Gunawan Santoso

Gunawan Santoso

Software Engineer in Jakarta, Indonesia

Digital products shaped by clean design and solid engineering — leveraging AI to move faster and build smarter.

Portfolio

A solo-run mobile studio.

39+ apps on iOS and Android — designed, coded, and shipped solo. Alongside years of engineering at Shopee, Gojek, and beyond.

39+
Solo Mobile Apps
8+
Years Building
15+
Client Projects

Projects

Selected work

A collection of apps I've shipped solo to the App Store and Google Play, alongside web platforms built for real businesses.

Daily Diary: Journal & Memories
mobile

Daily Diary: Journal & Memories

Journal for writing, memories, photos & mood — Year in Pixels, On This Day, streaks. 100% offline.

iOSAndroid
DayStack: Daily Planner & Todo
mobile

DayStack: Daily Planner & Todo

All-in-one productivity with todo list, Pomodoro timer, and timebox planner.

iOSAndroid
Money Manager: Expense Tracker
mobile

Money Manager: Expense Tracker

Intuitive finance tracking for better spending decisions.

iOSAndroid
Fasting Track: Fasting Timer
mobile

Fasting Track: Fasting Timer

Intermittent fasting timer & tracker with 17+ plans, schedules, and stats.

iOSAndroid
Kraepelin Test
mobile

Kraepelin Test

Enhance focus and mental agility with Kraepelin testing.

iOSAndroid
Breathe: Calm & Relax
mobile

Breathe: Calm & Relax

Find calm through guided breathing and mindfulness exercises.

iOSAndroid
BrainIQ — IQ Test & Training
mobile

BrainIQ — IQ Test & Training

Test your IQ, train your brain & track your score across 7 cognitive categories.

iOSAndroid
Crossword Master: Word Puzzle
mobile

Crossword Master: Word Puzzle

Daily crossword challenges with 4 difficulty levels, hints, themes & stats.

iOSAndroid
2048 Merge — Number Puzzle
mobile

2048 Merge — Number Puzzle

Classic 2048 with multiple modes, daily challenges, 8 themes & smooth animations.

Android
Luna: Period & Cycle Tracker
mobile

Luna: Period & Cycle Tracker

Understand your cycle through four seasons with daily logging and insights.

iOSAndroid
Time Track: Activity Timer
mobile

Time Track: Activity Timer

Simple stopwatch timer with labels, insights, and activity heatmap.

iOSAndroid
Chinese Calendar: Auspicious
mobile

Chinese Calendar: Auspicious

Discover the richness of traditional Chinese calendar systems.

Android
Micro Habit
mobile

Micro Habit

Build lasting habits through small, consistent daily actions.

Android
QR Scanner: Barcode Reader
mobile

QR Scanner: Barcode Reader

Effortlessly scan and process QR codes and barcodes instantly.

Android
Screen Time: App Usage Track
mobile

Screen Time: App Usage Track

Monitor screen time, set goals, and build healthier digital habits.

Android
Walletly: Money Manager
mobile

Walletly: Money Manager

Track transactions, manage budgets, and monitor multiple wallets in one simple app.

Android
Shopping List: Grocery Planner
mobile

Shopping List: Grocery Planner

Offline grocery lists, pantry tracker, budget — no account, no cloud.

iOSAndroid
Moneto: Money Manager & Budget
mobile

Moneto: Money Manager & Budget

Private, on-device money manager with budgets, goals, debt, assets & net worth.

iOSAndroid
BMI Health: Body Weight Log
mobile

BMI Health: Body Weight Log

Calculate BMI, log weight & track wellness with 16 health calculators — private & offline.

iOSAndroid
LightKit — Flashlight & Tools
mobile

LightKit — Flashlight & Tools

Bright LED flashlight with compass, magnifier, SOS beacon, level, and ruler.

Android
Spinly — Spin Wheel Decision
mobile

Spinly — Spin Wheel Decision

Random spinner wheel, dice, coin, team maker & more decision tools for groups.

Android
Countdown — Days Until Event
mobile

Countdown — Days Until Event

Beautiful countdown timers for birthdays, trips, holidays & every moment that matters.

iOSAndroid
Color Blind Test — Vision Exam
mobile

Color Blind Test — Vision Exam

Ishihara, Snellen, contrast & astigmatism — the complete offline eye test in 2 minutes.

iOSAndroid
Meal Planner & Recipes: Larder
mobile

Meal Planner & Recipes: Larder

Weekly meal planner with 300+ recipes, auto grocery lists & hands-free cooking mode — offline.

iOSAndroid
File Manager & Cleaner: Tidy
mobile

File Manager & Cleaner: Tidy

Honest file cleaner with duplicate finder, storage analyzer, recycle bin & full file manager.

iOSAndroid
Memory Test & Brain Training
mobile

Memory Test & Brain Training

10 scientific memory tests — digit span, Corsi block, N-back, Simon & more.

iOSAndroid
Book Tracker & Reading List: Read
mobile

Book Tracker & Reading List: Read

Track books, time sessions, save quotes — Year-in-Books grid, calendar & 15 achievements.

Water Reminder: Drink Tracker
mobile

Water Reminder: Drink Tracker

One-tap water tracking with smart reminders, 7 drink types & animated water vessel.

iOSAndroid
Speed Test: Internet & WiFi
mobile

Speed Test: Internet & WiFi

Test internet speed against Cloudflare's 300+ servers — 15 seconds, 30-day history.

iOSAndroid
Flashcards & Study: CardFlip
mobile

Flashcards & Study: CardFlip

Spaced repetition flashcards with 4 study modes, streaks & achievements — fully offline.

iOSAndroid
Unit Converter & Calculator
mobile

Unit Converter & Calculator

Fast offline unit converter — 20 categories, 100+ units including BMI and cooking sizes.

Android
Guitar Tuner & Metronome: Tunify
mobile

Guitar Tuner & Metronome: Tunify

Chromatic tuner with one-cent accuracy + tap-tempo metronome, 30+ tunings.

Invoice Maker & Receipt: PDF
mobile

Invoice Maker & Receipt: PDF

Create invoices, estimates & receipts in 2 minutes — 10 templates, 30+ currencies, offline.

iOSAndroid
Weather & Forecast: Breeze
mobile

Weather & Forecast: Breeze

Beautiful weather with animated illustrations, hourly forecast & 10+ home widgets.

iOSAndroid
Personality Test: MBTI TypeMe
mobile

Personality Test: MBTI TypeMe

MBTI, Big Five, Enneagram & Love Language tests in one beautiful offline app.

iOSAndroid
Love Calculator: Compatibility
mobile

Love Calculator: Compatibility

Test love compatibility 6 ways — name, zodiac, birthday, fingerprint, photo & quiz.

Android
PDF Reader & Tools: PDFKit
mobile

PDF Reader & Tools: PDFKit

Read, edit, merge, compress, sign & convert PDFs — 100% on-device, no uploads.

iOSAndroid
TapTally
mobile

TapTally

Tap, tally, track — multi-counter with goals, history & volume buttons.

iOSAndroid
Reaction Time Test & Brain: Reflex
mobile

Reaction Time Test & Brain: Reflex

8 scientific reaction tests — simple, choice, go/no-go, audio, memory & more.

iOSAndroid
Megcheese (PT. Megmilk Snow Brand Indonesia)
web

Megcheese (PT. Megmilk Snow Brand Indonesia)

Corporate landing page with voucher redemption campaign and budget management portal.

Live
Arahin (PT. Navi Arah Vanadium)
web

Arahin (PT. Navi Arah Vanadium)

Import-export platform with 600+ SSG pages, SEO optimization, and content management.

Live
Yours (Professional Permanent Makeup Studio)
web

Yours (Professional Permanent Makeup Studio)

Permanent makeup studio website with service portfolio and academy training programs.

Live
GoFrost (Cooling Solutions Provider)
web

GoFrost (Cooling Solutions Provider)

Industrial cooling solutions website with service portfolio and integrated contact system.

Live
Willylesmana.com (Professional Photography)
web

Willylesmana.com (Professional Photography)

Photography portfolio with custom CMS for content and order management.

Live

Career

Experience

Recognition

Awards

Most Evolving

2024

S-Quantum Engine

Value Star Award

2023

Shopee Indonesia

2nd Place, Hackathon

2017

Bina Nusantara Computer Club

Finalist, Hackathon

2016

FIT Competition UKSW

2nd Place, Web Design

2015

SMAK 5 Penabur

1st Place, Web Programming

2014

SMAK 7 Penabur