Free is genuinely free — unlimited campaigns, characters, and notes, forever. Pay only when you want generous AI credits to do the prep work for you.
No card. No trial gimmick.
save 20% — billed annually
Lifetime — capped at 100 buyers, ever
Dungeon Diary is built by one person (hi, I'm Matt). The app itself — storing your campaigns, running encounters, tracking your world — costs almost nothing to run. But every AI-generated NPC, quest hook, or character portrait calls a real model, and those have a real per-request cost.
Pro covers that cost via a credit system so heavy users pay proportionally and casual users don't subsidize them. Free stays free — actually free, not “free trial” — because the rest of the app costs me cents per user per month.
Free gets 10 AI text generations + 1 character portrait per month so you can taste what the AI features are like — enough for a session's worth of prep work. If you want more (and most active DMs do), Pro is $5/mo for 500 AI credits. Need even more in a busy month? Top-up packs let you buy more without changing plans. If you never use AI at all, you literally never need to pay. That's not a marketing hook — it's just how the math works.
The reason text and portraits have different limits: text generation costs about a penny per call, portraits cost about four cents. The credit ratio reflects this — 1 text = 1 credit, 1 portrait = 5 credits.
Most “free tier” SaaS pages bury the limits in fine print. Here's the actual deal: everything that doesn't cost money to run is free for you, forever. That means:
The only thing capped on Free is AI: 10 text generations and 1 character portrait per month. Run out? Wait until next month or upgrade to Pro. Your campaigns aren't going anywhere.
Lifetime access for $79, capped at the first 100 buyers, ever. After that the option closes — not for FOMO theater, but because I don't want to be supporting a thousand lifetime accounts at $0/mo when the AI costs grow.
If you've used DD in beta and it works for you, this is the cheapest you'll ever lock it in. Three years of Pro for one payment, and a Founder badge that says “I bet on this when it was someone's side project.”
Claim a Founder's PassPro and Founder's Pass both come with 500 AI credits per month that reset on the 1st. Credits are spent based on what each kind of generation actually costs to run.
With 500 credits you can mix and match:
Most active DMs use 100–300 credits per month. The 500 cap is generous on purpose. If you're burning through it (running 5+ campaigns, content creator, etc.), top-up packs are right there.
Need more credits in a busy month? Buy a one-time pack — no plan change, no anxiety, just more capacity.
Top-up credits roll over as long as your subscription is active. Cancel and you lose unused top-up credits, so use them before you cancel. Free tier users can't buy top-up packs — upgrade to Pro first.
Yes. Free is the default state of the app, not a trial. Unlimited campaigns, characters, NPCs, encounters, world building, and session notes are committed to forever. If anything changes, existing free users keep what they had on day one.
Your account drops back to Free. All your campaigns, characters, NPCs, and notes stay exactly where they are — nothing is deleted. The only change is your AI access drops back to the Free tier (10 text + 1 portrait per month). Any unused top-up credits expire on cancellation.
Pro gives you 500 credits per month. Text generations (NPCs, quests, lore) cost 1 credit each. Character portraits cost 5 credits each. Mix and match however suits your prep style. Credits reset on the 1st of each month.
Buy a top-up pack at any time. Top-up credits don’t expire (as long as your subscription is active) and stack on top of your monthly allowance. There’s no waiting until next month if you have a busy session week.
No. Your 500 monthly Pro credits reset on the 1st. The reasoning: it lets us run the math knowing what each user costs per month. Top-up credits *do* roll over while you’re subscribed, so if you want a buffer for busy months, that’s the way to build one.
Yes, and they don’t need their own paid plan. You invite them to your campaign and they get a player view of characters, party loot, and session recaps.
Because D&D Beyond charges $5.99/mo for their subscriber tier and that sets the audience’s anchor. Dungeon Diary complements Beyond — it’s not trying to replace it — so pricing under it makes the bundle feel reasonable.
Yes — $48/year is 20% off ($60 if billed monthly). Same features.
Text generation runs on a creative-writing-tuned model (Rocinante 12B by default, with Gemini 2.5 Flash as automatic fallback). Character portraits run on Gemini 2.5 Flash Image. Models can change as better options ship — the per-credit cost stays the same.
Your campaign data is yours. We don’t train models on your content. Standard data export is built in — download everything as JSON or markdown anytime.
14 days, no questions. Email and you’ll have a refund within a day.
Because locking in early supporters at lifetime pricing rewards the people who took a bet. A 30%-off code anyone can use online doesn’t.
Dungeon Diary is 5e-first today. Other systems are on the roadmap if/when DD has the revenue to support them. Founder’s Pass holders get every system that ships, free.
Yes — there’s a gift checkbox at checkout. They get a code, you get the warm fuzzies.
No credit card required. Generate your first NPC in under a minute.
Questions about pricing? hello@onenomad.dev — I read every email myself.