Launched this week
Rionux
Free investing calculators that explain the why
17 followers
Free investing calculators that explain the why
17 followers
Rionux is a growing set of free investing calculators built around one idea: don't just give you a number, help you understand it. Each tool shows the reasoning behind the result with clear charts and plain-language insights, in today's money and based on your own assumptions. Made for long-term investors, no signup, no advice — just clarity.
How do you keep the "plain-language insights" accurate without crossing into actual financial advice territory, especially for longer time horizons where assumptions can shift a lot?
How do you decide which calculators to build out next, and do the insights adapt if I tweak assumptions like inflation or contribution changes over time?
Really like how each calculator explains the "why" behind the number instead of just spitting out a result. The inflation-adjusted chart made a future value projection click for me in a way most finance tools never do.
Really like how the calculators show their work instead of just spitting out a number, the inflation-adjusted view is genuinely useful for sanity-checking my retirement assumptions.
The plain-language insights alongside the numbers genuinely helped me wrap my head around compounding over time. No signup friction made it easy to poke around and adjust assumptions without committing to anything.
Tried the DCA calculator and the breakdown of why your average cost ends up where it does was genuinely helpful, not just a number on a screen. Love that there's no signup wall blocking the useful stuff.