Notes from a one-person app studio
I’m SiU Ahn. I build small Flutter apps on my own and ship them to Google Play and the App Store. These are the launch stories and the lessons along the way.
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Breakup Remedies Ranks What Actually Helps You Move On
An Android app that ranks breakup recovery tips by how many users say they actually helped, with a no-contact counter, widget, and mood check-ins.
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Doneshare for Android: Split Chores Fairly, Together
Doneshare helps couples, roommates and families see today’s chores, log what they did in two taps, split points fairly and say thanks, now on Google Play.
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WeatherWise: Your Korean Weather and Air Quality, Summed Up
WeatherWise turns Korea’s weather and air quality data into a two-line daily summary, with alerts for rain, fine dust spikes, and official warnings.
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Say It, See It Scheduled: Voice Calendar for Android
Voice Calendar turns a spoken sentence into a calendar event on Android, flagging only the guesses so you fix less and schedule faster.
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I Dropped Claude Code from max to medium. Here’s the Data.
On Opus 5.5, medium finished my requests 2.8x faster than max with only 1.3 points more corrections. What 11,447 of my own Claude Code requests show,…
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Finally, a Break-Even Calculator for Korean Stock Investors
See exactly how far you are from breaking even on your Korean stocks, with averaging-down simulations and savings tracking that speed up recovery.
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Egg Catch Tycoon: A Cosy Idle Game to Collect 30 Friends
Egg Catch Tycoon is a slow, cosy idle game for Android where you hatch eggs, feed friends, and collect all 30 without any pressure.
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Idiom Day: Learn a Korean Four-Character Idiom Daily
Idiom Day serves one Korean four-character idiom a day, with hanja readings, origin stories, streaks, and spaced review to help it actually stick.
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MP3 to Guitar & Ukulele Chords: Turn Any Song Into Sheet Music
Upload an MP3 and get a chord chart, TAB, and backing track for guitar or ukulele. No sign-up, works in English and Korean.
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Now on iOS: Codejup Rounds Up Discount Codes in One App
Codejup, the discount-code aggregator for online shopping and overseas orders, is finally on the App Store after launching on Android first.