Mobile apps your users keep open, and your CFO keeps funding.
Production-grade iOS and Android apps for founders and product leaders who need to ship — not just demo. Senior engineers, App Store-ready pipelines, and 90-day post-launch support baked in from day one.
Three teams we ship for again and again
We tune scope, team mix, and process to where you actually are — not a generic playbook.
MVP from zero in 10–14 weeks.
You need a credible v1 in users' hands to validate the thesis, raise the next round, or both. We start with discovery, ship a focused MVP, and instrument it so the next decision is evidence-based — not vibes.
- Lean scope defined alongside founders, not against them.
- Production-grade from day one — no throwaway prototypes.
- Analytics and crash reporting wired in before launch.
Native mobile that matches your web product.
You have a working web product and a customer base asking for mobile. We add iOS and Android without splintering your team, sharing your API contracts, design system, and release cadence.
- Reuses your existing API, auth, and analytics infrastructure.
- Design-system-aware — your brand survives the platform jump.
- Embeds with your engineering team, not around it.
Replace the app your users complain about.
Your current app is on an unmaintained framework, leaks crashes, or fails App Store review. We rebuild on a modern stack with feature parity first, then expand — without losing the institutional knowledge that lived in the old codebase.
- Strangler-pattern migration: ship in slices, not big bangs.
- Backwards-compatible APIs so backend changes lag the rewrite.
- Compliance-aware (HIPAA, SOC 2, GDPR) when your data demands it.
Concrete deliverables, not slide-deck promises
Every engagement ships these — they're not upsells. If something here doesn't apply to your scope, the scoping call is where we say so honestly.
iOS + Android apps
Native (Swift / Kotlin) or cross-platform (React Native / Flutter) — chosen against your team, budget, and platform-feature needs. Not religion.
App Store + Play Store submission
We handle the whole submission gauntlet — provisioning, certificates, review responses, phased rollouts, and store listing copy and assets.
CI/CD pipeline
Fastlane or EAS pipelines for automated builds, signing, TestFlight / internal track distribution, and one-tap production releases.
Analytics + crash reporting
Product analytics (Amplitude / PostHog / Mixpanel), crash reporting (Sentry / Crashlytics), and dashboards your team can read on day one.
Design system + handover docs
Figma component library, design tokens, engineering walkthrough, and runbooks — so the next change doesn't require us in the room.
90-day post-launch support
Bug fixes, store-review pushback, and an SLA on critical issues. We don't ship and disappear — we operate alongside you through the first quarter.
Discover. Design. Build. Ship.
The same four-phase process we run for every engagement — adapted to mobile constraints. Predictable cadence, written deliverables at each phase, no theatre.
Discover
Stakeholder workshops, technical discovery, and a risk-prioritized backlog. We surface unknowns before they become surprises.
- Technical scoping document
- Risk register
- Delivery roadmap
Design
Architecture decisions, system diagrams, and UX prototypes. Engineering and design move in lockstep from the start.
- System architecture
- Interactive Figma prototype
- Data model & API spec
Build
Senior engineers ship in two-week sprints with shared dashboards. Daily standups, weekly demos, written status reports.
- Production-grade code
- CI/CD pipelines
- Test coverage > 80%
Ship
Phased rollouts with feature flags, observability, and on-call rotation. We do not hand over and disappear — we operate alongside you.
- Monitoring & alerting
- Runbooks
- Incident response SLAs
We pick the stack for the job, not the resume
Cross-platform when speed and team economics matter. Native when the platform features or performance demand it. The scoping call is where we make the call together.
React Native
When you want one codebase, fast iteration, and JS/TS team fluency to carry across web and mobile.
Flutter
When you want pixel-perfect custom UI, strong performance, and don't mind investing in Dart for the win.
Swift
When iOS is the priority surface and you need the latest platform features — widgets, Live Activities, ARKit, on-device ML.
Kotlin
When Android is non-negotiable — Material 3, Jetpack Compose, and full access to background and hardware APIs.
A patient platform serving 7M+ users across iOS and Android.
We rebuilt Vital Health's patient-facing mobile app from a brittle hybrid stack onto React Native — feature parity in 14 weeks, then expanded with telehealth, prescription refills, and HIPAA-compliant messaging. Senior engineers operated alongside the in-house team, with App Store releases moving from quarterly to fortnightly.
"We have worked with five development partners over the years. Tackxel is the only one we trust with our patient-facing systems. HIPAA-grade discipline without the enterprise consultancy markup."
Two ways to start — pick the one that fits your week.
Discovery calls are for figuring out if we're the right fit. Estimates are for when you already know the shape of what you want to build and need numbers to bring to the table.