Cookies & audience measurement
SUX1 uses Google Analytics to understand how to improve the app. No personal data is shared. You can decline with no impact on your experience. Learn more.
You read 30 papers a week. You are preparing an exam from 400 pages of notes. You are digesting a thesis bibliography. SUX1 does all of this for you — a PDF, an EPUB, a URL, one click, a faithful summary. 3 free summaries, then from €2 for 20 summaries. No subscription.
You tried. You pasted the first 40 pages of your notes. ChatGPT answered — then quietly cut off halfway. You tried again, split the text into pieces, re-prompted. You spent an hour on it.
The problem is not that ChatGPT is bad. It simply wasn't designed for this. It is a general chat assistant. What you need is a dedicated summarising tool: a 200-page PDF processed in one go, a scientific paper cleanly extracted from its URL, a whole book split and summarised automatically.
SUX1 does exactly this one thing — and does it well. An honest comparison is on the About page.
You are preparing a literature review. You have 30 PDFs open in Zotero. At 45 minutes per paper, that is 22 hours of reading. You don't have 22 hours.
You drop a PDF into SUX1. You choose the « Key points · Long » format. In 5 seconds you get: the central thesis, the method, the results, the limits and the strongest quotes — everything you need to decide whether the paper deserves a close reading or a simple mention in your bibliography.
Exam in 3 days. The lecturer handed out 400 pages of notes. You won't have time to read everything. You need a summary sheet — not a generic one, but one that keeps the course structure, the exact definitions and the key theorems.
You upload the PDF to SUX1 and switch on « Chapter by chapter » mode. SUX1 detects the chapters automatically, summarises each one, and lets you choose the length. Bonus: built-in read-aloud turns your sheet into a podcast for your commute.
You have been stuck on exercise 12 for an hour. No answer key. Your friends aren't replying in the group chat. You don't just want the answer — you want to understand the method.
You take a photo of the exercise. With the « Explanation & solution » format, SUX1 goes through each step with the reasoning, the units and the classic mistakes to avoid. Like having a private tutor available at 10 pm.
Test tomorrow on the water cycle or on key historical dates. You read your notes for the tenth time and nothing sticks. Yet you remember the lyrics of your favourite songs effortlessly.
Just type the topic into SUX1 and choose « Poem and recitation »: the lesson becomes a rhyming poem, followed by « What to remember ». « Listen to the poem » reads it slowly, then stanza by stanza (Repeat, Next). An abstract idea? The « Metaphors » format explains it with everyday images (« It's like… »).
Yes, for your personal use — studying, revising, taking notes. SUX1 does not publish anything. It is exactly like a handwritten reading sheet, only faster.
SUX1 does not write your work for you. It saves you READING time — not writing. The notes you make and the essay you then write remain 100% your work.
No. Your texts are never used to train a model. You can delete a summary (or your whole account) at any time from Settings.
French, English, Spanish, German, Italian, Portuguese — automatic detection or forced language. For Latin or rarer languages, Claude Sonnet 4.5 does surprisingly well.
Because we find SaaS subscriptions unfair. You pay the price of a coffee for 20 summaries, usable whenever you want: credits never expire. Need more? Packs of 60 (€5) or 130 (€10). That's it.
Try it on your heaviest notes, your most technical paper, your worst-scanned PDF. If you're not convinced, you don't have to do anything — you never pay.
Create my free account