Independent Android Developer & Publisher

Thoughtful apps.
Built for real life.

I'm Ly Hoang Vinh. I design, build and publish native Android experiences — from everyday utilities and wellbeing tools to playful casual games. Crafted with Kotlin, Jetpack Compose and a focus on the details that matter.

Explore my apps Explore GitHub
Native AndroidIndependent productsMade with care
15Android apps
in this portfolio
10K+HexToText
Google Play installs
KotlinModern native
Android development
Fresh from Google Play

Latest releases.

Two different experiences, sharing the same focus on useful details and approachable design.

Sleep Planner app iconHealth & fitness

Sleep Planner:
Shift Workers

Plan rest around night shifts and rotating schedules. Keep track of sleep, naps and upcoming work — with a cozy pixel-art companion along the way.

Shift schedulesSleep trackingCozy pixel room
View on Google Play
Fat Cat Run app iconArcade game

Fat Cat Run:
Cute Runner

Race through colorful pixel worlds with a chubby cat. Dodge obstacles, collect fish, chain combos and unlock playful cat styles.

Endless runnerOffline playCat customization
View on Google Play
A long-running utility

A proven everyday tool.

Small products can have lasting value when they solve one problem well.

HexToText app icon
10K+ Google Play installs

HexToText

A fast text-to-hex and hex-to-text converter for developers and curious minds. A straightforward utility designed to get a small job done quickly.

Explore HexToText
Published work

Explore the app collection.

Tools, camera utilities, wellbeing companions and games — all available to explore on Google Play.

Showing all 15 apps
Sleep Planner: Shift Workers iconHealth

Sleep Planner: Shift Workers

Sleep plans and reminders for night shifts, rotating schedules and naps, with a cozy pixel-art companion.

View on Google Play
Fat Cat Run: Cute Runner iconGames

Fat Cat Run: Cute Runner

A charming pixel-art endless runner: dodge obstacles, collect fish and customize your chubby cat.

View on Google Play
Pet Playground iconGames

Pet Playground

Interactive pet playground experience with engaging mini-games and cute companions.

View on Google Play
Jigsaw Puzzle: Pieceful iconGames

Jigsaw Puzzle: Pieceful

Relaxing jigsaw puzzle game with beautiful imagery and smooth piece mechanics.

View on Google Play
Pose & Angle iconTools

Pose & Angle

Camera-first pose and angle guidance for practical photography and positioning.

View on Google Play
HexToText iconTools

HexToText

Fast text ↔ hexadecimal conversion for developers and technical users.

View on Google Play
Anshin Care iconHealth

Anshin Care

A simple medicine-label camera and magnification utility designed for seniors.

View on Google Play
Image To Text iconTools

Image To Text

OCR utility for extracting text from images with editing, history and sharing.

View on Google Play
Angle Camera iconTools

Angle Camera

Professional angle measurement tool using your camera. Level your device and capture precision data.

View on Google Play
Meowake iconTools

Meowake

Cute math mission alarm with interactive challenges for dismissing alarms.

View on Google Play
Freaking Math Plus iconGames

Freaking Math Plus

Fast-paced math challenge focused on quick decisions and short sessions.

View on Google Play
Scan Flat Scanner iconTools

Scan Flat Scanner

A practical scanning utility built around a focused mobile workflow.

View on Google Play
PureSip iconLifestyle

PureSip

Water reminder with progress tracking, statistics and lightweight gamification.

View on Google Play
QR Code Studio iconTools

QR Code Studio

Simple QR creation and scanning utility for everyday use.

View on Google Play
BlinkStretch iconHealth

BlinkStretch

20-20-20 screen-break timer with progress tracking and playful cat rewards.

View on Google Play
How I work

Product thinking.
Engineering discipline.

I enjoy the whole journey from an idea to a published app: understanding the user's need, shaping a focused experience, building a dependable native foundation and improving the details through iteration.

Technologies I use
KotlinJetpack ComposeMaterial 3Coroutines & FlowMVVM / MVIClean ArchitectureHiltRoomDataStoreCameraXML KitWorkManagerGoogle Play BillingAdMob
01 / UX

Clear over complicated.

A straightforward flow, legible interfaces and thoughtful moments that make an app easy to return to.

02 / ANDROID

Native by design.

Modern Kotlin, Compose and platform-aware behavior for responsive Android experiences.

03 / STRUCTURE

Maintainable foundations.

Separated responsibilities, reactive state and architecture that keeps change manageable.

04 / SHIPPING

Ideas into releases.

From implementation to Google Play publishing, with attention to reliability and ongoing improvement.

Open source

Explore the engineering behind the apps.

Browse my Kotlin and Compose work, including an open-source Android architecture template built around MVI and Clean Architecture.

Explore Android architecture template All repositories
Get in touch

Have feedback or an idea?

Questions about an app, feedback on a product or a conversation about Android development — feel free to reach out.

Send an email