An AI story service writes fiction from your prompt, your characters or your choices, and a few of them narrate it. They look alike from the outside, and four things separate them: whose model it is, what each paid tier holds in its head, what the same plan costs on the web and in an app store, and what the service publishes about characters under 18. Our glossary entry on the AI story generator sets out the terms.
Seven of the nine services here are for readers and players. Sudowrite and NovelCrafter are writers' tools, covered because the same model question decides what an author can draft. They are not ranked as reading apps, and authors will find more on our pages for writers, starting with the best erotica platforms for writers. Everything below was read from each service's own pages on October 27, 2026. We have not used any of them.
The nine at a glance
| Service | What it is | Free access | Cheapest paid price | Runs on |
|---|---|---|---|---|
 AI Dungeon | Typed text adventure | Free tier: 4k tokens of context, 25 Memories | $14.99 a month (Journey) | Web, iPhone, Android |
 NovelAI | Subscription storyteller | No free plan; one-time trial | $10 a month (Tablet) | Web, installable as a web app |
 Erota | Explicit stories from a form | 15 daily credits, Apprentice model only | $9.90 a month (Premium, erota.ai checkout) | Web |
 DreamGen | Role-play and story writer | 200 monthly and 25 daily credits | $7.83 a month, list price (Starter) | Web |
 DreamPress AI | Chaptered stories, chat and narration | 15 daily credits | $9.99 a month on the web; $12.99 on iOS | Web, iPhone |
 NovelX | Explicit story generator with audio | 10 generation tokens | $18.99 a month (Premium) | Web, iPhone |
 Pirr | Interactive romance, text only | 20 daily Standard AI actions | $12.99 a month on the App Store; the website prints $8.99 and $12.99 | iPhone, Android, web beta |
 Sudowrite (writers) | Drafting tool for novelists | No free plan; trial | $19 a month, or $10 paid annually (Hobby & Student) | Web, iPhone, Android |
 NovelCrafter (writers) | Novel-writing software, no model of its own | No free plan; 21-day trial | $4 a month with no AI; $8 with AI through your own key | Web |
Whose model decides what is allowed
The content rules belong to whoever supplies the model. A service that runs its own can allow what it likes. One built on another provider's API inherits that provider's limits. A tool that lets you bring your own key hands the question to you. The useful question is never whether a service is "uncensored" but whose model it is, and what that supplier forbids.
Few of these services say. Sudowrite is the clearest: its own Muse model is documented as having virtually no content filter, while its OpenAI-based models are documented as strict. NovelCrafter ships no model at all. For the rest, the pages we read name models or none, and say little about who supplies them.
| Service | What its pages say about the model | Where the published content rule comes from |
|---|---|---|
| AI Dungeon | Names models such as DeepSeek V4 Flash, GLM and Dynamic Large; does not say who supplies each | Its own AI Safety Setting (Safe, Moderate, Mature) and an in-play filter |
| NovelAI | Home page says powered by GLM 4.6; docs name Llama 3 Erato, Xialong and Krake as Opus-only; supplier not stated | Terms restrict nothing and permit nothing in so many words; "No NSFW" applies to public Explore uploads only |
| Erota | Models called Apprentice, Artisan and Master; supplier not stated | Its own Terms, with a short list of banned themes |
| DreamGen | Included "basic and premium" models plus metered third-party models; the third-party list was not recorded | Terms ban illegal content and sexual content involving people under 18; no other sexual-content ban |
| DreamPress AI | A "standard model" and "premium-model" chapters, unnamed | Its own Content Policy, with a Sexual and Erotic Content section |
| NovelX | Not named | Its own Acceptable Use Policy |
| Pirr | "Advanced AI" and writers' story arcs; no model named | Its own Code of Conduct |
| Sudowrite | Its own Muse and Ballad, plus 30 or more others, some OpenAI-based | Muse: "virtually none". OpenAI-based models: "strict", inheriting OpenAI's moderation |
| NovelCrafter | None: you connect a vendor or a local model | Whatever the connected model or its provider decides; the Terms bar only unlawful use |
Our guide to whether AI story apps allow NSFW goes into this question in more depth.
Tiers are sold on context size
Context is how much of your story the model can see when it writes the next passage. It decides whether a character introduced an hour ago is still in view. Plans that look identical on a pricing page can differ a great deal here: AI Dungeon's published context runs from 4k tokens on its free tier to 32k or 64k on its top paid tier (its own pages disagree), which is why it pays to read what each tier holds. Three services publish a figure; the others sell something else.
| Service | What separates the tiers | Figures on the pricing pages |
|---|---|---|
| AI Dungeon | Context, Memories, credits | 4k tokens free, then 8k, 16k, 32k and 64k at $14.99, $29.99, $49.99 and $99.99. The help page still says 32k for Ultimate. |
| NovelAI | Memory and bonus Anlas; text is unlimited on every tier | 8,192, 12,288 and 28,672 tokens at $10, $15 and $25 |
| DreamGen | Context window, credits | 5,000, 15,000 and 30,000 tokens at $7.83, $19.35 and $48.30 (list) |
| Erota | Monthly credits; each model and each listen has a credit price | 200, 400 and 1,000 credits; no context size published |
| DreamPress AI | Credits and "unlimited writing" on the standard model | 1,000 monthly credits on Pro; no context or memory size published |
| NovelX | "No token limits" on Premium | 10 tokens free; what a token buys is not defined |
| Pirr | Standard AI actions, characters per story | 20 a day free, unlimited on Premium; no sizes published |
| Sudowrite | Credits per month | 225,000, 1,000,000 and 2,000,000 credits; no context size published |
| NovelCrafter | Software features, not AI | Context depends on the model you connect |
NovelAI is the only one that gives its memory in both tokens and characters, four characters to the token. Applying that ratio elsewhere is a rough yardstick at best. Each service page does the sum on its own tiers, and how story app credits work covers the credit systems.
Web prices and store prices
Where a service sells through an app store as well as its own site, the two prices often differ, and the records keep them as separate rows. We give both, and say which is which.
| Service | Web | App store |
|---|---|---|
| AI Dungeon | Monthly tiers from $14.99 to $99.99; web-only Shadow Tiers from $246.66 | App Store items with no billing period; cannot be matched to tiers |
| DreamPress AI | Pro $9.99 a month or $71.99 a year | iOS $12.99 a month, $9.99 a week, and yearly items at $78.00, $79.99 and $48.00 |
| NovelX | Premium $18.99 a month; yearly and day-pass prices unknown | $18.99 monthly, $4.99 weekly, four yearly items from $66.00 to $129.99 |
| Sudowrite | $19, $29 and $59 a month, or $10, $22 and $44 a month paid annually | iPhone: $24.99, $39.99 and $84.99, monthly only |
| Pirr | The site prints "$8.99/month or $12.99/month" with no term for either | App Store: $12.99 monthly, $99.99 yearly |
| Erota | erota.ai checkout in dollars: $9.90, $14.90 and $29.90 a month | No store app found; Patreon route in euros plus VAT: €9, €13.50, €27 |
| NovelAI, DreamGen, NovelCrafter | One web price list each | No store listing found |
What each publishes about characters under 18
Two different things get called an age rule: the minimum age for the user, and a rule or sentence about the characters. Four services publish a detailed written rule: AI Dungeon, DreamPress AI, Pirr and NovelX. Erota, DreamGen and Sudowrite have a line in their terms. For NovelAI and NovelCrafter we found no published rule in the pages listed. That is a finding about the pages we read, not a claim that either has no policy.
| Service | Minimum age for the user | Rule on characters under 18 | Sentence that all characters are adults |
|---|---|---|---|
| AI Dungeon | 13 in the Terms; 18 confirmed to switch on Mature | Detailed, in the Community Guidelines, with a filter that runs on Mature | Not found |
| DreamPress AI | 18+ gate | Detailed, in the Content Policy | Yes |
| Pirr | 18+ platform; declaration to turn on NSFW | Detailed, in the Code of Conduct | Yes |
| NovelX | 18+ gate | Detailed, in the Acceptable Use Policy and the FAQ | Not worded that way; a ban on characters under 18 |
| Erota | 18, a warranty in the Terms | One line in the Terms | Yes, in the pricing page footer |
| DreamGen | 18, a warranty in the Terms | One line, including fictional characters | Not found |
| Sudowrite | 18, a warranty in the Terms | One line in the Terms | Not found |
| NovelAI | 18, in the Terms | We found no published rule in the Terms, Privacy Policy, docs FAQ, Subscription page or Explore page | Not found |
| NovelCrafter | No minimum in the Terms; the Privacy Policy says it is not directed at people under 18 | We found no published rule in the Terms, Privacy Policy, Imprint, FAQ, NSFW model guide or billing help | Not found |
Every age check here is a declaration: none of the services describes a document check. The NovelX review publishes a further finding that belongs next to this table: its acceptable-use policy bans incest and non-consensual content, while its public library carries tags for both. The review gives both sides and where to check them.
Where to go next
Each service page repeats the arithmetic on its own plans. For the wider field, the apps with AI-generated stories page lists who says so on their own pages, and free AI erotica stories collects the free options. Services that are not about AI sit under platforms and apps.