Units Converter for Engineers vs PDF OCR

Units Converter is a free-form units conversion tool designed for professionals and students of science and engineering. This is the only Units and Currency conversion app you will ever need. It is based on fundamental principle of dimensional analysis which allows you to enter your unit in any form (instead of picking from a predefined list). This method therefore supports any number of combinations. For example: It can effortlessly convert Energy in ton-TNT (tTNT) to kg-km^2/hr^2. If there is a units mismatch, it will identify missing units. Plus dozens of physical constants such as speed of sound, speed of light, gravitation constant, etc. are built-in and can be retrieved by entering their symbol. Supports over 300 single units and over 165 currencies. Currency rates are automatically updated about once a month. Includes prices of gold (XAU), silver (XAG), platinum (XPT), etc. Help notes provide a detailed glossary of all units available. In free version, first text field is locked to a value of 1 and cannot be edited. Purchase 'Unlock all features' on the App Store to enable editing. Check it out.

PDF OCR is the all-in-one PDF app for iPhone and iPad. Scan paper into searchable PDFs, read and mark up any document, edit text right on the page, measure drawings to scale, and convert between PDF, Word and Office files. Everything runs on your device, with no account and no uploads. SCAN & RECOGNIZE TEXT (OCR) • Document scanner: edges are found and pages are straightened for you • Text recognition: scans become searchable, selectable PDFs • Recognize text in scanned PDFs you already have • Scan many pages at once, then reorder, rotate or remove them • Read QR codes • Put two pages on one, like both sides of an ID card • Smart file names suggested from what was scanned (Pro) READ IN COMFORT • Fast viewer with search, contents and bookmarks • Continuous scroll, single page or two-page spread • Reading View: the text reflowed to fit your screen, in your size, font and theme • Night mode and read aloud • Opens where you left off; recent documents appear in Spotlight ANNOTATE & MARK UP • Pen and highlighter, smooth with Apple Pencil • Highlight, underline and strike through text • Notes, shapes, arrows, polygons and stamps • Select anything you added to move or resize it, with undo EDIT PDF LIKE A DOCUMENT (PRO) • Edit text right where it is, in the document's own fonts • Move, delete and add text and images • Redaction removes sensitive text and images for good MEASURE DRAWINGS (PRO) • Distance, perimeter, area and count on plans and drawings • Drawing scales such as 1:100, or calibrate to a length you know • Snaps to corners; totals and CSV export FILL & SIGN • Fill in PDF forms • Draw your signature once and place it on any document • Sign contracts, invoices and applications without a printer CONVERT • PDF to Word (Pro), images, text and RTF • Word, Excel, PowerPoint, Pages and Keynote files to PDF • Photos and web pages to PDF ORGANIZE & OPTIMIZE • Merge PDFs and images; split by selected pages, ranges or every N pages • Reorder, rotate, insert, crop and delete pages • Compress PDFs to make them smaller • Flatten annotations and forms, and print PROTECT • Protect PDFs with a password • Change permissions or remove security (Pro) • Watermarks and page numbers (Pro) • Lock the app with Face ID (Pro) SMART TOOLS, ON YOUR DEVICE • Summaries with Apple Intelligence (Pro; iOS 26 on supported devices) • Page translation (Pro) • Shortcuts actions for OCR, compression and merging (Pro) PRIVATE BY DESIGN Your documents never leave your device. Scanning, text recognition, editing, conversion and summaries all happen on the device. No account, and no watermark on your files. PDF OCR PRO Reading, markup, signatures, scanning and most tools are free, and OCR is free for up to 30 pages per document. Pro adds OCR without page limits, editing text and images, PDF to Word, measuring, advanced split, redaction, watermarks and page numbers, Face ID lock, smart file names, summaries and translation, and Shortcuts actions. Choose monthly, yearly with a 7-day free trial, or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, and can be managed in Settings › Apple Account › Subscriptions. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://layerz.app/pdfocr/privacy