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***Apple Watch launch sale – 50% off for a limited time***Math is beautiful. Arithmetic is simple. Rechner is both. Experience the world's first gesture based calculator.Features:- Gestural functions for + / x / - / ÷ / = / clear- Additional function buttons for ± / √ / erase- Rolling log of current calculation- 200% more efficientAppleWatch Features:- Force Touch for + / x / - / ÷- Tap the total to clear- Rolling log of current calculation- 100% as efficient (as working on a tiny calculator)We sought to create a calculator that is as beautiful as it is simple. Rechner is that calculator.