echu vs Anti/Agent
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
echu
Transform lengthy online content into concise, digestible cards for efficient learning. Summarize articles, videos, PDFs, and EPUBs into reviewable snippets. Organize your saved information into a personal library for quick understanding.
- Convert links to short cards
- Summarize articles
- Summarize YouTube videos
- Summarize PDFs
- Summarize EPUBs
- Create a personal review library
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Echu — Turn links into short, readable cards Echu helps you actually learn from the content you save. Turn articles, YouTube videos, PDFs, and EPUBs into short, readable cards you can review in minutes — not hours. Whether it’s a deep-dive article, a saved documentary, or a long newsletter you’ll “read later”, Echu breaks it down into simple cards you can quickly understand and keep in your library. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Anti/Agent
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Save is not the same as learn. A chat answers and forgets. Anti/Agent is the opposite: every page you build comes back and teaches you, on the day you'd otherwise forget. It's an AI notebook for both knowledge and skills. Drop in sources, write your thinking, and choose how each page should return. HOW A PAGE IS BUILT - Sources: drop anything in. URLs, PDFs, YouTube, audio, past pages. Read, indexed, ready to cite. - Editor: a real editor, not a chat. Blocks, formatting, drag-to-reorder, a slash menu. - AI partner: highlight, ask, and the AI streams a researched, cited section right into the page. THREE WAYS A PAGE TEACHES YOU BACK - Memory: flashcards in your own words. You type the answer in plain English and the AI grades it like a teacher. Spaced repetition (FSRS) books the next review for the day your memory is about to slip. - Thinking: dialogues that talk back. Debate a claim, rehearse a mock interview, hold a conversation in a new language, or explain an idea to a curious learner. Each session comes back a little harder. - Skill: exercises with your own rubric. You set the standard in the page; the agent grades your attempt against your bar, not generic correctness. WHY IT STICKS Recognizing an answer and producing it from memory are different skills. Anti/Agent removes the gap between writing something down and being asked about it later, so understanding a source and remembering it stop being two separate jobs. SHARE AND LEARN TOGETHER Make a page public when you're proud of it. Start your own from a page somebody else shared. Spaced repetition keeps pulling either of you back. LEARN ANYTHING Screenwriting. Japanese, French, Mandarin. Python, Rust, ML. Philosophy. Music theory. Anything you can write a page about. FREE TO START 100 credits every month, no card required. Unlimited pages and every learning block on the free plan. PRIVATE BY DEFAULT Your content is never used to train AI models, never shared with third parties, and stored on encrypted infrastructure. Delete everything any time. GO FURTHER WITH A SUBSCRIPTION Optional auto-renewable subscriptions unlock more monthly credits: Starter ($9.99/month) and Pro ($24.99/month). Prices may vary by region. Terms of Use: https://antiagent.io/terms Privacy Policy: https://antiagent.io/privacy
Screenshots
Verdict
The clearest difference is iOS requirement: Anti/Agent at 15.0 against echu's 18.5. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. echu sells 2 in-app purchases, starting at $4.99 per month and Anti/Agent sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | echu | Anti/Agent |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.5 | 15.0 — better |
| Further details — not scored | ||
| Size | 17 MB | 12 MB |
| Age rating | 4+ | 12+ |
| Developer | Low Battery, Inc. | Louis Manhes |
In-app purchases
echu
- Pro Monthly$4.991 Month
- Pro Annual$34.991 Year
Anti/Agent
- Starter$9.991 Month
- Pro$24.991 Month








