The wrong platform choice
Native where cross-platform would do doubles the build and the upkeep. Cross-platform where the app leans on Bluetooth, background work or heavy graphics turns every sprint into a fight with the framework.
Web & mobile application development
Product apps with accounts, payments, notifications and an admin panel behind them — designed, built and released to the App Store and Google Play by one team working UK business hours.
Why app projects slip
The screens are the visible part. Accounts, payments, notifications, offline behaviour, admin tools and app store rules sit underneath — and that is where budgets and timelines usually go.
What a good first release includes
A first version people keep using usually needs fewer features and more of the unglamorous essentials:
Native where cross-platform would do doubles the build and the upkeep. Cross-platform where the app leans on Bluetooth, background work or heavy graphics turns every sprint into a fight with the framework.
Payments that break store rules, missing privacy details, no way to delete an account inside the app, crashes on older devices — late surprises that push the launch date back.
The app ships, but support staff cannot look up a customer, refund an order or change content without a developer running database queries for them.
Patchy signal, expired sessions and slow APIs were never tested, so real users meet endless spinners, lost form data and the occasional double payment.
What we build
We build the app, the API it talks to and the admin tools your team runs it with — so one team is accountable when something needs to change, not three suppliers pointing at each other.
React Native or Flutter for one codebase across iOS and Android, sharing logic with your web app where it helps — the sensible default for most product apps.
Swift and Kotlin when the app depends on device hardware, background processing, demanding graphics or platform features that reach native SDKs first.
Browser-based apps and progressive web apps in React or Next.js — for portals, dashboards and products where an app store download would only get in the way.
Stripe, Apple Pay and Google Pay for physical goods and services, in-app purchases where store rules require them, and renewals and receipts checked on the server.
The API, database and admin tools behind the app — users, content, orders, refunds and reporting — with roles so support staff see only what they need.
Push notifications through Firebase Cloud Messaging and APNs, offline-first data that syncs when signal returns, and live updates for chat, tracking or bookings.
How we work
Seven stages, with app-specific work inside each: a platform decision made on evidence, store rules checked before design, and test builds on your own phone from the early sprints.
We define who the app is for, what it must do on day one, and what it depends on — payments, device hardware, existing systems, offline use — because those decide the platform.
Core journeys and technical constraints
Cross-platform or native, app or web app, and what goes into version one: we make the call with you, in writing, with the cost and trade-offs of each option.
Platform decision and first-release scope
Clickable prototypes tried on real phones, following iOS and Android conventions where users expect them, alongside the API design and data model for the backend.
Tested prototype and API design
Two-week sprints with a demo each time, and test builds installed on your own phone through TestFlight and Google Play testing tracks, so feedback arrives while it is cheap to act on.
Installable test builds every sprint
Automated tests plus manual checks on a spread of real iOS and Android devices and OS versions, poor-network scenarios, accessibility and a payment test plan.
Device test matrix and release sign-off
Store listings, privacy details and review submissions handled for you, then a phased rollout so any problem surfaces with a small group of users first.
Live on the App Store and Google Play
Crash and usage monitoring, updates for each new iOS and Android release, and a roadmap shaped by what people actually do in the app.
OS updates covered and a feature roadmap
Technology
We choose per project and explain the choice. Most product apps start cross-platform; native is there when the app genuinely needs it.
Cross-platform
Native
Web apps
Backend
Payments and messaging
Release and quality
Some products do not need an app at all — a well-built web app can be cheaper to run and quicker to update. If that is you, we will say so before you pay for two store listings.
Use cases
Different products, the same essentials underneath: accounts, payments, notifications, an admin panel and a release process that does not depend on one person.
A focused iOS, Android and web product with sign-up, payments and an admin panel — enough to launch, charge and learn from real users.
Availability, bookings, reminders, deposits and cancellations synced with staff calendars, so the front desk stops managing the diary by phone.
Inspections, deliveries or site visits recorded on a phone with photos and signatures, working without signal and syncing once back in coverage.
Order-ahead, rewards and personalised offers, connected to the till, booking or eCommerce system you already use.
Logging, progress charts, reminders and coach messaging, with personal and health data kept to what the app needs and handled in line with UK GDPR.
An app with poor reviews, crashes on new OS versions or an unsupported stack, rebuilt with existing users, data and store listings carried across.
Relevant work
A selection of client projects related to this work. Each case study covers the brief, the approach and the stack.
All case studiesMobile-first money transfer and card app for a cross-border fintech.
Online pharmacy and lab-test booking app with prescriptions and delivery.
Fitness app for workouts, nutrition logging and progress tracking.
Why Techsleight
No inflated numbers — just how we run projects, and what you can hold us to.
We ask what the software is for before we estimate it — and we will tell you when something should not be built, or should be bought instead.
LLM features, retrieval and automation built with evaluation, guardrails and cost controls, and plain software where that is the better answer.
Design, frontend, backend, mobile, cloud and QA in one team, so nothing falls between suppliers.
UK business hours, estimates in pounds, and a contract with a UK company. Our engineers are based in the UK and India.
A fixed-scope project, dedicated developers or a monthly retainer — and you can move between them as the work changes.
Code, IP, cloud accounts and documentation are yours from day one. We sign an NDA before discovery if you need one.
We stay on for fixes, upgrades and new features, or hand over cleanly to your in-house team with the documentation to match.
FAQs
Straight answers on scope, cost, timelines and how we work. If yours is not here, ask us directly.
Cost is driven by the platforms, the backend and the integrations far more than by the number of screens. A discovery sprint from £2,000 produces a prototype, a platform recommendation and a fixed-price quote for the first release. Ongoing development can then run with dedicated developers from £2,900 a month.
For most product apps — accounts, content, payments, messaging — React Native or Flutter give one codebase for iOS and Android with a native feel, at lower cost. Native Swift and Kotlin make sense when the app depends heavily on device hardware, background work or demanding graphics. We make the call with you in discovery and write down why.
If people use the product occasionally, find you through search or work at a desk, a web app is often the better first step: no store review, instant updates, one codebase. An app earns its place with frequent use, push notifications, offline use or device features such as the camera, location or Bluetooth.
We work in two-week sprints, with installable test builds from early on. A focused first release is typically planned over weeks, not months — an MVP is often in the region of 6–10 weeks — with time for app store review built into the plan. You get a dated plan after discovery.
Yes, but the method depends on what you sell. Physical goods and real-world services can usually be paid for with Stripe, Apple Pay or Google Pay. Digital content and subscriptions used inside the app generally have to go through Apple’s and Google’s in-app purchase systems. Store rules change, so we check them against your model before designing the checkout.
Yes. We prepare the listings, screenshots, privacy details and review notes, and submit under your own developer accounts so the apps belong to your business from the start. If a reviewer raises questions, we handle the response and the resubmission.
Yes, when it is designed for it from the start. We store data on the device, queue changes made without signal and sync them when the connection returns, with clear rules for when two people edit the same record. Adding offline support later is much harder, which is why we ask about it in discovery.
We collect only what the app needs, encrypt data in transit and at rest, keep secrets out of the app bundle, and build consent, data export and account deletion into the product. We can supply technical detail for your privacy notice and DPIA; sign-off stays with you.
You do. Source code, designs, store listings, developer accounts and cloud accounts are all set up under your organisation from the start. There is no ongoing licence fee to keep using what we built.
Apple and Google ship major OS releases every year, and store policies change more often than that. Support covers OS updates, crash fixes and dependency upgrades, plus a feature roadmap based on real usage — or a documented handover to your own developers.
Start a project
Tell us who it is for and what it has to do on day one. We will come back with questions, a view on platform, and what a sensible first release would include.
What happens next
Techsleight Labs is a trading name of Krapton IT Consultancy.
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