Spain

FULLER TECHNOLOGIES SPAIN SL

We build Android apps in Kotlin and take them all the way through Play Console review, staged rollout and the updates after.

  • Android
  • Kotlin & Compose
  • Play Console releases

What we actually do

Android apps written in Kotlin

Jetpack Compose interfaces, offline-first data, background sync that survives Doze and manufacturer battery savers. One codebase, no wrapper around a website.

Play Console release and compliance

Store listing, data safety form, permissions justification, target API upgrades. We prepare the release so review has nothing left to ask about.

Accounts, login and in-app purchases

Email and Google sign-in, session handling, Play Billing subscriptions with restore on a new device. The parts users notice only when they break.

Crash reports read by a human

Crash and ANR dashboards wired up before launch, triaged against real device models, and a patch release when a stack trace earns one.

Spanish and English from day one

Strings externalised, both locales tested on-device, consent and privacy copy written for EU users rather than translated at the last minute.

Ways to work with us

Ask for one of these by name in your enquiry — it speeds up the first conversation.

Most asked for

New Android build

From an idea or a Figma file to a signed release on the Play Store.

  • Kotlin + Jetpack Compose codebase
  • Backend integration or a hosted API
  • Store listing and data safety form
  • Internal and closed test tracks

Release and compliance pass

You have an app; getting it published is the problem.

  • Target API level upgrade
  • Permissions and data declarations
  • Rejection response and resubmission
  • Staged rollout plan

Maintenance retainer

Someone on call for the app you already shipped.

  • Crash and ANR triage
  • SDK and dependency updates
  • Annual Play policy changes
  • Scheduled feature releases

Codebase audit

A written read of what you inherited, before you commit to rebuilding it.

  • Architecture and dependency review
  • Build and signing setup
  • Security and data handling notes
  • Prioritised fix list

Scope and cost are quoted per project after the first call. Nothing here is a fixed package.

How a project runs

  1. You send the enquiry

    A paragraph is enough: what the app should do, who uses it, whether anything exists already.

  2. Scoping call

    We go through screens, data, logins and payments, and say plainly which parts are cheap and which are not.

  3. Written scope and quote

    You get a build plan broken into releases, with what each one contains and what it costs. No work starts before you sign it.

  4. Build in visible increments

    Installable builds on an internal test track as we go, so you are holding the app rather than reading a status report.

  5. Release and hand-over

    Staged rollout on the Play Store, crash monitoring live, signing keys and repository handed to you with the documentation.

Before you write to us

Do you build for iPhone as well?

Our core work is native Android. If you need both platforms we will say so at the scoping call and structure the project around a shared backend, rather than promising an iOS build we would not be the right team for.

Who owns the code and the Play Console account?

You do. The app is published under your developer account where possible, and the repository, signing keys and build configuration are handed over at release.

What happens if Google rejects the release?

We read the policy citation, fix the cause — usually permissions, data safety declarations or a target API level — and resubmit. Handling review back-and-forth is part of the release work, not an extra.

Can you take over an app another team built?

Yes, and the audit exists for exactly that. We read the codebase first and tell you honestly whether continuing or rebuilding is the cheaper road.

Does the app keep working after launch?

Android changes every year: target API requirements, permission rules, SDK deprecations. A maintenance retainer covers those so the app does not quietly stop being installable.

What clients say

★★★★★
We came with a rejected submission and a deadline. They found the data safety declaration that was wrong, fixed it and walked the resubmission through with us.
Marta
★★★★★
The weekly test build mattered more than any report. I had the app on my own phone from the second week and could say what felt wrong early.
Diego
★★★★☆
Straight answers about what would be expensive. They talked us out of one feature entirely, which I did not expect from a development company.
Nuria

Tell us what you want built

A few lines about the app, the users and where it stands today is enough to start.

  • A developer reads your message, not a sales desk.
  • You get a reply by email with questions or a first scope outline.
  • No obligation and nothing is charged before a signed quote.