GNSS Log App vs FastXY
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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/
FastXY
This app enables high-accuracy GNSS data collection for professional surveying and GIS applications. It supports various data types, stake-out functions, and offline use, with multiple export options for seamless integration with other software.
- High-accuracy GNSS data collection
- Point, line, and polygon data capture
- Submeter or centimeter (RTK) accuracy
- Stake-out feature
- Offline data collection
- Multiple export formats (CSV, shp, DXF/DWG)
- Feature/attribute/value pick lists
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FastXY is a high-accuracy GNSS data collection app designed for use with Eos GNSS receivers (www.eos-gnss.com). Collect point, line, polygon data with submeter or centimeter (RTK) survey-grade accuracy or use its stake-out feature to stake points to survey-grade accuracy. After data is collected, upload your data via CSV, shp, DXF/DWG to your favorite GIS/CAD. Key features: -Setup feature/attribute/value pick lists for easy field data entry. Collect ad hoc data in the field without setting up ahead of time. -Stakeout points loaded from DXF/DWG, CSV or shp files. -Collect raw data for post-processing and auto-submit to OPUS from your mobile device (https://www.ngs.noaa.gov/OPUS/) -World-wide 3D base map for visual reference in the field. -Doesn’t require an internet connection.
Screenshots
Verdict
The clearest difference is ratings volume: GNSS Log App at 16 against FastXY's 3. FastXY's advantage is iOS requirement (15.5 vs 18.0). On price, rating, update cadence and ads 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.
On the App Store both sit at effectively the same score — 4.9 for GNSS Log App against 5.0 for FastXY. That said, the two scores are not equally well evidenced: GNSS Log App has 16 ratings behind it against 3, so its average is the more settled of the two.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 9, 2026 and July 19, 2026 respectively.
| Parameter | GNSS Log App | FastXY |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (16 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 16 — better | 3 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.5 — better |
| Further details — not scored | ||
| Size | 204 MB | 96 MB |
| Age rating | 4+ | 4+ |
| Developer | John May | Discovery Management Group |
Customer experience
GNSS Log App
FastXY
In-app purchases
GNSS Log App
No in-app purchases
FastXY
No in-app purchases









