App development you direct.
We build mobile apps and equip existing ones with AI development workflows. Ask for a change in plain language and get a tested build on your phone, with senior engineering support when needed.
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. Coordinating development takes time away from your customers and your product. triplefive is the third way: your team asks for changes, an AI workflow makes them and an engineer keeps it working.
One real fix, start to finish.
A bug reported on Gymply, triplefive’s own app, one morning in September 2026. Every step below is on the record.
- Reported
- From TestFlight, by a tester
- Diagnosed and fixed
- By the AI workflow
- Approved and merged
- By an engineer
- Elapsed
- One working day
The report
A tester sends feedback from TestFlight: “Reps and weights are not visible”, with three screenshots. That is the whole brief.
Your teamThe diagnosis
Within two minutes the workflow has read the screenshots and the code, named the screen and the component, and written down the likely cause.
The AI workflowThe go-ahead
That afternoon the engineer reads the diagnosis and approves the fix. One label on the report, nothing else to write.
The engineerThe change
Six minutes later a pull request is open: the fix, a test that fails on the old code and passes on the new, and the full suite of 412 tests green. The workflow notes it could not check the screen on a device and asks for a build.
The AI workflowThe checks
Automated code review reads the change and passes it. The workflow has already said what it could not verify on its own: the screen on a real device.
The AI workflowThe phone
The engineer asks for a test build with one comment. It lands in TestFlight 24 minutes later, built from the exact code in the pull request. The engineer opens it on a phone, the one check the workflow could not make, confirms the values are readable and merges the fix under two hours later. Report to merged fix in one working day, with three decisions from a person: approve, build, merge.
The engineer
The report, the diagnosis, the pull request, the test run and the build are all on the record, and we walk you through it on request. This is the workflow we set up for your app.
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.
The engineer
Maintains the workflow, handles the technical exceptions and widens its scope as results prove reliable.
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, an engineer takes it on with the context already gathered.
The engineerKeep what you learn
Decisions, instructions and lessons from finished work are kept, so the next change starts smarter than the last.
The AI workflow
Direct the improvements, not the engineering.
No developer to chase. No code to read. No release you haven’t tried on your own phone.
Start with one fix.
We fit the workflow around the tools your team already uses and agree a simple review process. Then the scope grows.
Equip your existing app
We start with your existing codebase and assess what needs to change. The first fixes come from your own backlog, so the workflow proves itself on real work, not a demo.
Build a new app
We architect and build the app, its backend and the integrations it needs, with the workflow in place on launch day. Your team is asking for improvements from the first release.
Together we agree what the workflow handles on its own, what an engineer checks and how your team judges the result. We build in React Native: one codebase, both app stores, native code where it counts.
Seven years and ten-plus shipped apps, with the backend, AI features and store delivery around them. The workflow is built from that experience and runs in production on Gymply.
10,000+ users. Long-term product engineering.
Architecture, release pipeline and delivery to both stores. Ongoing.
Our own product, and the app the workflow runs on in production.
Full-stack build of the web platform.
Direct access to the engineer responsible for your app.
No account manager in between. Alvar maintains the workflow, handles the technical exceptions and widens its scope as results prove reliable.
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. It runs in production today on Gymply, triplefive’s own app, and the fix above is one of its records.
The workflow makes the changes. Alvar takes over when a change needs an engineer, and every release still gets his review before it reaches your customers.
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.