Location-based apps are everywhere in the UK: the food delivery app that knows your street, the parking app that finds your bay, the running app that maps your route, the property app that shows what is for sale around you. Location is one of the most powerful features a mobile app can have — and one of the most technically demanding to get right.
This guide walks through how to create a location-based app: the decisions you need to make before writing any code, the technical building blocks, the UK-specific legal requirements, and the mistakes that sink these projects. It is written for founders and product managers, not for developers — though your developers will thank you for reading it first.
Start with the use case, not the map
"An app with location" is not a product. Before anything else, define exactly what location does in your app:
- Discovery: find things near me (restaurants, chargers, properties, parking).
- Tracking: record where I have been (running, cycling, deliveries, field work).
- Geofencing: trigger actions when I enter or leave an area (arrival alerts, clock-in, offers).
- Navigation: guide me from A to B (delivery routes, walking tours).
- Verification: prove I am somewhere (attendance, check-ins, compliance).
Each use case has different accuracy needs, battery implications and legal exposure. Continuous background tracking for a delivery driver app is expected; continuous background tracking for a loyalty app feels creepy and will get your permissions denied. Be precise about what you need and honest about why.
The technical building blocks
Positioning technology
Modern phones combine GPS, Wi-Fi positioning, mobile network triangulation and Bluetooth beacons. GPS is accurate outdoors (a few metres) but slow, battery-hungry and useless indoors. Wi-Fi and network positioning are faster and work indoors but less precise. Beacons give room-level accuracy indoors but require hardware installed at each venue.
Choose the minimum accuracy your use case needs. "Nearest open pharmacy" needs tens of metres; "which shelf am I standing in front of" needs beacons. Over-specifying accuracy burns battery and invites privacy complaints.
Mapping and places data
You will need map tiles and a places database. The main options are Google Maps Platform, Mapbox, Apple MapKit and OpenStreetMap-based solutions. Google is the richest but the priciest at scale — map API bills are one of the classic startup surprises. Model your expected usage against published pricing early, and design caching so you are not paying for the same tile twice. For UK apps, check coverage quality of your chosen provider in your target regions; urban coverage is universally good, rural varies.
Backend and geospatial queries
"Find everything within 2 miles" is a geospatial query, and your database needs to support it efficiently — PostGIS for PostgreSQL, geospatial indexes in MongoDB, or managed services. At scale, naive distance calculations against every record will melt your database. Design for the query pattern from day one: geohash indexing, spatial partitions, and sensible result limits.
Battery and performance
Location is the fastest way to drain a phone battery and earn a one-star review. Best practices: request location only when needed, use the coarsest accuracy the feature allows, batch updates instead of streaming, and stop tracking the moment the task is done. Test on mid-range Android devices, not just the latest iPhone — your users' hardware is worse than yours.
UK legal requirements: get this right from the start
Location data is personal data under UK GDPR, and precise location is sensitive enough to attract regulatory attention. Non-negotiables:
- Lawful basis: usually consent, which must be freely given, specific and informed. Pre-ticked boxes and bundled permissions do not count.
- Purpose limitation: collect location only for the purposes you stated. Using jogging-route data for ad targeting without separate consent is a violation.
- Data minimisation: do not store precise coordinates when a postcode area would do. Do not keep history longer than necessary.
- Platform rules: iOS and Android both require clear permission prompts and privacy disclosures. Apple in particular rejects apps with vague location justifications — your App Store description must explain the benefit to the user.
- Children: if your app may be used by under-18s, the Age Appropriate Design Code adds further constraints on location tracking.
Build privacy into the product — a visible "location is on/off" indicator, easy permission revocation, and a data deletion option — rather than bolting it on after a complaint. For a broader look at budgeting this kind of build, see our app development cost guide for the UK.
The mistakes that sink location apps
- Asking for "always" permission on first launch. Request location in context, when the feature needs it, with a plain-English explanation. Permission granted in context is permission kept.
- No offline story. Tunnels, rural areas, underground stations — UK users regularly lose signal. Cache maps, queue actions, and degrade gracefully.
- Ignoring the indoors. GPS dies inside shopping centres and stations, which is exactly where many location apps are used. Plan your indoor strategy (Wi-Fi, beacons, or honest limitations) early.
- Underestimating map costs. Model API usage at 10x your launch projections. Surprise five-figure map bills have killed startups.
- Building for one platform. Decide iOS-first, Android-first or cross-platform based on your actual audience data — UK market share is roughly iOS-heavy in some segments, Android-heavy in others.
A sensible build sequence
- Validate the use case with a clickable prototype and real user tests — before any backend work.
- Build the core loop first: the single location feature that delivers the value, working end to end.
- Harden the plumbing: offline handling, battery optimisation, error states for denied permissions and lost signal.
- Add the legal layer: consent flows, privacy policy, data retention rules, tested with real users for comprehension.
- Beta in the real world: location apps must be tested in the field — on trains, in basements, in the rain — not just at a desk.
Monetisation and the business model question
Location features are expensive to build and run — map APIs, backend infrastructure, ongoing maintenance — so the business model needs to carry them. Common models: commission on transactions the location enables (deliveries, bookings), subscriptions for premium location features (offline maps, advanced tracking), lead generation fees from nearby businesses, or SaaS pricing for B2B field-workforce tools.
Whatever the model, validate willingness to pay before building the expensive parts. A concierge MVP or a manual-behind-the-scenes pilot can confirm that users value the location feature enough to pay for it — far cheaper than discovering otherwise after a six-figure build. Investors and stakeholders will ask about unit economics early; have the map-API and infrastructure costs modelled per user so the conversation is grounded.
FAQs
How much does it cost to build a location-based app in the UK?
A focused MVP with one core location feature typically runs from the low tens of thousands of pounds; complex apps with real-time tracking, custom mapping and backend infrastructure cost substantially more. Map API usage and ongoing infrastructure are recurring costs on top of the build. Our custom mobile app development team can scope your specific use case.
Do I need permission to track a user's location?
Yes — both the phone platforms and UK GDPR require clear, specific consent before you access location data. You must explain why you need it, use it only for stated purposes, and let users withdraw permission easily.
Should I build for iOS or Android first?
It depends on your audience. Check your market research: UK iOS share is strong among higher-income urban users, while Android dominates overall volume. Cross-platform frameworks can cover both, with some trade-offs in performance and native feel.
How accurate is phone GPS?
Typically 3–10 metres outdoors with a clear sky view; much worse indoors, in urban canyons or bad weather. Design your features around realistic accuracy, not best-case figures.
What is geofencing?
Triggering an app action when a device enters or leaves a defined geographic area — for example, sending an arrival notification or clocking a worker in. It is powerful but battery-intensive and privacy-sensitive, so use it sparingly and transparently.
Location features done well feel like magic; done badly they feel like surveillance. If you are planning a location-based app, talk to our app team about scoping the use case, the tech and the compliance properly from day one.
