Calculation Machine vs Twin Calc

Step back in time and rediscover the nostalgia of classic calculators with Calculation Machine, a meticulously crafted iOS app that captures the essence of those iconic devices. Immerse yourself in the familiar design and intuitive interface as you perform everyday calculations with a touch of retro flair. Features: • Authentic Vintage Design: Immerse yourself in the nostalgic charm of classic calculators with Calculation Machine's meticulously recreated design. From the iconic button layout to the retro-inspired display, every detail evokes memories of simpler times. • Intuitive Functionality: Enjoy effortless calculations with Calculation Machine's user-friendly interface. The familiar layout and responsive buttons make it easy to perform basic and advanced calculations, just like your trusty classic calculator of yesteryear. • Essential Calculation Functions: Access a comprehensive suite of calculation functions, including basic arithmetic, scientific operations, memory storage, and percentage calculations. Vintage Calculator is your versatile companion for everyday math tasks. • Vintage Charm, Modern Convenience: Experience the nostalgic appeal of classic calculators without compromising on modern convenience. Calculation Machine supports various screen sizes and orientations, ensuring seamless compatibility with your iOS device. Why Calculation Machine? • Reignite Nostalgia: Recapture the fond memories of using classic calculators, a symbol of simplicity and reliability. • Embrace Authenticity: Experience the genuine look and feel of classic calculators, meticulously recreated for an immersive retro experience. • Simplify Calculations: Enjoy effortless calculations with a user-friendly interface and familiar layout, reminiscent of classic calculators. • Unleash Versatility: Access a wide range of calculation functions, from basic arithmetic to scientific operations, catering to diverse needs. • Embrace Convenience: Experience seamless compatibility with your iOS device, thanks to support for various screen sizes and orientations. Download Calculation Machine App today and embark on a nostalgic journey through the world of classic calculators!

Twin Calc puts two independent calculators on one screen — a simple calculator app for anyone who has ever wished they had two. Compare two estimates. Split a bill two different ways. Convert on one side while you total on the other. Check last year's numbers against this year's. Open Twin Calc and calculators A and B are already there — no onboarding, no sign-up. Features - Calculator A and B stacked vertically (or side by side in landscape), each fully independent - Works just like the built-in iPhone calculator: + − × ÷, %, ±, backspace, and thousands separators - An expression line shows what you are calculating, so you never lose track - Drag the divider to resize the two calculators; double-tap to reset to half and half - Long-press a result to copy it; swipe left to delete one character - Haptic feedback (can be turned off) - History (tape) keeps your results automatically — tap to copy, or send a result back to A or B - Light and dark themes that follow your system setting - Both calculators and the split ratio are restored exactly as you left them Free - Two calculators, history, and reuse of your 3 most recent results - No ads PRO (one-time purchase) - Never retype a result again: send A's answer straight to B, or swap A and B in one tap - Bring back any past result from history - 3 extra themes: Midnight, Paper, and Mono PRO is a single one-time purchase. No subscription, no extra fees. Everything you calculate stays on your device and is never sent to a server. For iPhone (portrait and landscape).