Personal side projects

Android, iOS, AI, EV telemetry, and home automation.

I am Faizal M. Zain, a developer building practical tools in my spare time. This is a small index of the apps and systems I keep shaping after hours.

[email protected] View projects

Current work

Projects

Five projects, shipping and in testing.

Android & iOS · In testing

IONIQ Telemetry

Live 800V battery data for E-GMP electric cars — Hyundai IONIQ 5 and 6, Kia EV6 and EV9, Genesis GV60 — read straight off the pack over a Bluetooth OBD-II adapter. True BMS state of charge, coulomb-counted state of health, cell delta in millivolts, and per-module temperatures, plus automatic trip logging, a DC fast-charge monitor, and a solver that plans charging stops around the battery you actually have. Native Kotlin on Android with Android Auto, native Swift on iOS with CarPlay.

Kotlin
Swift
OBD-II
Android Auto
CarPlay
On-device

Website Join Android testing iOS coming soon

Android & iOS

SpenIt

A cross-platform .NET MAUI expense tracker built around daily logging, summaries, and AI-assisted saving insights.

.NET MAUI
C#
AI insights

Website Google Play App Store

Android & iOS

Kryptos

A zero-knowledge personal vault for sensitive documents, private notes, cards, expiry reminders, and encrypted backup — native Kotlin on Android, native Swift on iOS.

Kotlin
Swift
Zero-knowledge

Website Google Play App Store

Native Android

SpenitAICore

A Kotlin and Jetpack Compose finance app that uses Google AICore, Gemini Nano, and ML Kit for on-device receipt and payslip scanning.

Jetpack Compose
Gemini Nano
ML Kit

Website Google Play

Home lab

Home Assistant

My private smart-home and home lab setup for automation experiments, device control, and day-to-day routines.

Automation
Self-hosted