Purnote vs MathBlocker

Notes you actually own. Purnote keeps every note as a plain Markdown file in your own iCloud Drive — no database, no proprietary format, no lock-in. Every note is an ordinary .md file in a folder called purnote, so you can open, edit, search, back up or move your notes with any tool you like — on your Mac, in any text editor, forever. Write a note on your phone and it is on your Mac a moment later. Edit it on your Mac and it changes on your phone while you are looking at it. If you ever stop using Purnote, you still have your notes. That is the whole idea. • Free — no subscription, no ads, no accounts • Plain Markdown files, stored in iCloud Drive where you can see them • Share from any app into Purnote — save a post or link as a note, in the folder you choose • Organise notes in folders, with #tags and Smart Folders • Add photos to a note — saved as plain files beside it, never locked in • Create tables from the formatting bar • Drag a note onto a folder to move it • Formatting buttons above the keyboard — headings, bold, italic, lists, checklists, quotes, links — so you do not need to know Markdown to write it • Notes are named after their first line, so the folder makes sense on your Mac • Rendered notes with headings, tables, task lists and code blocks • Full text search across every note • Works without iCloud too, keeping notes on this iPhone Purnote collects nothing. There are no accounts, no analytics, and no servers other than your own iCloud.

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.