Is GM Grimoire a VTT?
Nope. Not a VTT.
GM Grimoire is for planning, running, and recapping your sessions. It can optionally show maps/portraits/mood visuals on a second screen, but it’s not trying to replace minis, grids, or your favorite VTT setup.
Do I need an internet connection?
Nope. It’s local-first, so you can prep and run games even if your Wi-Fi is doing its best villain monologue.
Is there a subscription?
No. No subscription.
You buy the app, you use the app. No monthly “toll to access your own notes.”
Where is my data stored?
On your computer, in your campaign files.
That means you can back it up, move it, zip it, hoard it like a dragon. (A very organized dragon.)
What game systems does it support?
Any system you want to run: 5e, Daggerheart, Pathfinder, CoC, Paranoia, Toon, homebrew, and “we made this up on a napkin.”
GM Grimoire is built to be configurable, so you can track the stats and info your game actually uses.
What’s “Session Mode” and why should I care?
Session Mode is how GM Grimoire helps you improvise without accidentally rewriting your campaign bible.
- Your campaign stays the baseline (canon).
- Your session captures what happened at the table (chaos, consequences, and that NPC your players named “Boat Dad”).
It’s great for playtesting, rerunning the same campaign for multiple groups, and keeping your worldbuilding tidy.
Can I create stuff during a session?
Yes. That’s the point.
Add NPCs, locations, items, encounters, notes, trackers, you name it. GM Grimoire is designed for the moment your players do something you didn’t plan (which is… every moment).
Does it do session recaps?
It helps you earn them.
Quick notes compile into a session log timeline, so you can recap next time without digging through a tragic pile of sticky notes and regret.
Can I export or share a campaign?
Yep.
- Export/share a GM Grimoire campaign so another GM can import it and run it.
- Export to a document so you can format it for publishing, PDFs, handouts, or that “someday I’ll release this as a module” dream.
Can I keep a shared campaign from being edited?
Yes. You can lock a campaign to prevent accidental edits, while still letting sessions do their thing, great for letting other GM’s take it for a spin.
Because nothing hurts like someone “just tweaking one little thing” in your master copy.
Is it good for playtesting?
Very. GM Grimoire is built for iteration:
- session changes stay separate from your baseline
- logs help you review what happened
- you can refine encounters, stats, and structure without losing your mind
Will it be on Steam?
That’s the plan: Coming soon to Steam.
Join the email list and you’ll be the first to know when the Steam page is live (and when early access sneak peeks drop).
What platforms will it support?
The goal is a desktop-first experience. Windows initially, linux & mac tbd
Can players connect to it?
GM Grimoire is built for the GM seat. The mantra here is keep it simple, fluid and don’t interfere with the joy of worldbuilding.
Is my campaign data private?
Your data stays local. GM Grimoire isn’t built around uploading your worlds to a server by default.
(Translation: your secret lore stays secret until you decide to unleash it.)
I have more questions.
Awesome. Hit the email list and reply to any update, or click here.
We love hearing what GMs actually need at the table.