# GNSS Log App vs RD Quantum

The clearest difference is iOS requirement: RD Quantum at 13.0 against GNSS Log App's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

GNSS Log App ships an update every 2 months, RD Quantum every 5 weeks. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | GNSS Log App | RD Quantum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (16 ratings)](https://appshunter.io/ios/app/gnss-log-app/id1554968869/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 204 MB | 23 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [John May](https://appshunter.io/developer/1554968871) | [Stiftelsen Revenue Development](https://appshunter.io/developer/1597478317) |

## What reviewers say

### GNSS Log App

[App page](https://appshunter.io/ios/app/gnss-log-app/id1554968869)

This app provides a digital solution for surveyors and geodesists to document static GNSS observations. It offers comprehensive equipment management, direct integration with geodetic databases, and tools for field data collection, all while ensuring professional, publication-ready PDF output.

**Highlights:** Digital static GNSS observation logging, Comprehensive equipment library management, Direct NGS database integration, OPUS solution import and integration, Field tools: timers, weather, photos, visibility diagrams, Publication-ready PDF export, Privacy-focused, no account required

**In-app purchases:** none


### RD Quantum

[App page](https://appshunter.io/ios/app/rd-quantum/id1597477895)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GNSS Log App free?

GNSS Log App is free to download, with no in-app purchases.

### Is RD Quantum free?

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

### Do GNSS Log App or RD Quantum have ads?

Neither GNSS Log App nor RD Quantum shows ads.

### Which is updated more often, GNSS Log App or RD Quantum?

GNSS Log App ships an update every 2 months, and RD Quantum every 5 weeks. Most recently, GNSS Log App was updated on October 12, 2026 and RD Quantum on October 7, 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.*