Mobile App UI Design Company
Mobile app UI design company — iOS and Android interfaces designed for thumbs, tested on real devices, delivered as developer-ready Figma systems.
HandsOnTech designs mobile app interfaces for iOS and Android — thumb-reachable layouts, platform-native patterns and motion — prototyped and tested on real devices, then delivered as developer-ready Figma files with tokens and specs.
Mobile design fails in the gap between a beautiful dribbble shot and a thumb on a crowded train. We design for the pocket context — reachability, interruption, one-handed use — and test on devices, not desktop previews.
Designed for thumbs, tested on devices
A mobile interface that looks stunning in a portfolio can be unusable on a crowded train: touch targets out of thumb reach, gestures that fight the platform, text that dies in sunlight. We design for the pocket context — one-handed reach zones, interruption recovery, platform-correct navigation on iOS and Android — and we test prototypes on physical devices, not desktop previews. The deliverable is a developer-ready Figma system with tokens, interaction specs and every state defined: loading, empty, error and offline, because real apps live in all four.
One brand, two platforms, zero uncanny valley
Users feel it immediately when an Android app pretends to be an iPhone app or vice versa — the wrong back behavior, the wrong sheet, the wrong ripple. Our approach keeps one visual identity while respecting each platform’s conventions: navigation patterns, system components and motion that feel native to iOS Human Interface Guidelines and Material Design respectively. Store reviewers reward it, users trust it, and your engineers get platform-specific specs instead of a single mockup with “make it work on Android” scribbled in the margin.
Why most redesigns fail
Opinion-driven UI costs twice — once for the wrong design, again to fix what users refuse to adopt.
Stakeholder opinions win
Boardroom taste replaces user evidence. Launch day looks polished; week two shows drop-off nobody predicted.
Handoff breaks the intent
Figma files arrive without edge cases, states or accessibility notes. Engineering improvises — and your brand pays for it.
No baseline metric
Without a number to move — signups, completion, time-to-task — you cannot tell if the redesign worked.
What we design and deliver
Research-backed UX that engineers can build without guesswork.
User research & journeys
Interviews, session review and journey maps tied to the one metric this release must move.
Wireframes & prototypes
Clickable Figma flows tested with real users before a line of production code.
Design systems
Tokens, components and documentation so every screen stays consistent after launch.
Usability & WCAG 2.2 AA
Accessibility and task testing baked in — not a checklist bolted on at the end.
How we design products that ship
Four phases, two-week sprints, evidence at every gate.
Discover
Audit flows, talk to users and agree the success metric before pixels.
Define
Wireframes and prototypes validated with five or more target users.
Design
High-fidelity UI, design system and dev-ready specs with all states.
Validate
Usability tests, accessibility checks and iteration before handoff.
Three ways to engage
Every model starts with a free consultation and a written quote — the price you sign is the price you pay.
Fixed-Price Project
A scoped build with a written price and a launch date — agreed before design begins.
- Written scope and fixed quote within 48 hours
- Two-week sprints with staging demos every other Friday
- Milestone payments tied to shipped work
- 30-day bug warranty in the contract
- Code, designs and content transfer on final payment
Growth Retainer
Monthly compounding work on organic and paid visibility, reported against pipeline.
- Monthly sprint plan agreed in advance
- Live dashboard — the same numbers we see
- AI visibility report: which prompts name you
- No long lock-in — cancel with 30 days notice
- Same team as your build, no handoff loss
Dedicated Team
Senior specialists embedded in your Slack, repo and standups — capacity without recruiting.
- Start within 1–2 weeks of the intro call
- Your tools, your process, your time zone
- Scale seats up or down with two weeks notice
- NDA and full IP assignment from day one
- Direct access — no account-manager relay
Shipped, measured, still running
Live projects with measured results — visit them before you hire us.
BusyHen
A seven-screen booking flow rebuilt to three taps — around how parents actually book.
Ultimate Junk Removal
A brochure site rebuilt as a quote machine with local SEO in the structure, not sprinkled on top.
Angel Care
Rewritten in plain language, WCAG 2.2 AA throughout — and search finally found it.
The stack we ship with
Chosen per project for your team and roadmap — never by our habits.
Design
Frontend
Backend
Platforms
Mobile
AI
What our clients say
“HandsOnTech nailed our new website. The design was stunning, the development flawless, and their marketing lifted our visibility right away.”
“From concept to launch, they delivered. Their development brought a complex application to life and put us in front of exactly the audience we needed.”
“We needed a full brand refresh. They gave us the look, the platform and the growth engine — and the growth engine is still running.”
Who hires us for UI/UX
SaaS founders rebuilding onboarding
Marketing teams with low landing-page conversion
Product leads inheriting legacy UX debt
Enterprises needing WCAG 2.2 AA conformance
30-day warranty
Bugs found in the first month get fixed free — in the contract.
You own everything
Code, designs and content transfer on final payment.
U.S. hours overlap
Standups and demos on ET, CT, MT or PT — your pick.
Fixed price, fixed date
Quoted in writing before work starts. No surprise change orders.
More UI/UX Design services
Explore other capabilities
Common questions
Do you design differently for iOS and Android?
Where it matters, yes. Navigation, system gestures and component conventions differ, and users feel it when an app ignores their platform. We keep one brand language with platform-correct behavior — which is also what App Store and Play reviewers expect.
What do developers receive at handoff?
Figma files with a component library, design tokens for color/type/spacing, interaction specs including motion, and annotated edge cases — empty, loading, error and offline states. Handoff meetings walk your engineers through it; questions during build are answered in your Slack, not ticketed.
What is Mobile App UI Design Company?
Mobile App UI Design Company is a scoped engagement from HandsOnTech — a U.S. design, development and growth studio. We map URL architecture, internal links and schema before build, tie ui/ux design work to one business metric and deliver in two-week sprints with staging demos.
How much does mobile app ui design company cost?
Every project is quoted after a free audit and scope review. You receive a written fixed-price proposal with milestones and timeline within 48 hours — no hourly creep or surprise change orders.
How long does mobile app ui design company take?
Marketing websites typically ship in 4–6 weeks. Web apps and AI dashboards take 8–12 weeks. Mobile apps take 10–16 weeks. Exact timeline is confirmed in your written scope before work starts.
Is SEO included in the build?
Yes — technical SEO is built in from the first wireframe: semantic HTML, Core Web Vitals tuning, Service and FAQ schema, XML sitemap, internal linking and on-page structure. Ongoing SEO and AEO retainers are available after launch.
Built for founders who are done waiting on agencies.
One team. One contract. Working software every two weeks.
Tell us what you're building.
You'll get a plan, a price and a date — usually within two business days. No sales deck, no discovery-call maze.
- ✉️sales@handsontech.ioWe reply within one business day
- 📞(866) 965-8749Mon–Fri, 9am–6pm ET
- 📍2108 N ST STE NSacramento, CA 95816
- ⚡Free website auditRecorded walkthrough back in 48 hours
- 🔒NDA on requestSigned before you share anything sensitive