/app/elm-fieldsight/id6444499927)

Monitor your ELM FieldSight Microgrid Controller in real-time. Access data from your ELM Microgrid Battery Energy Storage System using your existing web portal credentials. This app requires an ELM Microgrid system to function.

**Highlights:** Real-time monitoring, Microgrid Controller access, Battery Energy Storage System data, Web portal credential integration, Mobile access to system data

**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 ELM FieldSight free?

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

### Which has better reviews, GTViewer or ELM FieldSight?

ELM FieldSight is rated higher. GTViewer averages 3.8 out of 5 from 4 ratings, while ELM FieldSight averages 5.0 from 1 ratings.

### Do GTViewer or ELM FieldSight have ads?

Neither GTViewer nor ELM FieldSight shows ads.

### Which is updated more often, GTViewer or ELM FieldSight?

GTViewer ships an update fortnightly, and ELM FieldSight monthly. Most recently, GTViewer was updated on October 29, 2026 and ELM FieldSight on October 21, 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.*