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Product Requirements Document - Pottery Diary (US)

Executive Summary

Product: Mobile diary for ceramics/pottery projects (iOS & Android) Target Market: US hobby potters, ceramic students, studio owners Launch Date: Q1 2025 Version: 1.0 MVP

Core Value Proposition

Help makers reproduce results and learn from past firings by tracking every project step (clay → bisque → glaze → firing) with photos, glaze layers, temperatures, cone numbers, and notes.

Key Features (v1.0)

1. Projects (CRUD)

  • Create/edit/delete projects
  • Cover photo, title, tags, status (in progress/done/archived)
  • Gallery view sorted by last updated

2. Process Steps

Six step types with contextual fields:

  • Forming: Basic notes + photos
  • Drying: Basic notes + photos
  • Bisque Firing: Cone (e.g., 04), Temperature (°F/°C), Duration (h:mm), Kiln notes, Photos
  • Glazing: Glaze selection (catalog/custom), Coats (int), Application (brush/dip/spray), Photos
  • Glaze Firing: Cone (e.g., 6, 10), Temperature, Duration, Kiln notes, Photos
  • Misc: Basic notes + photos

3. Glaze Catalog

  • Read-only seed data (25+ US glazes: Amaco, Mayco, Spectrum, Coyote, etc.)
  • Add custom glazes (brand, name, code, finish, notes)
  • Search by brand/name/code

4. Cone-Temperature Converter

  • Orton cone reference (022 → 14)
  • Auto-fill temperature when cone selected
  • User can override auto-filled values

5. Settings

  • Unit system: Imperial (lb/in/°F) or Metric (kg/cm/°C)
  • Temperature unit: °F or °C
  • Analytics opt-in (disabled by default)
  • Data export (JSON)

6. Onboarding

  • 3-screen intro with skip option
  • Explains key features

Technical Architecture

Stack

  • Framework: React Native (Expo SDK 54)
  • Language: TypeScript
  • Database: SQLite (expo-sqlite) - offline-first
  • Navigation: React Navigation v7
  • Photos: expo-camera, expo-image-picker, expo-image-manipulator
  • Build: EAS Build

Database Schema

projects (id, title, status, tags, cover_image_uri, created_at, updated_at)
steps (id, project_id, type, notes_markdown, photo_uris, created_at, updated_at)
firing_fields (step_id, cone, temperature_value, temperature_unit, duration_minutes, kiln_notes)
glazing_fields (step_id, glaze_ids, coats, application)
glazes (id, brand, name, code, finish, notes, is_custom, created_at)
settings (id, unit_system, temp_unit, analytics_opt_in)
news_items (id, title, excerpt, url, content_html, published_at, cached_at)

Key Components

  • Repositories: CRUD operations for all entities
  • Utilities: Cone converter, unit conversions, UUID, date formatting
  • Analytics: Privacy-first abstraction (no-op if opt-out)
  • Theme: Design tokens (colors, spacing, typography)

US-Specific Design

Units

  • Default: Fahrenheit (°F), Imperial (lb/in)
  • Toggle: Celsius (°C), Metric (kg/cm)

Cone System

  • Orton cone numbers standard in US ceramics
  • Support common cones: 022, 021, 020...06, 05, 04...1, 2...6...10, 11, 12, 13, 14
  • Auto-suggest temperatures per cone chart

Copy

  • US-English spelling and terminology
  • Friendly maker vibe, instructive tone
  • Example: "Cone", "Kiln Notes", "Coats", "Bisque Firing"

Accessibility (ADA Compliance)

  • VoiceOver/TalkBack: All controls labeled
  • Dynamic Type: Text scales with system settings
  • Contrast: WCAG AA compliant
  • Tap Targets: Minimum 44×44 pt
  • Focus Order: Logical navigation

Privacy & Compliance

CCPA

  • No personal data collected by default
  • Analytics opt-in (anonymous usage events only)
  • Data export available
  • No data selling or sharing

COPPA

  • Age rating: 4+ (content)
  • Not directed at children under 13
  • No PII collection

App Tracking Transparency (iOS)

  • Not required (no third-party tracking unless user opts in)

Success Metrics (First 60-90 Days)

Metric Target
A1 Activation ≥60% create ≥1 project with ≥1 photo in 24h
R7 Retention ≥30% return in week 1
Feature Adoption ≥50% of projects have glaze + cone/temp
Crash-Free Sessions ≥99.5%

Out of Scope (v1.0)

❌ Social features (likes, comments, sharing) ❌ Multi-device sync / accounts ❌ Recipe calculators ❌ Kiln controller integrations ❌ E-commerce / marketplace

Roadmap

v1.1 (Post-Launch)

  • Project export (Markdown + ZIP)
  • Search/filter by cone/glaze/tag
  • Simple reminders
  • iCloud/Google Drive backup

v1.2 (Future)

  • PDF one-pager export
  • Duplicate project as template
  • Expanded glaze catalog (crowdsourced)

Store Metadata (US)

Title: "Pottery Diary – Cone & Glaze Log" Subtitle: "Track bisque & glaze firings with photos" Keywords: pottery, ceramics, glaze, cone 6, kiln, bisque, studio, clay Category: Lifestyle (alt: Productivity) Age Rating: 4+ Price: Free

References

  • Full PRD: See original document with detailed user stories, flows, and acceptance criteria
  • Orton Cone Chart: Based on self-supporting cone end-point temperatures
  • Glaze Data: Manufacturer specifications

Document Version: 1.0 Last Updated: 2025-01-15 Author: Product Team