Select the confusing part. Press one key.
Option+A turns jargon, legalese, an error message or a dense paragraph into a plain sentence — then a chat if you want to dig in.
Looking something up means losing your place, and search results are three ads and a listicle away from the answer.
aiCat explains the exact thing you highlighted, in your own language, in context — and the chat that opens already knows what you selected.
Explain, step by step
- Highlight the part that is actually confusingOne clause of a contract, one line of a stack trace, one sentence of a paper. Not the whole page.
- Press Option+AOne plain sentence first, then at most five bullets, in your own language even when the text is not.
- Keep askingThe chat that opens already has the selection attached, so the follow-up starts at the second message rather than the first.
What makes aiCat's explain different
One plain sentence first
Then at most five bullets. Never a wall of text.
Jargon defined inline
Terms are listed with short definitions you can scan.
In your language
The explanation comes in your native language even when the text is not.
Follow-up is one keystroke
The chat opens with your selection attached.
People use it for
- Stack traces and compiler errors
- Contracts and terms of service
- Academic papers
- Financial and medical documents
Highlight the error message and press one key
Free to start, 10 aiCatCoins a month. macOS, Windows and Linux.
The cost of looking something up
The expensive part of not understanding a sentence has never been the lookup. It is losing your place, and then the three search results between you and the answer.
An explanation is a small request — a fraction of a coin — which is what makes it reasonable to ask about a sentence you would otherwise have read past.
aiCat pricing at a glance
| Plan | Price | aiCatCoins / month | Max selection | What it unlocks |
|---|---|---|---|---|
| Free | $0 | 10 | 500 chars | Everything aiCat does, plus free dictation and your own memory |
| Premium | from $6/mo (list $10) | 3 000 | 5 000 chars | Think More, read-aloud, encrypted memory, premium models |
| Team + Offline | from $18/member | 12 000 | 50 000 chars | Edit your memory, MCP access, local models, team sync |
| Enterprise | from $90/member | 150 000 | Unlimited | SSO, audit, best coin rate |
The confusing paragraph is still on your screen
Download for free and select it.
Frequently asked
Can I explain text in any app?
Yes — aiCat reads the selection at the OS level, so it works in native apps, browsers, IDEs, terminals and PDF readers.
Is explain free?
The Free plan includes everything aiCat does, with 10 aiCatCoins per month. Think More and read-aloud start at Premium, which starts from $6/month.
Which AI model does it use?
By default the cheapest model that is good enough — currently Gemini Flash Lite, falling back to Gonka. You can pick Gemini Pro, Claude, GPT or a local model instead, per task.
Does aiCat work in every application?
Yes. It works at the operating-system level rather than through per-app plugins, so it covers native apps, browsers, IDEs, terminals and PDF viewers alike.
Is my text sent anywhere?
Only the text you explicitly act on is sent to the model you selected, for that one request. Your history is stored locally on your device. Team + Offline can run a local model so nothing leaves the machine at all.