OpalCalc is not available for iPad but there are some alternatives with similar functionality. The best free iPad alternative is GeoGebra Scientific Calculator, which is also Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to OpalCalc and six of them are free and available for iPad so hopefully you can find a suitable replacement. Other interesting free iPad alternatives to OpalCalc are CrossCalc, Omni Calculator, CalcVerter and Scientific Calc and Grapher.
Free online scientific calculator from GeoGebra: perform calculations with fractions, statistics and exponential functions, logarithms, trigonometry and much more!
CrossCalc is day to day Scientific Calculator that can be used on all your devices. It respects your privacy and does not show any ads.
Omni Calculator is a web/mobile calculator that solves concrete problems such as mortgage payment, gross margin, body mass index, break-even point, etc. It's very user-friendly, flexible and usable on web, mobile and as an embeddable web widget.
Easy to use scientific and graphing calculator with no ads! Advanced feature like finding zeros and intersections, as well as trigonometric functions!
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