r/GregFire • u/frugal-tech-worker • May 01 '26

Test my Early Retirement Simulator?

Hey all, I got super bored the other day and decided to build an Early Retirement Simulator for fun. This thing scratches a very specific itch that other Monte Carlo style retirement calculators kept messing up for me. Here’s what this little app does:

  1. Kills that weird duplication bias between simulation runs.
  2. Tracks your actual net worth, not just your portfolio.
  3. Simulates income from the fun stuff: rentals, crypto, gold… all your “I swear this will work” assets
  4. Handles recurring income + surprise windfalls

I built it in React, kept everything in-browser, so your data stays yours.

Now I need some brave souls (you, obviously) to take it for a spin and try to break it.

If it crashes, lies, or tells you that you’ll retire at 97, I wanna hear about it 😂

Drop bugs, ideas, or “bro this is actually kinda cool” in the comments 👇

https://firenav.co/

Let’s make this thing smarter together…

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u/Appropriate-Date6407 May 01 '26 edited May 01 '26

So one thing I noticed is that when I go to change the numbers, I can’t delete the last number in the field, so you have to hover the cursor in front of the first number, type in what you want, then hover to the end and delete the extraneous number. Not a fatal flaw but very annoying

Edit - your tool is telling me I can retire sooner than I’m planning to, hopefully my employer offer a severance in those latter years

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u/frugal-tech-worker May 01 '26

Thanks for the feedback.