SomeSum 4+

Calculator with Undo/Redo

Michael Welham

    • $0.99


Work faster, easily correct mistakes. SomeSum for macOS - verified on Apple silicon Macs!

Calculator with undo / redo - check & correct your calculations. No more re-entering everything after a single mistake.

Work quickly thanks to dual main and memory displays. See both the main calculator value and the memory value. Both displays support copy and paste from/to the Mac clipboard - paste in values from other apps, and copy the results out to other apps.

Multiple themes, including support for dark mode.

Mac version adds:-
- Keyboard support
- Mac menus
- Mac Help

Includes all standard calculator operations, and also:-

Trigonometric Functions

sin - sine function
cos - cosine function
tan - tangent function

Inverse Trigonometric Functions

sin⁻¹ - arcsin / inverse sine
cos⁻¹ - arccos / inverse cosine
tan⁻¹ - arctan / inverse tangent

Hyperbolic Functions

sinh - hyperbolic sine
cosh - hyperbolic cosine
tanh - hyperbolic tangent

Inverse Hyperbolic Functions

sinh⁻¹ - arcsinh/inverse hyperbolic sine
cosh⁻¹ - arccosh/inverse hyperbolic cosine
tanh⁻¹ - arctanh/inverse hyperbolic tangent


Dedicated buttons for π, ln, log₂, log₁₀, √, ∛, ∜, x√, x², x³, xⁿ, 2ⁿ, 8ⁿ, 10ⁿ, 16ⁿ, ℯ, ℯⁿ

Random/dice - generate random numbers, and simulate a 6-sided dice

Temperature conversions

and more ...

What’s New

Version 1.2

- performance improvements and bug fixes
- new icon

App Privacy

The developer, Michael Welham, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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