Snake Rules vs Perenne Note. Digital Notebook

Snake Rules — Precise measurements from a single photo Snake Rules makes it easy to measure the length of snakes, lizards, and other animals using just a photo and a simple reference object. Whether you are a keeper, breeder, or enthusiast, you can obtain accurate measurements in seconds — all directly on your device and without collecting any personal data. How it works Take a top-down photo of your animal next to a reference object (a ruler, tape measure, phone, bank card, etc.). Mark the start and end of the reference object to set the scale. Add points along the animal’s body for precise measurement. Adjust points by dragging them for maximum accuracy. Save your results and organize them by individual animals. Everything happens on-device, securely and privately. Features • Accurate measurements using only a photo • Simple and intuitive point-marking system • Zoom and pan to refine precision • Real-time length display • Save and organize multiple animals • Growth tracking with visual charts • Export individual animals or all animals in PDF • Export CSV data for use in other apps • Import and restore animal data at any time • Works offline — no accounts, no tracking, no data collection • Full privacy: your photos and measurements never leave your device Designed for keepers, breeders, and reptile (or other animals) lovers. Track growth over time, maintain accurate records, and store all measurements in one place. Perfect for snakes, lizards, and any animal whose size can be estimated through a reference object. Privacy First Snake Rules does not collect, store, or transmit any personal information. All calculations and data remain entirely on your device.

People don't dream of better note apps. They dream of mental clarity. Perenne Note is a minimalist note-taking app for iPad and Apple Pencil — now with a free companion app for iPhone. It doesn't try to replace your entire workflow. It's a digital notebook: the kind you'd toss in your bag, open at a café, and fill with notes, sketches, and lists. No infinite canvas. No AI features. No productivity theater. Just paper, a pen, and your ideas. DESIGNED FOR APPLE PENCIL Three tools: a pen for clean handwriting, a pencil that feels like real graphite, a highlighter for emphasis. Powered by Perenne Engine, our custom Metal rendering pipeline built from scratch: real scanned graphite textures, paper grain that reacts to your strokes, tilt and pressure captured in every line, rendered live at full Retina resolution. Adjustable width, opacity and line style, an eyedropper for any color, and a reading mode so your palm never leaves marks. NOTEBOOKS THAT FEEL REAL Custom 3D covers — 10 colors, 5 textures, or your own photo. Blank, ruled, grid or dotted paper, or design your own with the Pattern Editor: rules, grids, planners, calendars. Up to 100 pages per notebook, landscape spreads or portrait scrolling, colored bookmarks. NOW ON YOUR IPHONE Your notebooks, in your pocket. Flip through your pages exactly as you wrote them, search everything, capture ideas on the go. Free, and synced privately through iCloud. QUICK NOTES Ideas don't wait for your iPad. Jot notes with rich text, checklists, tables and photos — on iPhone or iPad. Organize them with folders and tags, assign them to a notebook, then place them on the page when you're back with your Pencil. REMINDERS AND CALENDAR Circle anything with the lasso and set a reminder. The notification arrives with your own handwriting attached — tap it and land exactly on that page. One-time or recurring, with optional events in your Calendar. THE DESK Drag sticky notes, photos, and text boxes off the page onto the desk around your notebook — they stay visible while you work, like a real desk around a physical notebook. Write on stickies, draw on photos, format text freely. Everything moves, scales, and rotates — on the page or on the desk. EXPORT AND SHARE Export any page or full notebook as PDF or PNG — ready for printing, archiving, or sharing. SYNC ACROSS DEVICES Notebooks and notes sync automatically with iCloud between your iPad and iPhone, with a visible sync indicator. PRIVATE BY DESIGN No accounts, no tracking. Your notes stay on your device and sync securely through Apple's private iCloud. MADE FOR YOU Toolbar at the top or bottom, controls on your dominant hand's side, gesture undo and redo. Available in 14 languages. Ready for iOS 27 and iPadOS 27. CREATIVE STATS Track pages filled, strokes drawn, and your daily streak — with an animated Year Wrapped at the end of the year. TRY IT FREE Start with one notebook and 6 pages to explore every feature. Unlock more notebooks with a one-time purchase or go unlimited with a subscription. Perenne Note. Just a notebook. Privacy Policy: https://perenne.app/privacy-policy Terms of Use (EULA): https://perenne.app/terms-of-service