Turn Doomscrolling into Deep Focus. Solve to Unlock.
Designed for the analytical mind. Built for high schoolers, STEM students and graduates who'd rather solve than scroll.
Prove/n intercepts addictive social apps on your phone and locks them behind quick questions in computer science, math, engineering, economics, biology, and chemistry, or questions written from your own notes. Earn your screen time.
def make_multiplier(n): return lambda x: x * n times3 = make_multiplier(3) print(times3(4))
What does this snippet evaluate to?
Prove it to unlock
Answer one quick question to add minutes to your screen-time balance.
Five Pillars of Friction.
Generic screen-time apps rely on soft willpower prompts. Prove/n puts a real barrier in front of your feeds, designed for logical minds.
Intelligent Intercepts
Prove/n steps in the moment you open Instagram, X, TikTok, or YouTube, before the algorithmic feed even renders.
10-Second Knowledge Gates
Bite-sized questions across computer science, software, math, engineering, economics, biology, and chemistry that snap your brain awake. Pick the subjects you want to be quizzed on, and your level: High school (with science and history), University, or Graduate.
Earned Minutes, Spent Honestly
Every correct answer adds minutes to your screen-time balance. Guarded apps spend it minute by minute with a live countdown in the corner. Hit zero and the app locks until you solve again.
Smart Break Nudges
Prove/n learns how you use each app and warns you with plain facts, not guilt: "You've spent 18 of today's 70 minutes on Instagram." Set a daily goal and you get a heads-up as you near it and again when you reach it. Opt into habit nudges and it also flags reopen loops and long stretches of passive scrolling.
Privacy-First by Design
Your app habits are analyzed on your phone and never leave it: not to our servers, not into cloud backups. No ad trackers, no third-party SDKs.
Turn tonight's lecture into tomorrow's gate.
Upload your own notes and Prove/n writes a private set of questions from them. Tick "Include questions from my notes" in the Learn tab and they show up alongside your subjects, so every unlock doubles as revision.
PDF, photos, or pasted text
Pick a PDF, photograph each page of your handwritten notes, or paste a summary. Up to 50 pages per upload and 100 pages a month, included in your subscription.
Grounded in what you wrote
AI outlines your notes into topics and key points, writes each question from a passage of your notes, then a second check rejects any question whose answer your notes don't support.
Private by default
Photos are read on your phone and only their text is sent. Names, emails and phone numbers are removed before the AI sees anything, and a PDF is deleted once it's read. Your questions are only ever shown to you, never added to the shared pool, and you can delete an upload at any time.
In which stage of photosynthesis is water split, releasing oxygen?
check_circle Solved: +2 minutes added
Each correct notes answer earns 2 minutes, up to 20 minutes a day.
How Prove/n Reclaims Your Brain.
Zero complicated setup. Establish your boundaries once, and let a little mental friction safeguard your deep work hours.
Set Your Guarded Apps
Pick your primary compulsive habit triggers—Instagram, X, YouTube Shorts, Reddit, or TikTok.
Answer the Gate
Launching a guarded app immediately triggers a quick question from the subjects you picked, from calculus to cell biology, or from your own uploaded notes.
Enjoy Earned Minutes
Browse deliberately while your earned balance counts down. When it hits zero, the gate locks back up.
Support & Feedback.
Have a question about our puzzles? Want a new topic in the question pool? Drop us a note.