This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
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.
Hey everyone 👋
I kept hitting the same thing with finance calculators online — you punch in some numbers, get a big total, and that's it. No sense of why the number is what it is, or what actually moves it.
So I made Rionux. It's a growing collection of investing calculators, but the point isn't really the math — it's understanding it. Each one walks through what's happening behind the result and shows it in today's money, based on your own assumptions, so it feels honest rather than a shiny projection. It's free, runs in your browser, no account, and it's meant to teach — not to give advice.
It's still early and I'm adding to it, so I'd genuinely value your honest take — what's clear, what isn't, and what you'd want to see next. Thanks for taking a look
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?
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?
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.
About Rionux on Product Hunt
“Free investing calculators that explain the why”
Rionux was submitted on Product Hunt and earned 0 upvotes and 4 comments, placing #94 on the daily leaderboard. 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.
Rionux was featured in Fintech (47.2k followers), Investing (26.7k followers) and Personal Finance (2.9k followers) on Product Hunt. Together, these topics include over 29.3k products, making this a competitive space to launch in.
Who hunted Rionux?
Rionux was hunted by Rionux. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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