A signature, not a factory.

Antonio Apps is a small studio. That is an advantage: you talk to the person who designs and builds, without layers of middlemen.

Talk about your project

Principles

How I think about software.

I am Antonio Sánchez, an Android developer in Peru. I started building apps to solve nearby problems: a credit notebook for a small shop, a public tender radar for someone selling to the government. That is still the starting point: understand the problem before choosing the technology.

I work with Kotlin, Jetpack Compose and a local-first architecture. I care about products that work on a mid-range phone, with intermittent internet and data that matters. I also integrate AI when it solves something real, not when it is a box to tick.

Local-first

The app works offline. The cloud is a convenience, not a requirement to record a credit sale or check a tender.

Data under control

Minimal permissions, private storage and zero ads. If the product does not need a piece of data, we do not ask for it.

Author's finish

Every screen, word and transition has a reason. Detail is not decoration: it is respect for the person using the app.

Maintainable code

Clear architecture, tests where they matter and documentation so the product does not depend on one person.

Tools

The stack, without religion.

I use what solves the problem. These are the tools I work with almost every day.

Android

Kotlin
Jetpack Compose
Material 3
Room
WorkManager

Backend

Supabase
PostgreSQL
Edge Functions
Firebase

Web

Astro
TypeScript
Tailwind CSS
Cloudflare

AI

OpenAI
OCR
Classification
Automation

How I work

Direct, documented and no smoke.

I speak clearly from day one: what can be done, what cannot and what it costs.
I deliver something you can install and test every week.
I document decisions so the team can continue without me.
I prefer long relationships over projects that are forgotten a month later.

Let’s talk

Do you have an app in mind?

Tell me what you want to build, for whom, and what has to happen for it to be worth it. I reply within 1–2 business days.

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