Cuaderno de Deudas
Closed betaYour credit notebook, on your phone.
Track credit sales, payments and debts. Know who owes you, even offline.
- Customers and balances
- Credit and payments
- Daily close
View appAndroid · 6 screens
Software & AI studio · Peru
Software and AI for the real world.
We design and build Android apps that work in the real world: offline, with sensitive data and on mid-range phones. We also build our own products.
- Native Android
- Local-first
- Made in Peru
In beta
Kotlin · Jetpack ComposeOffline-first · SupabaseIA aplicada · ProductoLima, Peru
Our apps
Products we use every day.
Two apps in development, built with the same obsession: they should work without depending on the cloud, take care of data and feel good to use.
Radar de Licitaciones Perú
In developmentThe public tenders that matter to you, in one place.
Find Peruvian public tenders, review the terms and track each process through to payment.
- Search and filters
- Terms summary
- Requirements checklist
View appAndroid · 6 screens
Services
From the problem to the product in your pocket.
We work with teams and businesses that need a well-built app, not a demo. These are the ways we can work together.
01
Custom Android apps
Native apps with Kotlin and Jetpack Compose, designed for real phones: mid-range devices, limited battery and spotty connections.
- Kotlin + Compose
- Offline-first and sync
- Material 3 and accessibility
- Google Play publishing
02
Applied AI
We integrate language models, OCR and classification into concrete workflows. No pretty demos that never reach production.
- Assistants and automation
- OCR and data extraction
- Classification and summaries
- Evaluation and cost control
03
Product design
Research, flows and UI before writing code. Prototypes you can test with users, not just present.
- Flows and information architecture
- Wireframes and high-fidelity UI
- Clickable prototypes
- Design system
04
Web and cross-platform
Fast sites, dashboards and APIs that support the app. Astro, TypeScript and services that earn their place.
- Static sites and PWAs
- Dashboards and APIs
- Supabase integration
- SEO and performance
05
Maintenance and audits
We review existing apps: performance, security, technical debt, accessibility and migrations that feel scary.
- Technical audit
- Performance and crashes
- Security and permissions
- Migrations and upgrades
Not sure where to start?
Tell me the idea and we will shape it together.
A 20-minute call is usually enough to know whether it makes sense.
How we work
A short process, no smoke.
Four stages. Visible deliveries from the first week and documented decisions.
- 01
Discover
We understand the business, the users and the real constraints. What has to happen for the app to be worth it.
- 02
Design
Flows, wireframes and UI. We test the hard decisions before they cost code.
- 03
Build
Kotlin, Compose and an architecture that can grow. Frequent deliveries and installable builds.
- 04
Launch
Beta, measurement, iteration and support. We ship, listen and fix.
The studio
A signature, not a factory.
Antonio Sánchez
Founder · Android developer
Peru · Remote work
Antonio Apps is the studio of Antonio Sánchez, an Android developer in Peru. I build my own apps and client apps with a simple idea: software should solve a real problem and feel good to use.
I work with Kotlin, Jetpack Compose and services that earn their place. Offline isn’t a feature; it’s respect for the user.
Local-first
Data lives on the device and syncs when needed.
Data under control
Minimal permissions, private storage and zero ads.
Author's finish
Every screen, word and transition has a reason.
Documentation
Code and decisions explained so the product survives.
Tools
- Kotlin
- Jetpack Compose
- Supabase
- Room
- WorkManager
- Firebase
- Astro
- TypeScript
- OpenAI
- OCR
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.