Spatialize Tavak is a professional-grade field surveying application designed for surveyors, geologists, environmental scientists, and GIS professionals who need reliable GPS data collection in the field.

CORE FEATURES
• High-Precision GPS Tracking — Record survey tracks with real-time satellite status, accuracy indicators, and GNSS diagnostics.
• Offline-First Mapping — Work completely offline with cached OpenStreetMap basemaps. No internet required in the field.
• Feature Collection — Capture points, lines, and polygons into named survey layers, each with its own fields: text, numbers, dropdowns, multi-select, checkboxes, dates, times, ratings, photos and videos. Every object carries a name and description.
• Geotagged Media — Capture photos and videos with automatic geotagging, attach them to survey objects through form fields, or turn a photo into a point on the map.
• Geofencing & Alerts — Define geofence boundaries and receive arrival/departure notifications while surveying.
• Landmark Management — Save and navigate to important waypoints with bearing and distance calculations.
• Background Tracking — Continue recording GPS tracks even when the app is in the background or your screen is locked.

EXPORT & INTEROPERABILITY
• Open in QGIS, no setup — Export a survey to GeoPackage and get a ready-made QGIS project alongside it: layers already styled, photos previewed in the map tips. Open the project and your fieldwork is there.
• Multiple Formats — Also exports Shapefile, GeoJSON, KML and GPX, plus Excel coordinate sheets, for ArcGIS and other GIS software.
• Georeferenced Rasters — Import GeoTIFF and GeoPDF files; they are tiled once on import and drawn offline like any basemap.
• MBTiles Support — Import offline map packages in MBTiles format for areas without network coverage, and add your own XYZ/TMS tile services.

PROFESSIONAL TOOLS
• Form Designer — Build reusable field forms in a visual editor or paste a one-line-per-field CSV definition; start any new layer from a form.
• Reference Layers — Overlay GeoPackage, Shapefile, GeoJSON, KML/KMZ, GPX and spreadsheet layers on the map, with identify and snapping.
• Coordinate Systems — View coordinates in decimal degrees, DMS, and UTM formats.
• Session Management — Organize work into discrete survey sessions with start/end timestamps and statistics.

FREE VERSION
Install and start surveying — no account, no trial countdown, no payment details up front. The free version includes one survey and up to 100 objects (points, lines, polygons, and standalone photos and videos). Everything else is included at no cost: full export and the QGIS project, survey forms, reference layers, offline maps and georeferenced images, geofences and landmarks. Your data is never locked in — export works on the free version.

FULL VERSION
The full version removes both limits: unlimited survey sessions and unlimited objects. Monthly or yearly subscription, cancel anytime in Google Play. Current prices are shown in the app.

PRIVACY & SECURITY
Your survey data is stored locally on your device. We prioritize privacy — your coordinates, photos, and project files remain under your control. See our Privacy Policy at https://spatialize.dev/tavak/privacy

SUPPORT
Questions or feedback? Contact us at support@spatialize.dev

PERMISSIONS EXPLAINED
• Location (precise & background) — Required for GPS track recording and geofencing.
• Camera — Required to capture geotagged site photos.
• Microphone — Required when recording videos with audio.
• Storage (Android 12 and older only) — Required to save exported survey files.
• Notifications — Required for geofence arrival/departure alerts.