PUM Lite is a digital journal designed for solo roleplaying and creative storytelling. Whether you are journaling a custom campaign, playing D&D by yourself, or using the built-in Plot Unfolding Machine ruleset, PUM Lite is your perfect mobile companion.
The Plot Unfolding Machine (PUM) enables you to play tabletop Role Playing Games by yourself, for creative writing, world building, and solo storytelling. Create immersive adventures on the fly using your imagination, a structured plot framework to guide your pacing, and a set of random prompts (oracles) that provide an endless source of inspiration.
YOUR VIRTUAL GAMEMASTER
PUM Lite includes built-in digital tools for the Plot Unfolding Machine (PUM) solo engine. No preparation required—just roll, write, and play! Whenever you need a twist, a scene idea, or a Yes/No answer, use the Oracles or the Plot Beat buttons to let PUM drive your story forward:
- Random prompts: Get instant scene hooks that automatically pull in your active characters, locations, and world elements.
- Modify proposals: Propose your scene idea and let PUM add a random twist (like "Make the location less favorable") to keep your game unpredictable.
FEATURES
- Unlimited Stories: Create and write as many campaigns, characters, and locations as you want with zero limits.
- Interactive Story Journal: Keep a clean, chronological log of your adventure with inline dice rolls and oracle results.
- Built-in Oracles: Ask Yes/No questions (Deterministic, Subjective, or Conversation), roll Quantifiers, or generate Descriptive details.
- Curated Plot Tracks: Pace your adventure using curated tracks (Standard, Dungeon, Journey, Heroic, Survival, and more) to guide your story to a climax.
- Active Plot Nodes: Track World Elements, Potential Problems, Useful Findings, and Pending Questions. Mark them as Plot Nodes so PUM can actively invoke them during play.
- Custom Random Tables: Create simple and weighted random tables, or import community tables.
- PDF Export: Export your complete campaign log as a beautifully formatted PDF.
- Mobile & Tablet Optimized: Lightweight, offline-first, and designed for comfortable touch-typing and quick play sessions.
PLAY ANYWHERE, PRIVATELY, AND OFFLINE
PUM Lite is 100% free, private, and offline-friendly. There are no ads, no trackers, and no internet connection is required to play. Your save games remain entirely on your device.
UPGRADE TO PUM COMPANION
PUM Lite save files are 100% compatible with PUM Companion, the premium edition of the app:
- SUM and GUM oracle systems for deeper simulation
- Interactive character sheets and world maps with tokens
- Multiple log spaces and multi-tab journals per entity
- Google Drive and iCloud cloud synchronization
- Advanced random tables with nested rolls and macros
- Voice notes, image editing, and PDF sheet extraction
Note: For the best experience, we recommend using the Plot Unfolding Machine rulebook (sold separately), especially if you are new to solo roleplaying and improvised storytelling.
We hope PUM Lite helps you write incredible stories!
Credits: Saif Addin Ellafi (JeansenVaars), Jeremy Franklin, Maria Ciccarelli.
Unfolding Machines @ Copyright 2026
