Projects

Selected work

Products we have designed, built and shipped — boards, firmware, apps and the services behind them. Each one runs on its own site.

The revvit.app home page

Revvit

Fleet · IoT

Rent out ATVs and scooters without handing over a key.

A rental platform for fleet operators. Riders unlock a machine from their phone, rentals start and bill by the minute, and every unit reports GPS, fuel and telemetry back to the operator — no deposits, no paperwork, no key exchange.

  • Mobile app
  • Operator dashboard
  • Cellular telemetry
revvit.app
The keyvo.app home page

Keyvo

Hardware · BLE

Leave the key at home.

A Bluetooth Low Energy ignition switch that replaces the key switch on ATVs, motorcycles and scooters. Starts on proximity or from the app, pairs over an encrypted connection, keeps its settings on the device rather than in a cloud, and updates over the air.

  • PCB design
  • Zephyr firmware
  • iOS & Android
keyvo.app
The hardstack.com home page

HardStack

Developer tools · Hardware CI

Your bench, operated from anywhere.

Instrumented electronics benches in our lab, rented by subscription and driven over an API, a web app or by AI agents. Flash firmware, orchestrate scopes and logic analysers, drive robotic actuators, and watch it all on live video — from your desk or from CI.

  • Instrument orchestration
  • Live video
  • Agent & CI APIs
hardstack.com
The cual.to home page

Cualto

Fintech · Stealth

Estamos construyendo algo grande.

A stealth fintech project for Latin America, launching first in the Dominican Republic. In development — more soon.

  • In development
cual.to
The szstuff.com home page

SZSTUFF

Guide

Practical links for people who just got to Shenzhen.

A curated directory for new arrivals in Shenzhen — the first 72 hours, paperwork, transport, money, health, housing, food and community — plus a reminder before your visa runs out.

  • Web
  • Reminder service
szstuff.com

Contact

Tell us what you're building

A board that needs firmware, an app that needs a board, a wallet that needs auditing, a model that needs somewhere to run — if it is one of our five disciplines, we would like to hear about it.