Currently building

Small, sharp apps for the things I care about.

I'm Alvin. I design and ship focused tools — a baseball scorebook that feels like pencil on paper, a planner that stacks habits into goals, and a private ledger for everyday spending. Here's what I've built so far.

The lineup

What I've been building

Invite only iPhone · Web

Scorekeeper

A baseball scorebook that feels like pencil on paper.

Score a game pitch by pitch with a fast Easy Mode, or switch to a classic Standard scorecard rendered in your choice of handwriting. Pull real MLB lineups in a tap, keep scoring offline, and pick it back up on any device.

  • Easy & Standard scoring modes
  • Handwritten, zoomable scorecard
  • MLB starting lineups on demand
  • Offline-first with cloud sync
Request an invite →
Invite only Web

StackUp

Stack small actions into long-term growth.

Organize life into Pillars, Goals, and Habits, then let a deterministic engine suggest your Top 3 for the day. Periods are judged honestly — hit, missed, or skipped — with real streaks, struggling-habit alerts, and an activity heatmap.

  • Pillar → Goal → Habit hierarchy
  • Daily Top 3 suggestions
  • Honest streaks & struggle detection
  • Recurring routines & tasks
Request an invite →
Invite only Web

Personal finance tool

Know what you actually spent.

A private spending and credit-card companion. Split a dinner with friends and your Personal Spend updates instantly; track exactly who still owes you, link refunds and reimbursements, and see true meal costs — with bank sync built in.

  • Personal Spend vs. shared costs
  • Reimbursement & refund matching
  • Labels, collections & people reports
  • Secure bank account linking
Request an invite →

Want early access?

Each app is opening up to a small group. Pick one, request an invite, and I'll get back to you.