For terminals, orpie: https://github.com/pelzlpj/orpie https://github.com/pelzlpj/orpie (source) https://opensource.com/article/19/1/orpie https://opensource.co

For terminals, orpie: https://github.com/pelzlpj/orpie https://github.com/pelzlpj/orpie (source) https://opensource.com/article/19/1/orpie https://opensource.com/article/19/1/orpie (demo) For Android, RealCalc: https://play.google.com/store/apps/details?id=uk.co.nickfines.RealCalc&hl=en_US https://play.google.com/store/apps/details?id=uk.co.nickfine...