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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Clean Up Your Photo Gallery with a Simple Swipe
Phocle is a swipe-based photo cleaner for Android that helps you delete unwanted photos fast and reclaim your phone storage — one card at a time.
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Learn Guitar Chords Faster with This Android App
Guitar Chord Helper is a lightweight chord dictionary for Android with diagrams, synthesized sound, quizzes, and learning stats — perfect for beginners.
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Track Your Blood Pressure Daily with BP Diary
BP Diary is a clean, privacy-first blood pressure tracker for Android. Log readings, spot trends, and share data with your doctor — no account needed.
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I Built a Quiz App to Learn Seotda Hand Rankings Fast
Seotda has 29 different hands—more than poker—and the ranking order isn’t intuitive. I built a quiz app to help anyone learn them through repetition.
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I Built a Noise Recorder to Track My Apartment’s Sound Pattern
A personal noise monitoring tool that automatically detects loud events, tags sound types, and helps you document patterns in your environment.
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I Built a Translation App That Remembers Everything
Translate Recorder auto-saves every translation you make so you never have to re-translate the same phrase twice. Built for anyone tired of repetitive lookups.
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I Built a Quiz App to Finally Memorize T568A and T568B
Tired of forgetting LAN cable color codes? I made a free Android app with 4 game modes to drill T568A/B wiring until it’s muscle memory.
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I Built a Quiz App to Master Poker Hand Rankings
Poker Rank Trainer uses three quiz modes to help beginners memorize hand rankings through spaced repetition—no internet required.
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Promgrammer: Build AI Image Prompts in Seconds
A visual prompt builder with 1700+ organized tags for AI image generation. Browse categories, tap to add tags, and copy — no memorization needed.
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MementoAI: I Built an App That Turns Any Text Into Flashcards
Paste your study notes and AI generates flashcards instantly. Swipe to review, set floating reminders, and share decks with friends. Free to start.