MathBlocker vs Lockin App Blocker

MathBlocker puts a math problem between you and the apps you open too much. You pick the apps you want blocked. When you try to open one after your time's up, a math question shows up instead. You answer it, you get a few minutes back. You don't, the app stays closed. The questions are real. They come from the same problem sets people use to study for the SAT, ACT, AMC, and AIME. You can set the difficulty. Easy questions if you just want a speed bump. Harder ones if you actually want to stop scrolling. Features - Block any app or category — social, video, games, news, browsers - Pick your difficulty, from warmup arithmetic to competition-level - Choose your problem set: SAT, ACT, AMC, AIME, Putnam, or general practice - Earn time back per problem solved (you set how much) - Daily, weekly, and per-app limits - Schedule blocks by time of day (bedtime, study hours, work hours) - Dashboard with usage broken down by app, hour, and day - Custom block screen so it actually feels like a stop sign - Works with Family Sharing if you're setting it up for someone younger A few ways people use it: blocking social apps during work hours. Locking everything after 10pm with hard math. Pairing it with actual SAT prep so the time you would've spent scrolling becomes practice instead. Everything stays on your phone. No account, no login, no data sent anywhere. iOS 16 and up. iPhone only.

Stay locked in Lockin helps you break free from the endless pull of short-form videos and social media. Turn it on to block distracting websites and apps at the system level. When you try to turn it off, Lockin adds deliberate friction first, giving your future self a few extra seconds to choose focus. KEY FEATURES Powerful Blocking - System-level blocking of websites and apps - One-tap batch block for TikTok, Instagram, YouTube, and other short-form platforms - Works across all browsers, including Safari Friction System — The Core Mechanic - Free: Solve one math teaser and one chart teaser before unblocking - Paid ($0.99 lifetime): Solve 1–100 customizable math and chart challenges - Makes impulsive unblocking feel like actual work — so you only do it when you mean it GitHub-Style Contribution Widget - Home screen widget shows your ON-mode time as a contribution graph - See at a glance how consistently you have held focus each day - Tap the widget to instantly add a URL from your clipboard to the block list Simple ON/OFF Control - ON mode: blocking active - OFF mode: unblocked (requires passing your friction challenge) - Temporary ON: start a 15, 30, or 60 minute focus sprint - Temporary OFF: take a short break and let Lockin re-lock automatically - No complicated schedules. Just clear commitment controls. 9 Languages + Emoji Mode Korean, English, Japanese, Simplified Chinese, Traditional Chinese, German, French, Spanish — and a fun Emoji mode for when you need a little levity. Free to Start, $0.99 to Upgrade - Free tier: unlock after one math teaser and one chart teaser - Lifetime ($0.99): unlock premium math and chart challenge modes PRIVACY FIRST No servers. No accounts. No data collection. All data stays on your device. Optional iCloud sync between your own devices. Lock in your focus today.