Make your app improve itself.
We build your mobile app and the AI workflow that keeps improving it. Ask for a fix in plain language and get a tested build on your phone, with a senior engineer behind every release.
An app is never finished.
Customers notice every bug. Every fix and every improvement waits for a developer.
Hiring developers is a big commitment before the work justifies it. An agency puts layers between you and your app. triplefive is the third way: your team asks for changes, an AI workflow makes them and a senior engineer runs it all.
Start wherever your app is today.
Build a new app
We architect and build the app, its backend and the integrations it needs. The AI workflow ships with it, so your team is asking for improvements from launch day.
Equip your existing app
No rewrite. We read your codebase, tests and release process, then point the workflow at the first fixes. It takes on more as its results earn your trust.
We build in React Native: one codebase, both app stores, native code where it counts.
From feedback to a build on your phone.
One workflow, set up for your app and the tools your team already uses.
Your team
Says what to fix or build, answers product questions and checks the result works for the business.
The AI workflow
Reads the codebase, makes the change, runs the tests and sends a build to try.
triplefive
Sets up and runs the workflow, takes on the work it can’t handle and widens what it can as it proves itself.
Say what needs to change
Report a bug, forward a customer email or describe an improvement, in the tools you already use. The workflow turns it into a task and asks if anything is missing.
Your teamMake the change
The workflow reads the codebase and makes the change within limits we’ve agreed. Product questions go to your team. Technical ones come to us.
The AI workflowCheck it
Automated tests and code review run before anything reaches you. Anything that fails, or needs judgement, goes to an engineer.
The AI workflowTry it on your phone
You get a test build and a plain-language note on what changed. Try it, give feedback, approve it. Then it ships.
Your teamBring in an engineer
When a task is too big for the workflow, or can’t be verified reliably, triplefive takes it on with the context already gathered.
triplefiveKeep what you learn
Decisions, instructions and lessons from finished work are kept, so the next change starts smarter than the last.
The AI workflow
No engineering team required.
No developer to chase. No agents to supervise. No code to read.
Seven years and ten-plus shipped apps, with the backend, AI features and store delivery around them. The workflow is built from that experience.
10,000+ users. Long-term product engineering.
Architecture, release pipeline and delivery to both stores. Ongoing.
Our own product. App, backend and AI, end to end.
Full-stack build of the web platform.
You email the engineer who ships your app.
triplefive is a one-engineer studio in Sweden. No account manager in between: the engineer who sets up the workflow is the engineer who runs it.
Alvar Aronija
You work directly with Alvar, a senior mobile and product engineer with more than ten iOS and Android apps shipped over seven years. The products above are part of that record, used by hundreds of thousands of people.
That experience is in the workflow: how your app is built, how it’s tested, how it reaches the store and when the workflow should stop and ask your team. The same workflow runs in production today on Gymply, triplefive’s own app.
Your team keeps improving your app, with the same engineer behind every release.
Start with one fix.
We start with your app, your priorities and the way your team works today. Nothing about how you run the business changes.
For an existing app, the first fixes come from your own backlog. The workflow proves itself on real work, not a demo.
For a new app, we build the workflow alongside the first release, so it is in place on launch day.
Together we agree what the workflow handles on its own, what an engineer checks and how your team judges the result. Then the scope grows.
Tell me what your app should do next.
Send a few lines about your app and what’s slowing it down. I’ll reply with where I’d start, and what it takes for your team to run it from there.