Field data collection app development for offline GPS surveys, photos, and custom forms
We build custom Android and iOS survey apps that keep working offline, map points, lines, and polygons, and sync clean data to your web GIS. Remote delivery in English, NDA as standard, and full source code handover.
When a custom field data collection app beats a generic survey tool
Paper forms and handheld GPS units still drive a lot of field work, and the real cost appears back at the office: retyping forms, matching photo numbers to records, and redrawing coordinates on a map. Every hand-off introduces errors. A field data collection app moves that whole chain onto the phone, so what arrives at headquarters is already georeferenced, photographed, and validated.
Our survey apps are offline-first by design. Basemaps and reference lists are packaged onto the device as MBTiles or GeoPackage, forms work with no connection, and a sync queue uploads to a PostGIS backend when coverage returns. Surveyors drop points, trace roads or canals as lines, and map field boundaries by walking them, while photos are geotagged automatically and linked to the active record.
To be candid: ODK, KoboToolbox, and ArcGIS Survey123 are excellent tools, and for a standard questionnaire one of them is often the right answer. A custom field data collection app earns its cost when you need your own workflow, such as multi-step verification, reference data pulled from internal systems, richer polygon editing, your own branding, or direct integration with an existing web GIS, ERP, or traceability platform.
Mobile survey solutions we develop
Each app is designed around a real field procedure, then tested in real field conditions.
Land & Farm Boundary Mapping
Walk-the-perimeter polygon capture with area calculation, accuracy filtering, and geotagged photo evidence.
Polygon mappingSmallholder & Supplier Registration
Farmer profiles, land legality documents, and plot polygons for EUDR, RSPO, or ISPO traceability programmes.
Supply-chain traceabilityAsset & Infrastructure Inspection
Condition scoring forms for roads, bridges, drainage, or towers, with photo evidence and offline basemaps.
InspectionsHousehold & Socio-Economic Surveys
Census-style questionnaires with skip logic, repeat groups, and layered validation for research teams.
Survey researchPatrol & Environmental Monitoring
GPS-tracked patrol routes, incident reporting, and ground-truthing of satellite fire hotspots.
Patrol & monitoringSupervisor Web Portal
A web back office to assign areas, review submissions, return records for correction, and export results.
Back officeFeatures of our custom mobile GIS data collection apps
The capabilities field teams ask for most often.
- Fully offline operation with on-device basemaps and reference data
- Point, line, and polygon capture by GPS or on-screen sketching
- Walk-the-boundary polygon mapping with live area and accuracy readout
- Geotagged photos with timestamp, heading, and automatic compression
- Dynamic forms with skip logic, repeat groups, and calculated fields
- Business-rule validation before submission
- Conflict-safe sync queue that survives dropped connections
- Area and task assignment per enumerator
- Supervisor review, approval, and return-for-correction workflow
- Export to Shapefile, GeoJSON, KML, GeoPackage, and Excel
Who needs a custom field survey app
Teams working across large areas, often without reliable connectivity.
Agribusiness & Commodity Traders
Map smallholder plots and collect supplier data to meet deforestation-free sourcing requirements.
Land Administration & Planning
Collect parcel attributes, land-use observations, and ground verification for thematic maps.
Local Government Services
Register businesses, public facilities, and programme beneficiaries on site.
Utilities & Infrastructure Operators
Run routine network inspections with photo evidence and exact coordinates.
Forestry & Conservation
Conduct forest patrols, log incidents, and verify fire alerts on the ground.
Research Institutes & NGOs
Run socio-economic and environmental surveys in remote communities.
One team for the mobile app and the GIS behind it
Field data only creates value once it lands cleanly in your central system.
Mobile and Spatial Backend Together
We build the Flutter, React Native, Kotlin, or Swift app and the PostGIS backend and web GIS it feeds. There is no coordination gap between a mobile agency and a GIS vendor.
Traceability-Grade Data
Building the WebGIS Traceability & Analysis (EUDR) platform for PT Astra Agro Lestari Tbk taught us what polygon quality and attributes deforestation analysis requires. Our field apps are designed so collected data is analysis-ready on arrival.
Honest Tool Advice, Full Ownership
If ODK, KoboToolbox, or Survey123 fits your needs, we will tell you before writing a line of code. When custom is justified, you get the source code, your own app-store listing, and documentation in English.
GIS Projects We Have Delivered
GIS systems we have built and operate for corporations, ministries, and organizations.
Supply Chain Traceability WebGIS
Map-based commodity supply chain tracing built for EUDR compliance.
PT Astra Agro Lestari Tbk · PlantationIGT-PR National Land Geoportal
National-scale thematic land geoportal for Indonesia's Ministry of Agrarian Affairs & Spatial Planning (ATR/BPN).
ATR/BPN · GovernmentRefrigerant & Certified Technician Map
Nationwide mapping of refrigerant distribution and certified AC technicians.
Ministry of Environment · IndonesiaSupplier Due Diligence Scoring
Location-based risk scoring for supplier due diligence.
PT Astra Agro Lestari Tbk · ComplianceLand & Building Valuation GIS
Spatial analysis supporting land and property valuation.
PT Saptasentra Jasa Perdana · PropertyAgrarian Reform Priority Locations
Mapping of agrarian reform priority locations for advocacy and planning.
Konsorsium Pembaruan Agraria · NGOHow we build your field data collection app
Testing in real field conditions is a mandatory step, not an afterthought.
Field Workflow Discovery
We review your existing forms, verification chain, connectivity conditions, and the devices enumerators actually carry.
Reference Data Preparation
Basemaps, boundaries, and lookup lists are prepared and packaged for offline use.
Form Design & Architecture
You approve the form structure, validation rules, PostGIS schema, and sync strategy before build.
App & Portal Development
The mobile app and supervisor portal are developed in parallel with regular demo builds.
Field Pilot & Accuracy Validation
A pilot in real locations checks GPS accuracy, offline stability, battery use, and sync reliability.
Rollout, Training & Support
We publish the app, train enumerators and supervisors remotely or on site, and maintain it after launch.
Our field data collection technology stack
Proven mobile and spatial technologies chosen for low-connectivity field conditions.
Ways to engage us for your survey app
Cost depends on form complexity, platforms, offline mapping needs, and integrations. A free consultation gives you a scoped estimate.
Fixed-Scope Project
For an app whose forms and workflow are well defined. Scope, milestones, and acceptance criteria are agreed up front.
- Mobile app plus supervisor portal
- Field pilot included
- Full source code handover
Dedicated Developer or Team
Our developers support your survey programme for a set period. Ideal when forms change between seasons or project phases.
- Fast form and workflow changes
- Support during survey campaigns
- Post-survey data processing
Maintenance Retainer
Monthly support for an app in active use. Covers Android and iOS compatibility updates and sync server monitoring.
- OS and store compliance updates
- Server monitoring and backups
- Priority help for supervisors
FAQ: Field Data Collection App
How much does field data collection app development cost?
Does the survey app work fully offline?
Should we use a custom field data collection app or ODK, KoboToolbox, or Survey123?
How accurate is smartphone GPS for mapping land boundaries?
How does collected data reach our GIS?
How is survey data secured?
Can you build the app for low-cost Android devices?
Who owns the app, the code, and the data?
More GIS Services from Codeinspira
Each service below can be engaged on its own or combined into a single project.
Explore Our GIS Services
Pick the service that best matches what you need to build.
Ready to replace paper forms in the field?
Send us a sample of your current survey form, and we will propose an app design and a scoped estimate.