Lectra Notes vs Pocket Experiments Science Lab

Lectra is a workspace for the documents you think on: lecture slides, problem sets, papers, and textbooks, marked up by hand and kept in one library that works without a signal. READ AND MARK UP Open any PDF and work it over with Apple Pencil. A pressure-responsive pen, highlighter, and eraser in a calm, distraction-free editor keep your ink sharp at any zoom. Select the document's own text with a finger. On Apple Pencil Pro, squeeze to switch tools. MADE FOR IPHONE DUO Folded, Lectra fits the outer screen. Open it, and your page spreads across the full display, with every control kept clear of the camera and status bar. On iPad, keep two documents side by side. RECORD THE LECTURE BESIDE YOUR NOTES Start recording from a control that floats above the whole app, then keep writing. Tap a handwritten stroke to hear what was being said as the pen moved. Drag the playhead and watch the page fill back in, stroke by stroke. Transcription runs on your iPad, and an hour of lecture takes about 15 MB. NOTEBOOKS AND PAPER Start from a blank page when the thinking hasn't found a document yet. Choose blank, lined, grid, dotted, or Cornell paper for each new page, then export your pages as PDFs. SCAN ANYTHING Bring paper into the record. Scan pages with the camera and mark them up like any other PDF. ASK YOUR DOCUMENTS Ask a question about what you're reading and get an answer that cites the page it came from. Summarize a document to get to the point faster. These features run on your iPad, are off until you turn them on, and never use your notes or documents to train a model. WHEN READING TURNS INTO WORK Run Python where you already work: notebooks with charts, a real shell, Git, and a code editor, all on your iPad and all offline. The document and the work on it stay in the same place. YOUR MAC, TOO Lectra for Mac is a free download at canvascope.org/mac. It brings the whole app to your desktop, puts your Mac on your iPad as a remote desktop, sends documents straight between iPad and Mac, and shares one clipboard. The Remote Desktop assistant can open a website, search, or launch an app on your Mac in one step, and asks before it acts unless you turn on Auto-run. A LIBRARY THAT KEEPS UP Everything in one place, available offline, and backed up when you sign in. Your documents are yours: export them anytime, in formats that open anywhere. PRIVATE BY DESIGN No ads and no tracking. Lectra is free to use.

Twenty-six rooms. Not a workbook — a bench in each one. You set the parts out yourself, turn the knobs, and measure with the instruments. • Hang as many weights as you like anywhere along a balance beam, and even it up • Drag molecules onto the bench and see what they form • Set a magma's silica and the depth where it freezes, erupt it, then look at the rock through a hand lens and measure the grains • Stretch two strings, detune one, and listen to the beats • Drop three seismometers on a map; three circles meet at one point, and that point is the epicenter Every number is measured off the picture. Nothing here works a value out of a formula and then "checks" it against the same formula. The grains under the lens are really drawn, and their size is really measured. Turn a knob and the picture changes; when the picture changes, the numbers change with it. Every room has three steps: 1. Move it — turn one knob and watch what changes 2. Count it — line the measurement up against the formula and look at the gap 3. Check it — one question, and the reason either way Every room also has a question box. Clear it and the room moves up a tier: none → bronze → silver → gold. There are 78 questions in all. But the questions are not the main act. Playing with the bench is; a question is the detour you take when you think “wait — could I actually build that?” The topics are middle school and high school science: forces and motion, springs and buoyancy, pendulums, circuits, electromagnets, ray optics, lenses, sound, changes of state, solubility, titration, electrolysis, chemical reactions, preparing and collecting gases, the microscope, cell division, photosynthesis, flower structure, heredity, strata, rocks and volcanoes, earthquakes, and the sky. Three neighbors of science come along too: probability, logic gates and regular expressions. ADS AND THE ONE-TIME PURCHASE The app is free and shows ads: a banner along the bottom of the screen, and a full-screen ad when you open the app. All 26 rooms and all 78 questions are open from the first launch. There is exactly one in-app purchase and all it does is turn the ads off — it unlocks nothing and adds nothing. It is a single one-time purchase with no subscription (¥5,000 in Japan; the price for your country is shown in the app). Not based on, or affiliated with, any particular textbook.