QR Reader & Code Generator vs Prism Tape Calculator

QR Reader & Generator is a fast, private, and completely free QR and barcode app. No ads, no data collected, no account. SCAN ANYTHING Scan QR codes and barcodes with your camera or straight from a photo. Pinch to zoom, tap to focus, batch scan, and use the flashlight in the dark. SMART RESULTS The app understands what you scanned: join Wi-Fi, save contacts, add calendar events, open locations in Maps, and look up products. Copy any field with one tap. LINK SAFETY CHECK Every link is checked on your device before it opens. Shortened links, lookalike domains, and other phishing tricks are flagged. Nothing is ever sent to a server. CREATE YOUR OWN QR CODES Make codes for links, Wi-Fi, contacts, email, SMS, phone, location, and calendar events. Pick colors and styles, preview live, and export as PNG or vector SVG. YOUR HISTORY Unlimited history with search, filters, favorites, notes, and CSV/JSON export. DESIGNED FOR EVERYONE Clean design with large, easy-to-read text and buttons. VoiceOver support. Private by design — no ads, no tracking, no data collected.

Prism Tape Calculator is a calculator with a paper tape. Every line you enter is printed above the keys, the answer updates as you type, and you can tap any earlier result to use it again — with no ads, no tracking and no subscription. THE TAPE • Every calculation you commit is printed to the tape, newest at the bottom, like an adding machine. • The last few lines stay visible above the display, so you always have context. • Tap any line to drop its result into what you are typing now. • Open the full tape to scroll back through everything, swipe to delete a line, or clear it all. • The tape is stored on your device and is there when you come back. SEE THE WHOLE EXPRESSION • The full expression stays on screen — 1,250 × (1 + 8.25%) — not one number at a time. • The result previews live under it before you press equals, so typos are caught before they cost you. • Backspace removes one key at a time (a whole function like sin( in one go). • Press an operator after equals to keep going from the last answer; ans is always a key away. MATH YOU CAN TRUST • Decimal arithmetic: 0.1 + 0.2 = 0.3, exactly. Money math without floating-point surprises. • Percent that behaves the way people mean it: 200 + 15% = 230, 50 − 10% = 45, 20 × 5% = 1. • Thousands separators, sensible rounding, and scientific notation only when a number really needs it. • Clear error messages instead of a mystery “Error”: divide by zero, unbalanced parentheses, invalid input. SCIENTIFIC WHEN YOU NEED IT • Tap sci (or rotate to landscape) for parentheses, powers, roots, sin, cos, tan, ln, log, factorial, π and e. • Degrees or radians. Implicit multiplication works: 2π and 3(4 + 1) mean what you expect. DESIGNED FOR THE PHONE IN YOUR HAND • Big rounded keys sized to your screen, haptic feedback, light and dark mode. • The whole app is a few megabytes and opens instantly. Works completely offline. • VoiceOver reads the expression and every tape line. Supports Dynamic Type. PRIVATE BY DESIGN • No ads. Ever. • No account, nothing to sign in to. • No analytics, no advertising SDKs, no third-party code. • Nothing leaves your device. Prism Tape Calculator is free and fully unlocked, made by Prism Data Group. — Support: https://prismdatagroup.com/prismtapecalculator/support Privacy Policy: https://prismdatagroup.com/prismtapecalculator/privacy Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/