Mobile app development company
Mobile App Development Company
We build custom mobile apps for iOS and Android — driver and field apps, customer apps, and connected-device companions — designed for real-world use, reliability, and scale.
In production: the driver app behind a live US EV-charging network
Real-device tested — we ship hardware to our engineers, not assumptions
You own the code, the data, the roadmap
Why projects stall
Why mobile app projects stall
Endless planning, no working version
Decisions pile up before anyone can use the app.
A good-looking app no one keeps using
The screens are polished, and the workflow still doesn't fit the job.
Team changes, roadmap resets
Knowledge leaves with the people, and the product starts over.
Works in the demo, not the real world
Signal, devices, and field conditions were never part of the test.
What we build
Mobile apps we build
Driver & field apps
Apps people use on the road, on site, and between jobs.
Connected-device companion apps
BLE and firmware companions, tested on the real device — not only in a simulator.
Customer apps
The product a customer opens, accounts for, and comes back to.
Internal & ops tools
Mobile tools for the people running the operation.
Delivery & logistics apps
Routing, status, and handoff software that has to work away from a desk.
In production
Results from apps already running
600+ screens shipped
Across production mobile products.
90% self-service adoption
Users completing the flow in the app.
Approval time cut from 2 days to 2 hours
A workflow that used to wait on people, now finished in the app.
80% of support handled in-app
Issues resolved where the user already is.
How AI fits our work
AI changed what building software is. We build that way.
Our senior engineers direct AI that writes code underneath them — and they review and own every line that ships. AI accelerates the work; it never decides what's right.
A real starting point on day one
AI turns your vision into a structured SRS, wireframes, and a first working product direction in hours, not weeks — so you're reacting to something real, not a blank page.
The repetitive work, automated
Boilerplate, tests, and documentation are AI-generated and engineer-reviewed — shorter cycles and fewer early bugs.
A principal engineer owns the result
Every change is reviewed in context before it ships. You're never handed raw AI output.
You own what it produces
The SRS, the designs, the code, the docs — all yours.
The result: delivery timelines cut by roughly 40–50%, and fewer bugs in early releases — without cutting corners.
EV charging · US
ChargeOnSite — a live charging platform for large property networks
Bookings, payments, access control, and live monitoring, with OCPP so multiple charger vendors work without hardware lock-in.
Connected devices · under NDA
A companion app tested on the real device
Firmware and BLE companion software, exercised on hardware we ship to the engineers — not on a simulator alone. The client name stays private.
How we work with you
Build, fix, or scale — one senior team
Build
New production software end to end, from first architecture to launch.
Fix & Stabilize
Make what's slow, breaking, or fragile reliable enough to build on again.
Scale & Maintain
Grow and run the system with a senior team that stays on it.
How we start
Start small. Own everything. No lock-in.
Start with a technical review
A senior engineer, often our CTO, finds the real constraint and what's worth building, fixing, or leaving alone.
We scope the piece, not a rebuild
One clear outcome. Your stack, vendors, and team stay.
You own what gets built
The code, the data, the roadmap. No lock-in.
Industries
Deepest in energy, mobility, and data — and mobile apps for operations-heavy businesses of every kind.
Tech stack
iOS, Android, or both
Swift
Native iOS.
Kotlin
Native Android.
React Native / Flutter
One product across both platforms when that is the right fit.
Pricing
Priced to the app
iOS, Android, or both. Scope and terms in writing before engineering starts.
Focused app
$30K–$70K
A defined app with a clear set of flows.
Best for: One job the app has to do well
Talk to an engineerFull product
$70K–$150K
A complete product with accounts, integrations, and the workflows around them.
Best for: A product customers or operators live in
Talk to an engineerEnterprise
$150K+
Roles, security, device integrations, and scale.
Best for: Apps tied into a larger operation
Talk to an engineer
Why 6sense HQ
Why teams choose 6sense HQ
Proven in production
Real systems running today — ChargeOnSite, Peak ETL, and Jeter. 80+ products shipped since 2017.
Senior engineering
30+ full-time engineers, PMs, QAs, and designers. Architecture led by a fractional CTO. 20+ production tech stacks.
Named and verified
Trusted by names like Greystar and Cushman & Wakefield. 99% client satisfaction. 5.0 on Clutch.
Yours, protected
You own the code, data, and IP — assigned under US jurisdiction, no lock-in. NDA before any discussion. Security on every engagement. Milestone-based — you pay for completed work.
Frequently asked questions
Talk to an engineer
Free 30-minute technical review, often with our CTO. No obligation.
