Crafting Apps with Purpose

Solo developer creating thoughtful iOS and Mac apps that solve real problems for real people.

Explore Products Learn More

Apps

Thoughtfully designed tools for iPhone, iPad, and Mac

Mahjong Metrics

iOS · Coming Soon

Track every hand. See every trend. Log your American Mahjong wins and losses in seconds, then watch your win rate, hot hands, and session stats update instantly.

  • ✓ Built for NMJL card players
  • ✓ Special-win tracking — jokerless, self-picked, concealed
  • ✓ Time, hands, sessions & special-wins reports
  • ✓ Import/export hand configurations
  • ✓ No ads. No sounds. iPhone + iPad.
Get Notified

Features & Plans · Privacy Policy · Terms of Use

Rack Star

iOS & Web · Coming Soon

Master American Mahjong skills with bite-sized, 1 to 5 minute interactive drills. Build lightning-fast tile recognition, decode card lines, evaluate dealt hands, and navigate the Charleston with table-winning confidence.

  • ✓ Built for NMJL card players
  • ✓ 4 Skill Tracks: Read Tiles, Read Card, Pick a Hand, Charleston Simulator
  • ✓ Chinese numeral trainer (一 to 九) with spaced repetition
  • ✓ Charleston engine with AI opponents and pass analysis
  • ✓ No ads. No sounds. Deliberate table practice.
Get Notified

Features & Plans · Privacy Policy · Terms of Use

About Shynnergy

Hi, I'm a solo developer passionate about building apps that solve real problems for real people. Every product I ship focuses on simplicity, speed, and doing one thing genuinely well.

From iOS trackers to Mac productivity tools, I believe software should feel natural to use and earn its place on your device.

Get in touch