Comparison

GK Field Mapper vs Field Sentinel Mapper

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

Head to head
About

GK Field Mapper

This app provides comprehensive mobile mapping tools for surveying, recording GPS locations, and visualizing geospatial data. It supports various data formats, custom styling, and offline functionality, with cloud synchronization for seamless data transfer.

Highlights
  • Survey points, lines, polygons, and benchmarks
  • Log full GPS data and create quickmarks
  • Utilize internal or external GPS devices
  • Load geo-referenced images and vector data
  • Create drawings, measurements, and style data labels
  • Offline functionality and cloud synchronization
Features
Read full description

Handle all your mobile mapping needs with one powerful app. Upload geospatial data, track and record GPS locations, and visualize collected data in map view with ease. GK Field Mapper is designed to meet your mobile mapping needs, offering a comprehensive suite of features. Features: - Survey points, lines, polygons, continuous points, and benchmarks - Log full GPS data for entire fields - Create quickmarks while surveying other features simultaneously - Utilize internal or external GPS devices via Bluetooth or WiFi - Load your own geo-referenced images (.grd, .bmp, .jpg) - View vector data (.shp, .kml, .kmz, .(geo)json, .dxf, .dwg, .gpx, and .csv - Create your own drawings and measurements - Style labels and colors to represent and differentiate your data - Edit and view attribute fields for vector data - View elevation profiles for surveyed GPS logs and lines - Load web imagery from Google/ESRI/Open Street Map - Generate routes to known addresses or features - Offline functionality in remote areas - Automatically sync data online for easy transfer to other devices Subscriptions: - Users that purchase a subscription unlock additional mapping features and gain access to the GK Cloud to seamlessly transfer data between mobile devices, PCs, and/or GK Technology, Inc.’s ADMS (Ag Data Mapping Solution) software. - GK Cloud allows automatic synchronization between mapping files and folders on your field device and your cloud account. - Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. You will be charged for renewal within 24 hours of the end of the current period. - Privacy Policy: https://cloud.gktechinc.com/privacy - Terms of Service: https://cloud.gktechinc.com/termsofservice

About

Field Sentinel Mapper

Features
Read full description

Field Sentinel is a professional geospatial platform for iPhone and iPad, built for teams who work where connectivity is unreliable or unavailable. Whether you support defense operations, emergency response, surveying, construction, aviation, or remote field research, Field Sentinel puts maps, GIS tools, and intelligence workflows on a single device—fully offline when you need it. WORK WITHOUT THE NETWORK • Render offline maps from GeoPackage, MBTiles, and PMTiles • Run spatial queries with SpatiaLite against local feature data • Design and edit schemas, tables, domains, and relationships in GeoPackage • Collect field data with XLSForm-compatible forms and barcode scanning • Import and export KML, KMZ, GPX, GeoJSON, Shapefile, and more PROFESSIONAL MAP & GIS EDITING • Snap-aware vertex editing with split, merge, reshape, and erase tools • Digitize points, lines, and polygons directly on live map layers • Redline annotations, symbols, and labels with GeoJSON/KML export • Terrain analysis including viewshed, slope, elevation, and 3D terrain viewing • GDAL-powered format conversion for raster and vector data ON-DEVICE AI ASSISTANT • AI chat and report drafting powered by local language models • Natural-language spatial queries against your map data • Image analysis for terrain and damage assessment from photos • Document Q&A from PDFs and field documents—processed on your device SITUATIONAL AWARENESS & COMMUNICATIONS • Team Awareness Kit (TAK) client with Cursor-on-Target messaging • GeoChat, mission packages, and live position sharing when connected • Fleet and asset tracking with proximity alerts • Optional integration with TAK Server for team coordination FIELD OPERATIONS MODULES • Surveying: COGO, traverse, leveling, area/volume, and GNSS/RTK support • Construction: earthwork, CAD/DXF overlay, BIM/IFC viewing, and PDF reports • Aviation: FAA charts, airspace layers, TFRs, flight planning, and NOTAMs • Emergency management: ICS/NIMS forms, CAP alerts, and damage assessment tools • Intelligence workflows: GEOINT analysis, change detection, and multi-source fusion BUILT FOR THE FIELD Field Sentinel is optimized for iPad and iPhone in portrait and landscape. Store tile packages, models, and databases on device. Generate professional PDF reports in the field. Use split-screen workspace tools for documents, notes, and annotations alongside your map. Field Sentinel is developed by Tech Maven Geospatial—bringing enterprise GIS, tactical awareness, and on-device intelligence to operators at the edge. Privacy: Core workflows run on your device. Network access is optional and used only for features you enable, such as TAK Server sync, chart downloads, or imagery updates. Questions or enterprise licensing: contact Tech Maven Geospatial.

Screenshots

GK Field Mapper4 screens
Field Sentinel Mapper4 screens

Verdict

The call

The clearest difference is in-app purchases: Field Sentinel Mapper at none against GK Field Mapper's 4. On price, update cadence, ads and device support 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. GK Field Mapper sells 4 in-app purchases, starting at $5.99 per month. Field Sentinel Mapper asks for nothing beyond the download.

UpkeepUpdate frequency

GK Field Mapper ships an update monthly, Field Sentinel Mapper every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard1 real difference · 9 level
GK Field Mapper versus Field Sentinel Mapper: the parameters behind the verdict, then further details
ParameterGK Field MapperField Sentinel Mapper
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size58 MB168 MB
Age rating4+4+
DeveloperGK Technology, Inc.Tech Maven GeoSpatial LLC

In-app purchases

4 purchases

GK Field Mapper

Subscriptions4
  • Standard$5.991 Month
  • Professional Monthly$14.991 Month
  • Professional Yearly$119.991 Year
Show 1 more
  • Enterprise$239.991 Year
None

Field Sentinel Mapper

No in-app purchases

Questions

Is GK Field Mapper free?
GK Field Mapper is free to download, with in-app purchases available.
Is Field Sentinel Mapper free?
Field Sentinel Mapper is free to download, with no in-app purchases.
Do GK Field Mapper or Field Sentinel Mapper have ads?
Neither GK Field Mapper nor Field Sentinel Mapper shows ads.
Which is updated more often, GK Field Mapper or Field Sentinel Mapper?
GK Field Mapper ships an update monthly, and Field Sentinel Mapper every 3 weeks. Most recently, GK Field Mapper was updated on October 24, 2026 and Field Sentinel Mapper on October 25, 2026.

Other comparisons