KL Kevin Lewis Technology • Games • Web Apps

Pin-Sighter

A bowling scorekeeping and performance tracking app built to help bowlers log games, review frame-by-frame results, and analyze trends across practice, leagues, and tournaments.

Launch Web App →
Status Live

Published web app, in active use for real league and tournament tracking.

Build Type Solo

Personal bowling analytics project, design through build.

Primary Focus

Bowling data, local-first workflows, performance reports, saved sets, and score analysis.

Project Overview

Purpose: Pin-Sighter helps bowlers keep structured records of games, sets, equipment, lane conditions, patterns, and performance trends.

Problem: Bowling data is usually scattered across memory, paper notes, screenshots, or basic scoring apps. Pin-Sighter organizes those details into a reusable tracking system.

Approach: The app combines frame-by-frame logging, saved set history, bowler management, pattern tracking, and exportable reports in one local-first workflow.

Preview

Pin-Sighter Home dashboard showing games logged, average score, high game, strike rate, recent sets, and recent scores
Home dashboard: games logged, average score, high game, strike rate, recent sets, and a recent-scores trend line.
Pin-Sighter Log Games screen showing a frame-by-frame scorecard and the second ball pin deck for a spare attempt
Log Games: frame-by-frame scoring, a pin deck for the second ball, and per-frame shot detail like ball, board, and arrow.
Pin-Sighter Patterns list showing the locked Unknown default pattern, a custom pattern, and a saved 2025 PBA Wolf pattern
Patterns: saved oil patterns with length, volume, ratio, and notes, plus a locked default for unknown conditions.

Core Features

Feature setEverything the app covers, grouped by area.
CategoryIncludes
Game Logging
  • Open, league, and tournament sessions
  • Individual games, sets, and multi-game blocks
  • Frame-by-frame results
  • Strikes, spares, opens, splits, and spare leaves
  • Lane, pattern, ball, and game notes
  • Singles, team formats, and Baker-style games
Bowler Management
  • Bowler profiles
  • Handedness and bowler details
  • Bowling ball entries per bowler
  • Ball brand, surface, layout, and notes
Centers + Patterns
  • Bowling center entries
  • Lane count and center notes
  • Oil pattern entries
  • Pattern length, volume, ratio, and notes
Leagues + Tournaments
  • League and tournament entries
  • Event type, format, schedule, and center
  • Dashboard, standings, and scoring links
  • Event-specific notes
Stats + Reports
  • Performance summaries across saved games
  • Filters by bowler, event, center, pattern, ball, lane, set, and game
  • Strike, spare, open, split, and clean-frame trends
  • Spare leave and conversion analysis
  • Targeting and board progression
  • Saved sets and scorecards
Export + Backup
  • HTML reports
  • Printable and PDF-ready reports
  • CSV exports
  • Excel-compatible exports
  • App data backup and restore tools

How It Works

App workflowFour steps, from setup to analysis.
StepWhat happens
01 · SetupAdd bowlers, centers, equipment, patterns, leagues, and tournaments.
02 · LogRecord game details, frame results, spare leaves, targeting, lanes, and notes.
03 · ReviewSave multi-game blocks and revisit scorecards, event context, and ball usage.
04 · AnalyzeUse filters and reports to evaluate performance across bowlers, centers, patterns, and equipment.

Tools + Build

ReactTypeScriptViteTauriCSSLocal StorageFile-backed Local DataVitestPlaywrightHTML ReportsCSV ExportExcel-compatible ExportLocal-first WorkflowDashboard UIReport Generation

Local-First Data

Pin-Sighter is built around local data storage. Bowling data is intended to stay on the user's device unless they manually export it or share a backup file.

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