# GNSS Log App — GNSS Static Observation Log > Digital GNSS observation logging for surveyors and geodesists. (iPhone/iPad app by John May.) - Source: https://appshunter.io/ios/app/gnss-log-app/id1554968869 (this page in markdown: same URL + `.md`) - Developer: [John May](https://appshunter.io/developer/1554968871) - Category: Productivity, Utilities - Price: Free - Rating: 4.94/5 from 16 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 18.0 · 204 MB - Languages: English - Released: 2022-03-26 - Data updated: 2026-06-01 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/gnss-log-app/id1554968869/reviews.md ## What is GNSS Log App? 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/ ## Key features - 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 ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/gnss-log-app/id1554968869/reviews.md ### 5/5 — Best Survey App *2022-05-24* I love this app!!! It's very user friendly. Helps keep all my records in order. Great for archiving data and will help others down the road, after I’ve retired. This is the best app/log for any static survey. ## Frequently asked questions about GNSS Log App ### Does GNSS Log App have ads? No, GNSS Log App does not contain advertisements. It is a completely ad-free experience for users. ### What devices is GNSS Log App compatible with? GNSS Log App is compatible with both iPhone and iPad devices, offering a seamless experience across Apple's mobile ecosystem. ### How often is GNSS Log App updated? GNSS Log App was last updated on February 23, 2026, indicating a commitment to ongoing development and improvements. Users can expect regular updates. ### What is the age rating for GNSS Log App? GNSS Log App has an age rating of 4+, making it suitable for a wide range of users. This indicates it contains no mature content. ### Can I export my GNSS Log App data? Yes, GNSS Log App allows you to export your data in publication-ready PDF format. You can share these exports via Files, email, AirDrop, or messaging. ### Does GNSS Log App require an account? No, GNSS Log App is designed with privacy in mind and does not require an account. All your data remains on your device, giving you full control. ### How does GNSS Log App integrate with geodetic databases? GNSS Log App provides direct integration with the National Geodetic Survey Integrated Database (IDB), OPUS Share Database, and NOAA CO-OPS Stations. This allows for easy access to public monument data. ### What kind of professional documentation does GNSS Log App provide? GNSS Log App generates professional, publication-ready PDF observation logs that can include your company logo, equipment configurations, weather conditions, site photographs, visibility diagrams, and OPUS solutions. ## Version history (last 5 releases) ### 2.0.3 — 2026-04-27 Minor bug fixes with satellite track display on exported PDF ### 2.0.1 — 2026-02-23 What's New in Version 2.0.1 This major update enhances field workflows, mapping capabilities, and OPUS integration based on feedback from surveying professionals. Enhanced Satellite Visibility Diagrams • Satellite tracks now displayed during observation periods • Completely revised VQ rating algorithm with improved accuracy Streamlined Photo Documentation • Redesigned photo import and naming workflow • Attach photos directly to PDF export emails • Improved rotation, metadata handling, and reordering Improved OPUS Integration • Import OPUS email and xml solution files • Smart merging with conflict detection and warnings • Enhanced solution tables with difference calculations Professional Passive Control Map Interface • Interactive monument search with real-time filtering • Custom filter presets: GNSS Horizontal Control, Geodetic Leveling, Airport AC16, Tidal/Water Level, NSRS Tie, and more • Enhanced monument symbols with quality indicators • Get directions to monuments via Apple Maps • Reference tie extraction from published descriptions Equipment Library Enhancements • Adjustable leg tripod support with custom height validation • In-use equipment detection with visual indicators • Full-screen library views with multi-select capabilities • Export and import complete observation logs for backup and sharing Workflow Improvements • Refined navigation with smoother transitions • Scheduled vs. actual observation time tracking • Session notifications for completed observations • Import/Export individual Observation Logs PDF Export Updates • Multi-page support with attachment toggles • Revised Visibility diagrams with dashed satellite tracks • Tripod type display (Fixed/Collapsible/Adjustable) • Photo attachment options for complete documentation Technical Improvements • Enhanced performance • Improved monument proximity detection and merging • Better handling of large equipment libraries ### 1.4.6 — 2024-11-28 This version fixes a few minor bugs and updates the code for the new iOS releases. The target release for this build is iOS 17.6, and has been tested with iOS 18.1.1 ### 1.4.4 — 2024-03-25 This version fixed some small bugs and was built to work with iOS 17.0 ### 1.4.3 — 2023-07-06 Change Log V1.4.3 If you are new to the app, go to the library and load sample data. This will give you some items to experiment with. Improvements to confirmations and alerts. Added Pull to refresh to Home page and summary page Changed the naming to match the current OPUS Project naming convention 4CID-DOY-Start-Year. This will only apply if four character ID are enabled in the project. This is build 15, for iOS 16.2 For support, contact support@gnsslogapp.com ## Apps similar to GNSS Log App | App | Rating | Price | Category | | --- | --- | --- | --- | | [JAVAD Mobile Tools Authorised](https://appshunter.io/ios/app/javad-mobile-tools-authorised/id1413223703) | 3.0 (2) | Free | Productivity | | [vSite Scan](https://appshunter.io/ios/app/vsite-scan/id6446096649) | — | Free | Productivity | | [Trimble Perspective Mobile](https://appshunter.io/ios/app/trimble-perspective-mobile/id1540709156) | 4.0 (4) | Free | Productivity | | [Trimble SiteVision](https://appshunter.io/ios/app/trimble-sitevision/id1535590619) | 4.2 (5) | Free | Productivity | | [GIS Lite](https://appshunter.io/ios/app/gis-lite/id1548266173) | — | Free | Productivity | | [LiteSurvey Pro](https://appshunter.io/ios/app/litesurvey-pro/id6503436604) | — | Free | Productivity | ## Related topics [gnss log app](https://appshunter.io/ios/topics/gnss-log-app) · [gnss](https://appshunter.io/ios/topics/gnss) · [gnss performance analyzer](https://appshunter.io/ios/topics/gnss-performance-analyzer) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*