# Prism Tape Calculator — Live tape. No ads. Exact math. > Calculator with a persistent paper tape for tracking and reusing calculations. (iPhone/iPad app by George Field.) - Source: https://appshunter.io/ios/app/prism-tape-calculator/id6802276077 (this page in markdown: same URL + `.md`) - Developer: [George Field](https://appshunter.io/developer/1828914617) - Category: Utilities, Productivity - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 1 MB - Languages: American English - Released: 2026-09-01 - Data updated: 2026-09-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/prism-tape-calculator/id6802276077/reviews.md ## What is Prism Tape Calculator? 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/ ## Key features - Persistent paper tape for calculations - Live result previews as you type - Tap previous results to reuse - Full expression visible on screen - Decimal arithmetic for precise math - Scientific functions available ## Frequently asked questions about Prism Tape Calculator ### What is Prism Tape Calculator? Prism Tape Calculator is a calculator app that features a persistent paper tape. This tape displays every calculation as you enter it, allowing you to easily review past entries and reuse previous results. It aims to provide exact math without ads or tracking. ### Does Prism Tape Calculator have ads? No, Prism Tape Calculator is completely ad-free. The developers explicitly state 'No ads. Ever.' and emphasize that no third-party code or tracking is used, ensuring a private user experience. ### How does the paper tape feature work in Prism Tape Calculator? The paper tape shows each calculation line above the keys, similar to an adding machine. You can scroll through the full tape, tap any earlier result to use it in a new calculation, or swipe to delete lines. The tape is stored on your device. ### Is Prism Tape Calculator suitable for financial calculations? Yes, Prism Tape Calculator uses decimal arithmetic for exact math, meaning 0.1 + 0.2 equals 0.3 precisely. This avoids floating-point surprises, making it ideal for money math and other sensitive calculations. ### What scientific functions are available in Prism Tape Calculator? When in scientific mode (or landscape orientation), Prism Tape Calculator offers parentheses, powers, roots, trigonometric functions (sin, cos, tan), logarithms (ln, log), factorial, pi, and e. It also supports degrees or radians. ### Can I use Prism Tape Calculator offline? Yes, Prism Tape Calculator works completely offline. The app is designed to be lightweight, opening instantly and requiring no internet connection for its core functionality. ### What devices is Prism Tape Calculator available on? Based on the provided data, Prism Tape Calculator is currently supported on iPhone. It is designed with features like VoiceOver and Dynamic Type support for accessibility. ### How often is Prism Tape Calculator updated? Prism Tape Calculator was last updated on September 1, 2026, with version 1.0. This indicates it is a new release, and further updates will likely follow based on user feedback and development plans. ## Version history (last 1 release) ### 1.0 — 2026-09-01 No release notes. ## More apps by George Field - [30 Second Timer 2](https://appshunter.io/ios/app/30-second-timer-2/id6749148793) - [Blocktionary](https://appshunter.io/ios/app/blocktionary/id6775211963) - [Mimora](https://appshunter.io/ios/app/mimora/id6775823535) - [Bank Blast](https://appshunter.io/ios/app/bank-blast/id6779285267) - [Mahjong Universe](https://appshunter.io/ios/app/mahjong-universe/id6785221111) - [TadpoleAI](https://appshunter.io/ios/app/tadpoleai/id6789558696) All apps by George Field: https://appshunter.io/developer/1828914617 --- *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 2026-09-05.*