Easy to use, yet powerful

Resolver One is programmable in Python, a programming language designed to be easy to learn and use, while being powerful enough for Google and NASA to use in critical operations.

You can use Python both from code, to extend your spreadsheets, but also directly from inside formulae. This allows you to combine familiar spreadsheet functions with the expressiveness of Python, giving you the best of both worlds.

Custom functions

Spreadsheet functions are good for simple things, but when they become complicated they become fragile and difficult to maintain. Resolver One lets you to replace complicated formulae with Python functions, allowing much more interesting calculations to be applied.

Custom functions are inherently much more maintainable and auditable, since when you make a change in the custom function it is applied automatically everywhere it's called. You never have to worry about cells that use an outdated formula or worry about wrongly-pasted formulae.

See custom functions in action in this short screencast: Custom functions (1m33s).

Rich interface

Resolver One exposes a programming interface so rich you can build entire applications with it. Change a cell's value, colour, appearance or formatting, create buttons, drop-downs, create new worksheets, cache values between recalculations and more.

Discoverability

Learning a new programming language and a new program may sound like hard work, but Resolver One's unique architecture makes it easy. In Resolver One, the spreadsheet is the program, so the formulae are turned into Python expressions you can easily copy, paste and modify to your liking.

Modular and reusable

Since Python is a full-featured programming language, you can take advantage of its modularity and extract commonly-used functions into external modules. That means that you can store them in a central location, keep them under version control and use them from multiple spreadsheets. Also, when a bug is fixed in a module, all the spreadsheets that use it will pick the change automatically.