What is The Dungeon Trainer?
The Dungeon Trainer helps players and Game Masters build better tabletop experiences together. It keeps campaigns organized, gives groups a place to play and share, supports the craft of running a great table, and offers optional AI assistance when a group decides it is useful. People make the choices, relationships, and stories that matter; the platform helps them carry those stories forward.
It is also a training ground, and the parts of it do different jobs: a guided one-shot teaches the play loop itself if you have never played, once and inside a real adventure; Scry prepares the specific session you are about to run; and the Coach drills the craft you already practise. Alongside them it generates everything a table needs, from monsters to portraits to a voice that reads the scene aloud. And when you want a separate solo adventure, an autonomous AI Dungeon Master can run one at any hour, by the rules, with every die rolled in code.
Everything a table needs
Multiplayer tables
Invite friends with a shareable link you approve, or address an invite to someone by username or email and they join on accept. Build a party and play together in real time, with turn coordination and one shared transcript. When the AI is the DM, the table draws from one shared AI-turn budget. Multiplayer is included on every plan.
Friends, profiles, and chat
A friends list with presence, direct messages, and group chats up to 20 people. Public profiles carry showcases and a reaction wall for the characters, art, and moments your campaigns produce, and link-shareable art scrolls let anyone see them without an account.
Run it yourself, no AI
Choose “I am the DM” and the model leaves the chair: you narrate and adjudicate, and the app is the virtual table. Dice, hit points, conditions, rests, death saves, XP, and combat rounds all run in code, with no model call and no draw on your AI allowance. AI roles are opt-in per campaign, so a table that defines none leaves the model out entirely.
A guided first adventure
Start with a ready level 1 character and learn the core play loop inside a complete one-shot. The same campaign view, character sheet, dice engine, and combat tools are used in ordinary play.
Honest dice
Every roll resolves in code, not in the model's imagination. Attack rolls, saves, and death saves trace to a real random number generator, so the table's outcomes are earned, not narrated into being.
An optional AI Dungeon Master
Choose it and the AI narrates, adjudicates by the rules, and remembers what happened ten sessions ago through layered campaign memory. Play solo or with your party. Prefer to run the table yourself? Keep the AI in scoped roles: an NPC, a co-narrator, a rules hand, or none at all.
Scry: session prep
Describe a scene and Scry projects the plausible ways it could unfold, in qualitative bands with complications and prep notes, so a DM walks in ready for the table's best ideas.
The Coach
Self-contained drills for DMs and players: a realistic situation, your call, a moment of reflection, then candid, rubric-grounded feedback. Difficulty adapts as your craft sharpens.
Generators
Monsters with code-checked challenge ratings, characters, NPCs, magic items, spells, and locations. Save them to your library or drop them straight into a campaign.
Homebrew the DM runs
Save your creations into a campaign and they become its canon: the AI DM runs your custom monsters, NPCs, items, spells, and locations as written, with the stat block you gave them. All SRD 5.2 compatible, with challenge ratings checked in code, so a homebrew monster stays balanced and legal at the table.
Scenes you can see and hear
Generate scene art and character portraits in your campaign's style, and have the DM's narration read aloud. One generation serves the whole party.
One-shots you can finish
Not every story needs a year. A one-shot is a self-contained adventure with a hook, a middle, and a real ending, paced toward its climax so it lands in roughly one sitting, and it hands you a ready-made party at level 3 to 5 so play starts at the table rather than at character creation. Every plan includes them; Premium runs the most at once.
Forge your own campaign
Describe the premise, themes, and tone you want and the forge builds the campaign around them, then run it yourself or hand it to the AI Dungeon Master. It works for one-shots too, at a lower cost than a full campaign. Included on the Premium plan.
Built on the open SRD 5.2 ruleset
Character creation, leveling, and combat follow the System Reference Document 5.2, the open fifth-edition-compatible ruleset, with validation in code so a sheet stays legal.
A codex your campaign writes itself
Everyone your party has met, everywhere it has been, and every quest it has taken, browsable and searchable without anyone keeping notes. It reads the campaign's existing record rather than asking you to maintain a second one, and what the Dungeon Master is keeping back stays back.
Art in any style
Set an art style for your campaign and the generated scenes and portraits follow it. A few examples the app can make:
See it in action
Real screens from the app. Tap any to open it full size.
Honest machinery
The optional AI features run on large language models from established AI labs, each matched to the job it does best. The current model lineup, and the full picture of what the AI does and does not decide, lives on the AI transparency page.
Dice come from code, not the model
Every dice roll, and every change to your character or the world, is computed by our own code, not by a model. The AI narrates and decides what happens in the fiction; the numbers come from code.
Bring your own models
Prefer to run on your own models? Add an API key from Anthropic, OpenAI, or Google, or point to a local model, in your account settings, and your play runs on your key instead of ours.
Or run it with no model at all
A campaign where you are the DM uses none of this. Your narration and your mechanical controls run through the same engine and the same code roller, with no model call behind them, and any AI role at the table is one you add on purpose.
How it is priced
Playing is free to start: every account gets daily allowances for play turns, character generation, drills, and forecasts, plus three campaigns and a one-shot. Subscriptions raise every one of those and unlock images, read-aloud audio, AI companions in multiplayer, deeper coaching feedback, and stronger models; Premium adds forging your own campaigns and one-shots. Credits cover anything beyond your daily allowance, so a big session need not hit a wall.
The Dungeon Trainer is in open beta, which means the product is still changing week to week and occasionally breaks. Playing is free to start. The pricing page has the current plans and says whether sign-ups are open right now.