Account and Plans
What signing in adds, how the built-in AI allowance works, and which features a paid plan unlocks.
Translation does not need an account. Install the extension, pick a provider, and read — nothing on this page is required for that.
An account exists for the parts that have to live on a server: your Notebase, your review schedule, your statistics, and anything an assistant reaches over MCP.
What an account adds
| Without an account | Signed in | |
|---|---|---|
| Page, selection, input and subtitle translation | Yes | Yes |
| Your own API keys | Yes | Yes |
| Glossary, custom prompts, custom CSS | Yes | Yes |
| Built-in AI, for Custom AI Actions | Small daily allowance | Larger daily allowance |
| Notebase, card templates, review, statistics | No | Yes |
| MCP | No | Ultra only |
Everything in the first three rows is stored in your browser profile, which is why it works signed out — and why it does not follow you to another computer unless you sync it yourself. See Configuration, Sync & Backups.
The built-in AI allowance
Read Frog ships two providers of its own — Built-in AI and Advanced Built-in AI, the second using a stronger model. Both draw on an allowance rather than an API key of yours.
Below Ultra, that allowance funds Custom AI Actions and nothing else. Page translation, selection translation, note suggestions, video subtitles, input translation and language detection are all deliberately unfunded on the free and Pro tiers — Read Frog reports them as needing an upgrade rather than as being out of quota. Ultra funds every one of them from a single weekly pool.
| Custom AI Actions | Everything else | |
|---|---|---|
| Not signed in | Small daily allowance, keyed to your network | Not funded |
| Signed in, free | Larger daily allowance | Not funded |
| Pro | Larger daily allowance again | Not funded |
| Ultra | One weekly pool | Same weekly pool |
So on any plan below Ultra, whole-page translation runs on a provider of your own, which is the normal way to use Read Frog: Google Translate and Microsoft Translator need no key at all, and an LLM provider needs yours. Assigning your own provider to a feature in API Providers stops it drawing on the allowance entirely — your own API key has no Read Frog limit, only whatever your provider charges you.
Daily allowances reset each UTC day. The Ultra pool is a rolling week anchored to your subscription rather than a calendar week, so a heavy reading day is not capped by that day alone. Because it is one pool, video subtitles — by far the most expensive feature per minute of use — share it with everything else.
What the paid plans unlock
Current prices are on the pricing page; they are not repeated here so this page cannot go stale. What the tiers change:
- Pro raises the Custom AI Actions allowance and includes the AI subtitles quota described in AI Segmentation and Subtitles Quota.
- Ultra is the only plan whose allowance funds anything beyond Custom AI Actions, and the only one that can connect an AI assistant over MCP. That restriction is enforced on the server, so an assistant on a lower plan is refused at connection time rather than failing later.
Signing in
Sign in from the extension popup or at readfrog.app; it is the same account either way, and the extension picks up the session from the website. If the popup still shows Guest after signing in on the website, reload the page you are on — the extension reads the session when a tab loads.
Deleting your account
Account deletion is available from the account settings on the website and removes your notes, cards and review history. It is not reversible, and it does not uninstall the extension or clear the settings stored in your browser profile — do that from the browser's extensions page.