Sumiyomi
Furigana, OCR, speech, flashcards, and private sync.
Independent developer in Japan
Huang Codes
Quiet, practical apps for everyday work, learning, and personal routines.
Apps
Less noise, more utility. These are the products I maintain or am preparing to ship.
Pinyin Scholar
Add pinyin to Chinese text, scan, listen, and export study material.
Opening Ledger
Estimate revenue, margin, profit, break-even, and payback before opening.
Peach Kegels
A 1-minute local habit app with reminders, streaks, and stats.
Hydropace
Track hydration with gentle reminders, iPhone widgets, and Apple Watch quick logging.
WorkHours
Track work hours, overtime pay, reminders, and reports locally.
ReceiptCropper
Crop, straighten, enhance, and save clean receipt or document photos.
Mistake Board
Record small mistakes, reflect gently, and turn next actions into prevention cards.
Kana Typing
Practice katakana romaji typing with pronunciation, review, and local learning statistics.
FoodClock
Track food dates and local reminders, record consumption and waste, and forget less.
Aliveness
Record small moments, revisit your calendar, and create personal reflection cards.
PhotoStamp
Make souvenir stamps from photos, continue editing locally, and share for free or unlock larger exports.
More coming soon
New ideas are in progress. Stay tuned!