# Sifra: Math Notes & Calculator — Write, solve and graph math > Write, solve and graph math (iPhone/iPad app by Daniel Bar Guy.) - Source: https://appshunter.io/ios/app/sifra-math-notes-and-calculator/id6816128240 (this page in markdown: same URL + `.md`) - Developer: [Daniel Bar Guy](https://appshunter.io/developer/6811388882) - Category: Education - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 17.0 · 304 MB - Languages: American English, Hebrew, Russian - Released: 2026-09-26 - Data updated: 2026-11-10 ## What is Sifra? 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/ ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Pro | $2.99 | per month | | Sifra Premium | $6.99 | per month | ## Is Sifra safe? Not enough ratings yet to assess Sifra. ## Is Sifra legit? Sifra: Math Notes & Calculator has limited verification signals. The AppsHunter Legitimacy Score for Sifra is 58 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 5 releases) ### 1.1.7 — 2026-11-09 • Offline lessons with explanations and worked examples, available on every plan. • Start practice directly from My Practice and choose an equation type and difficulty. • Compare Free, Pro and Premium from the subscription screens. • Improved subscription loading recovery and refreshed screenshots and app previews. ### 1.1.6 — 2026-11-06 • Improved subscription loading and sign-up screens. • Clearer explanations of what Pro and Premium include. • Updated wording in the practice and subscription screens. ### 1.1.5 — 2026-10-03 • Updated calculator with a clearer result display and more comfortable keys. • Improved precision for large and small values, percentages and powers. • A better notebook toolbar on smaller screens. • Search now includes table contents. • Easier keyboard dismissal and text editing in notebooks. • Light and dark appearance fixes and stability improvements. ### 1.1.4 — 2026-10-02 Version 1.1.4 expands the notebook with new tools for learning and practice: • Improved PDF export with readable text, pagination for long and wide pages, and handwriting adapted for a light background. • Import an image or a PDF page as a background to write on. • Generate three similar linear equations and reveal answers when ready. • Save formulas in a personal library, choose an unknown, and enter values to calculate supported results. • Adjust variables with sliders and update calculations and graphs on the page. • Check supported transitions between solution steps after confirming the input text. ### 1.1.3 — 2026-10-01 We improved calculations and notebook editing: division with /, : and ÷, recognition of handwritten fractions and large exercises, and updated results for completed arithmetic expressions. You can now scroll pages horizontally. We improved table insertion and editing, and shapes appear directly on the page with move and resize controls. We added a keyboard dismissal button and an optional haptic feedback setting for calculator number keys in Settings. We improved iCloud sharing preparation and the display of sync states. Choose from six colors for handwritten answers in Settings. Handwritten fractions now also use stroke recognition on iOS and iPadOS 27. We improved notebook sharing links and preparation speed through iCloud. ## Apps similar to Sifra | App | Rating | Price | Category | | --- | --- | --- | --- | | [TRANSFORM WITH SANDHYA](https://appshunter.io/ios/app/transform-with-sandhya/id6741884592) | — | Free | Education | | [רונה — מתמטיקה לבגרות](https://appshunter.io/ios/app/id6799580307) | — | Free | Education | | [HiEdu Graphing Calculator](https://appshunter.io/ios/app/hiedu-graphing-calculator/id6756223118) | — | Free | Education | | [Safeschool Analytics](https://appshunter.io/ios/app/safeschool-analytics/id1661703756) | — | Free | Education | | [תאוריה NivDrive](https://appshunter.io/ios/app/nivdrive/id6813075525) | — | Free | Education | | [האקדמית צפת](https://appshunter.io/ios/app/id6444002101) | — | Free | Education | ## More apps by Daniel Bar Guy - [סלסל - רשימת קניות משותפת](https://appshunter.io/ios/app/id6811388880) All apps by Daniel Bar Guy: https://appshunter.io/developer/6811388882 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-10.*