Comparison

F2S vs fork ai

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

F2S

Features
Read full description

Block social media until you can prove you've learned something. F2S intercepts your social media habit and turns it into a study session. When you open Instagram, TikTok, or any app you choose, F2S steps in with a quiz. Answer correctly by explaining concepts in your own words, and earn your scroll time. Fail, and try again. It's the Feynman Technique meets screen time control. HOW IT WORKS • Upload your study notes, PDFs, or any learning material • AI generates quiz questions from YOUR content • When you try to open a blocked app, F2S intervenes • Answer 3 voice-based questions by explaining concepts out loud • Pass the quiz → earn 15 minutes of scroll time • Track your streak, daily stats, and average score WHY VOICE? Typing an answer is easy to fake. Speaking forces you to actually understand. The Feynman Technique says: if you can't explain it simply, you don't understand it. F2S puts that to the test every time you reach for social media. SMART LEARNING • AI validates your spoken explanations in real time • Spaced repetition brings back questions you struggled with • Questions adapt to your study materials, not generic trivia • Focus mode lets you drill specific topics before an exam BUILT FOR YOUR WORKFLOW • Works with iOS Shortcuts for seamless app blocking • Sign in with Apple — no new account needed • Cloud-synced across all your devices • Clean, minimal design that stays out of your way START FREE Try F2S free for 3 days. See how much you learn when your scroll time depends on it. Privacy Policy: https://feynman2scroll.web.app/privacy.html Terms of Use: https://feynman2scroll.web.app/terms.html

About

fork ai

Features
Read full description

Upload your lecture PDF and fork ai turns it into a mind map of notes. Then dig into any part of it: open a branch on the map, or tap a sentence and Ask AI about exactly that. Every question becomes a branch on your map, so you can find your place again. HOW IT WORKS • Upload a lecture PDF (lecture slides saved as PDF are fine), a text file, a Markdown file or an image • fork ai builds a mind map of notes from it • Open any branch from the map to read it • Tap a sentence, or highlight a passage, and tap Ask AI to ask about exactly that • Each answer becomes a new branch on the map • Mix several branches into one new answer with the Mixer KEEP AND SHARE YOUR WORK • Highlight in colors and pin callouts • Export a session to Notion as a structured page • Share a session with a link. Anyone can read it without an account • Choose the AI model for each branch • Turn on web search to get answers with cited sources • Get a notification when a long research run finishes BEFORE YOU UPLOAD • fork ai reads up to 50 pages, or about 40,000 characters, of a file • Scanned PDFs with no text layer are read by OCR: the first 10 pages only, and English only • If a file was only partly read, the app tells you, so you can split it and upload the rest • You need an account to upload. Sign-up is free CREDIT New accounts get a one-time $5 starting credit. AI answers use up credit. When it runs out, you can buy more inside the app.

Screenshots

F2S4 screens
fork ai4 screens

Verdict

The call

The clearest difference is ads: fork ai at none against F2S's shown. fork ai also leads on iOS requirement (15.0 vs 18.6). F2S's advantage is update cadence (every 3 weeks vs every 2 months). On price, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. F2S sells 2 in-app purchases, starting at $5.99 per month and fork ai sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

F2S ships an update every 3 weeks, fork ai every 2 months. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

Scorecard3 real differences Ā· 3 level
F2S versus fork ai: the parameters behind the verdict, then further details
ParameterF2Sfork ai
PriceFreeFree
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.615.0 — better
Further details — not scored
Size57 MB3 MB
Age rating4+4+
DeveloperDestan GokalpGokul Madathupalyam Chinnappan

In-app purchases

2 purchases

F2S

Subscriptions2
  • Monthly3 Days trial$5.991 Month
  • Yearly3 Days trial$34.991 Year
2 purchases

fork ai

One-time2
  • $5 Credit$6.99
  • $10 Credit$13.99

Questions

Is F2S free?
F2S is free to download, with in-app purchases available.
Is fork ai free?
fork ai is free to download, with in-app purchases available.
Do F2S or fork ai have ads?
F2S shows ads; fork ai does not.
Which is updated more often, F2S or fork ai?
F2S ships an update every 3 weeks, and fork ai every 2 months. Most recently, F2S was updated on October 14, 2026 and fork ai on October 9, 2026.

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