Comparison

GNSS Log App vs RD Quantum

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

GNSS Log App

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
Read full description

GNSS Obs - Professional Observation Logs GNSS Obs is the professional solution for documenting static GNSS observations. Designed for surveyors, geodesists, and geospatial professionals, it eliminates transcription errors and ensures consistent, accurate project documentation. Replace Paper Logs with Digital Precision Stop relying on paper forms, fillable PDFs, and handwritten notes. GNSS Obs provides a structured workflow that promotes accuracy and completeness while maintaining the professional standards required for geodetic control projects. Comprehensive Equipment Management Build and maintain your equipment library with support for: • Fixed height, collapsible and adjustable tripods • Antenna extensions • Integrated antenna/receiver configurations • Complete metadata for NGS compliance Import and export library items to share standardized configurations across your organization. Direct NGS Database Integration Access public monument data directly from: • National Geodetic Survey Integrated Database (IDB) • OPUS Share Database • NOAA CO-OPS Stations Monuments can also be entered manually when working with local control networks. OPUS Solution Integration Import OPUS solution emails to automatically populate: • Observed positions • Actual observation times • Session statistics • Solution quality metrics Include the complete OPUS solution in your PDF output for comprehensive project records. Essential Field Tools • Session timers with local notifications • Automatic weather recording at session start and end • Photo documentation with NGS-compliant naming • Satellite visibility diagrams using device motion sensors • Real-time editing before, during, and after observations Professional Documentation Export publication-ready PDF observation logs featuring: • Your company logo and branding • Complete equipment configurations • Weather conditions • Site photographs • Visibility diagrams • OPUS solutions Share via Files, email, AirDrop, or messaging. Note: This app documents observations and does not communicate with GNSS receivers. It is designed as a field companion for recording session metadata and producing professional deliverables. Privacy First All data remains on your device. No account required. Full control over exports and backups. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

RD Quantum

Features
Read full description

NOTE: You must have an xCAS user account to be able to use this app. RD Quantum is a mobile app for xCAS users. Download all license and permit data to your phone, use the GPS and compass to navigate to the area. Create notes to report back to xCAS system. Users can also see notes stored under each license.

Screenshots

GNSS Log App4 screens
RD Quantum3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level
GNSS Log App versus RD Quantum: the parameters behind the verdict, then further details
ParameterGNSS Log AppRD Quantum
PriceFreeFree
Rating4.9 (16 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings16 — better—
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.013.0 — better
Further details — not scored
Size204 MB23 MB
Age rating4+4+
DeveloperJohn MayStiftelsen Revenue Development

In-app purchases

None

GNSS Log App

No in-app purchases

None

RD Quantum

No in-app purchases

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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