# Note Note Sahur — AI-Powered Engineering Notes > AI-powered engineering notebook for iPad with on-device processing. (iPhone/iPad app by Sebastian Buso.) - Source: https://appshunter.io/ios/app/note-note-sahur/id6808390931 (this page in markdown: same URL + `.md`) - Developer: [Sebastian Buso](https://appshunter.io/developer/6808391353) - Category: Productivity, Education - Price: Free - Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 27.0 · 5 MB - Languages: American English, European Spanish - Released: 2026-09-20 - Data updated: 2026-10-24 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/note-note-sahur/id6808390931/reviews.md ## What is Note Note Sahur? Created by Jayden Park and Sebastián Busó Derivation Notes is an Apple Pencil-first engineering notebook built for iPad. Instead of typing, you write — and the app understands what you write. CIRCLE TO ASK AI The core interaction is simple: circle anything on the page — an equation, a value, a diagram — and trigger an AI interaction right there. No switching apps, no copy-pasting into a chatbot. Just circle and go. CATCH ERRORS AS YOU WORK Derivation Notes checks unit and dimensional consistency as you derive, flagging mismatches before they turn into wrong answers. Built for anyone who works through physics, engineering, or math problems by hand and wants a second set of eyes. PRIVATE, ON-DEVICE AI AI features run on-device using Apple's Foundation Models framework. Your notes and derivations stay on your iPad — no cloud round-trip required for the core AI interactions. EVERY KIND OF NOTE, ONE APP Whether it's a worked derivation, a lab writeup, a quick sketch, or a running set of reference notes, Derivation Notes supports multiple note types in a single, organized notebook — so you're not juggling separate apps for separate kinds of work. Built for students and engineers who think with a pencil. ## Key features - Apple Pencil-first note-taking - Circle to interact with AI - On-device AI processing - Real-time unit consistency checks - Supports multiple note types - Private and secure ## Is Note Note Sahur safe? Not enough ratings yet to assess Note Note Sahur. ## Is Note Note Sahur legit? Note Note Sahur has limited verification signals. The AppsHunter Legitimacy Score for Note Note Sahur is 58 out of 100 points across 7 verification signals from App Store and developer data. ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/note-note-sahur/id6808390931/reviews.md ### 5/5 — 👍👍 *2026-10-21* goodie app ### 5/5 — Great app *2026-09-27* Free and super underrated. ✌️ ## Frequently asked questions about Note Note Sahur ### What is Blue Papers? Blue Papers is an AI-powered engineering notebook for iPad that lets you write notes with Apple Pencil. It understands your handwriting and allows you to interact with AI by circling content on the page for instant analysis and error checking. ### Does Blue Papers have ads? No, Blue Papers does not contain advertisements. It is a completely ad-free experience for users. ### How does the AI in Blue Papers work? The AI features in Blue Papers run on-device using Apple's Foundation Models framework. This means your notes and derivations stay on your iPad, ensuring privacy and security without requiring a cloud connection for core AI interactions. ### What kind of notes can I create with Blue Papers? Blue Papers supports various note types within a single organized notebook. This includes worked derivations, lab writeups, quick sketches, and running sets of reference notes, eliminating the need for multiple separate apps. ### Can Blue Papers catch errors in my work? Yes, Blue Papers checks unit and dimensional consistency as you derive equations. It flags mismatches in real-time, acting as a second set of eyes to help prevent wrong answers. ### What devices is Blue Papers compatible with? Blue Papers is designed for iPad and is also supported on iPhone. It leverages the Apple Pencil for its primary input method. ### How often is Blue Papers updated? The latest version of Blue Papers is 1.0.2, which was last updated on September 28, 2026. This indicates a recent update, suggesting active development and maintenance. ### What is the age rating for Blue Papers? Blue Papers has an age rating of 4+. This means it is suitable for users of all ages and does not contain content that would be inappropriate for young children. ## Version history (last 4 releases) ### 1.2 — 2026-10-21 Added grade menu, fixed AI, Added correct "created by" section, Overall quality of life improvements ### 1.0.2 — 2026-09-28 Added better AI to circuit diagram. Got rid of lag when closing notepad. Added Reminders Note pad shortcut. Added better image support for adding images into a notepad such as adding ability to draw on images. Name and Icon change to look better ### 1.01 — 2026-09-23 Updated name and better looking home screen, corrected inability to see writing inside notes ### 1.0 — 2026-09-21 No release notes. --- *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 2026-10-24.*