Software & Mobile App Development Company in the United Kingdom
Mobile app, web and AI development for UK businesses, backed by a branch in Fleet, Hampshire and an engineering centre in Bengaluru.
- NDA & full IP ownership
- Senior engineers
- Working hours that overlap with United Kingdom
British organisations rarely lack ideas for new digital products; what they lack is engineering capacity at a price the board will approve. Sigmato is a software development company UK businesses can reach locally, with a branch office in Fleet, Hampshire and a full engineering centre in Bengaluru. We design, build and support mobile apps, web platforms and AI systems for founders, scale-ups and established firms in London, Manchester, Birmingham and Edinburgh, and we invoice and contract in pounds sterling.
A UK Branch With an Offshore Engineering Centre
Many UK buyers have been burned by offshore vendors who disappear between invoices. Our model is different: account management and workshops can be run from our Hampshire branch, while the developers, testers and designers who write your product sit in our Bengaluru office. You get a UK point of contact who understands how procurement, budgeting cycles and VAT work here, combined with the cost base of an Indian delivery team.
Because Greenwich Mean Time sits 5½ hours behind India (4½ hours during British Summer Time), almost the whole of a London working morning overlaps with the Bengaluru afternoon. In practice that means a 9:30 stand-up, design reviews before lunch and bug fixes that land the same day, rather than the overnight hand-offs typical of US arrangements.
What We Build for British Companies
- iOS and Android apps: the UK smartphone market is split fairly evenly between iPhone and Android, so most of our British clients launch on both at once using Flutter or React Native.
- Web platforms and portals: customer dashboards, booking systems and internal tools built with React, Next.js, Node.js or Laravel.
- B2B SaaS: multi-tenant products with Stripe or GoCardless billing, role-based access and audit logging.
- AI and automation: document processing, retrieval-augmented assistants and customer-service chatbots trained on your own knowledge base.
- Dedicated developers: Android, iOS, Node.js and React engineers who join your existing team on a monthly rolling arrangement.
UK GDPR, the ICO and Sector Regulation
Since leaving the EU, the UK runs its own data protection regime: the UK GDPR alongside the Data Protection Act 2018, as updated by the Data (Use and Access) Act 2025, all overseen by the Information Commissioner’s Office. For a project delivered partly from India, the points that matter most are:
- International transfers. India has no UK adequacy decision, so any access to personal data from Bengaluru is covered by the ICO’s International Data Transfer Agreement (IDTA) or the UK Addendum to the EU standard contractual clauses, backed by a transfer risk assessment. Where possible we work with anonymised or synthetic test data so production personal data never leaves UK hosting.
- PECR and cookies. Non-essential analytics and marketing cookies need opt-in consent, and the same rules govern marketing emails and SMS.
- Children’s code. Apps likely to be used by under-18s must follow the ICO’s Age Appropriate Design Code, with high-privacy defaults.
- Online Safety Act 2023. Published on legislation.gov.uk, the Act means platforms that host user-generated content need risk assessments, reporting tools and, in some cases, age assurance.
- FCA rules for fintech. Firms regulated by the Financial Conduct Authority must meet Consumer Duty expectations, strong customer authentication and operational resilience requirements, which shape how we design onboarding and payment flows.
- NHS digital standards. Health products selling into the NHS are assessed against DTAC and the Data Security and Protection Toolkit, so we document clinical safety and security from the start.
Payments British Customers Expect
Contactless card payments and Apple Pay are routine in the UK, but checkout design now goes further. We regularly integrate Faster Payments-based open banking (“Pay by Bank”) through regulated providers, Direct Debit for subscriptions via GoCardless, buy-now-pay-later options such as Klarna and Clearpay, and Stripe or Adyen for card processing. For marketplaces, we handle split payouts and VAT-inclusive pricing so invoices satisfy HMRC’s Making Tax Digital expectations.
Sectors We Know Across the UK
- Financial services and fintech in London and Edinburgh: onboarding with KYC checks, open banking dashboards and broker portals. Our guide to fintech app development covers the security side in detail.
- Healthtech and care: patient booking, remote monitoring and care-home staffing apps built around healthcare mobile application patterns.
- Retail and hospitality: Shopify storefronts, loyalty apps and table-ordering systems for high-street and online brands.
- Manufacturing and logistics in the Midlands and the North West: production dashboards, driver apps and warehouse tools.
- Education: learning platforms for universities, training providers and multi-academy trusts.
Indicative Budgets in Pounds Sterling
| Project type | Typical range (USD) | Approx. timeline |
|---|---|---|
| Clickable prototype and discovery | $5,000 – $12,000 | 2–4 weeks |
| Mobile app MVP (iOS + Android) | $25,000 – $70,000 | 3–5 months |
| B2B SaaS platform, first release | $40,000 – $120,000 | 4–7 months |
| Dedicated developer | $2,800 – $5,500 per month | Rolling |
These are indicative figures only; we quote in GBP on request and the final price depends on your scope, integrations and compliance needs. For a deeper breakdown, see our mobile app development cost guide.
How an Engagement Runs
- Mutual NDA and intro call with someone who can talk through commercial terms in UK business language.
- Paid or free discovery, depending on complexity, producing user journeys, a prioritised backlog and a fixed or capped estimate.
- Fortnightly sprints with demos timed for your morning and a shared Jira or Linear board.
- Accessibility and security testing against WCAG 2.2 AA, which public-sector buyers require, plus penetration-test remediation if you commission one.
- Launch, handover and support, with all code in your repositories and full IP assignment under a contract governed by English law.
If you are weighing up models, our comparison of staff augmentation, outsourcing and in-house teams may help.
Frequently Asked Questions
Is it legal to send UK personal data to developers in India?
Yes, provided the transfer is covered by an approved mechanism such as the IDTA or UK Addendum and a transfer risk assessment. We sign these as part of the contract and keep production data in UK cloud regions wherever we can.
Can we meet your team in person?
Yes. Our branch in Fleet, Hampshire is within easy reach of London and the M3 corridor, so kick-off workshops and milestone reviews can happen face to face.
Do your prices include VAT?
Our quotes are shown before VAT. How VAT is applied depends on which Sigmato entity contracts with you and on your own VAT status, and we confirm this in writing before you sign.
Will our app be accessible enough for public-sector tenders?
We design and test to WCAG 2.2 AA and can prepare the accessibility statement that UK public-sector bodies must publish under the 2018 accessibility regulations.
Talk to a Software Development Company in the UK That Delivers
Share a brief, a sketch or just a problem. We will reply within two working days with questions, a suggested approach and a rough budget.