Tarot Ping — Cute Pastel Mascot Deck Tarot Reading App
The cute-deck edition of our tarot app, with 78 hand-drawn pastel mascot cards and 12 themes, now on Google Play and Apps in Toss
En-home
Fadongkwon Soft
A solo developer building small apps after work — and writing down what the process actually taught me.
Three things live here. A tarot dictionary covering the meaning of all 78 cards, written from the traditional Rider–Waite imagery with artwork drawn for the apps. Notes on learning apps I built for my own children, and the study material I gathered along the way. And development records — store reviews that rejected me, platform policy differences, and how one person keeps a dozen apps alive.
Everything here is also available in Korean. Use the language links in the sidebar to switch, on any page.
Tarot Fortune — One-Card Tarot Reading App for 12 Themes
A one-card tarot app with 78 cards and 1,872 upright and reversed readings across 12 themes, now on Google Play and Apps in Toss
When to Start Teaching Hangul — Readiness Signs and Two Methods
The readiness signs that tell you a child is ready to learn Hangul, and how the whole-word and letter-based methods actually differ.
What I Learned Shipping 8 Apps as a Solo Dev with a Day Job
Eight apps built after work, and what actually went wrong — review rejections, yearly API bumps, and why releasing takes far longer than building
Math Monsters — A Math Practice Game Where Kids Catch Monsters
Addition, subtraction, multiplication and division drills for kids, wrapped in a game where every correct answer catches one more monster.
Hangul Monsters on Apps in Toss — Korean Listening Game, No Install
The kids' Korean learning game Hangul Monsters is now an Apps in Toss mini app, so it opens straight inside the Toss app with nothing to install.
Nursing Assistant Mock Exam — 2,400+ Original Practice Questions
A mock question bank for Korea's national nursing assistant exam, with 2,400+ original questions, explanations, timed CBT tests and wrong-answer notes.
Hangul Monsters — A Listen-and-Speak Korean Alphabet Game for Kids
A Korean learning game for kids that covers consonants, vowels, syllables, words and sentences, all voiced by native-quality neural speech.
Two New Mini-Games — Reaction Challenge & Memory Cards
The first two titles in my lightweight mini-game series for Android — a reaction time test and a card matching game, both about 2MB and fully offline.
Apps in Toss Launch — Saju Lotto, Juice Spinner & Spin the Bottle
Three of our Android apps are now Toss mini apps you can open inside Toss with no separate install — Saju Lotto, Juice Spinner, and Spin the Bottle.
Saju Lotto — Lucky Lottery Numbers from Your Korean Birth Chart
An Android and Toss mini app that turns your birth date and time into a fixed set of lucky lottery numbers, with Lotto 6/45 and Pension Lottery presets.
Juice Spinner — A Cute Fruit Roulette Party Game for Android
A free fruit roulette game for parties and family nights, with 9 fruits to pick from and room for up to 12 players in a single spin.
Solo App Developer TO-DO List — What's Done, What's Left
The running checklist for my one-person app studio, from business registration to store listings and ads, with what each step costs. As of 2025-03-16.
Spin the Bottle — A Simple Party Drinking Game for 2 to 12 Players
A free bottle-spinning game for drinking nights and parties, with 9 bottles to choose from, support for 2 to 12 players, and 7 languages.
The Road to My First App Launch — Business, Domain, Site and Costs
Why I started building apps after work as a one-person studio, how I named the business, chose a domain, built the site, and what the first year costs.