Sifra: Math Notes & Calculator

Sifra brings a scientific calculator and a math notebook together. Calculate, write, solve equations, and keep your work in notebooks. Scientific calculator Arithmetic, percentages, parentheses, powers, roots, trigonometric functions, and calculation history. Move a calculation into a notebook page to keep working on it. Math notebook Write with Apple Pencil or your finger, add text and equations, calculate from handwriting, and explore graphs with pan and zoom. Define variables and adjust calculations and graphs with sliders. Choose grid or ruled paper, or import an image or a PDF page to write over. Learning and practice Generate similar linear equations, reveal answers when you choose, and keep a personal formula library. Solution checking compares supported transitions between equation lines after you confirm the text. Save and share Organize notebooks and pages, search your work, and export pages as PDF files or images. Work is saved on your device. Optional iCloud sync and notebook sharing require a suitable iCloud account. Sifra Pro Step-by-step explanations for linear equations with one unknown. Check the equation recognized from handwriting and save the explanation on your page. Sifra Premium Includes Pro plus guided practice with hints, ten-exercise worksheets, and a practice journal with scheduled reviews of difficult exercises. Practice currently supports linear equations with one unknown and integer coefficients. The journal is stored only on this device. The calculator, notebooks, and equation answers are available without a subscription. Saved pages and explanations remain available after a subscription ends. Pro and Premium are monthly subscriptions. Eligible customers can receive a one-month free trial. After the trial, subscriptions renew automatically at the local price shown before purchase. Cancel renewal in your Apple Account settings. Sifra is available in Hebrew, English, and Russian for iPhone and iPad with iOS or iPadOS 17 or later. Privacy policy: https://www.sifraapp.online/privacy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/