Work · alternatives · 2026
24 alternatives to The Tortoise – a sophisticated retirement calculator
Hi HN! I've been working on this calculator for some time now. It started off as a tool to help me do some retirement planning and I think it could be broadly useful to others as well. It's very generic, which is both good and bad. Good, because you are not beholden to the assumptions of the model, like in many other calculators. This also means that it’s not US centric. On the other hand, you do need a bit of financial planning knowledge to be able to use it effectively. There are many retirement calculators out there -- here's what I think The Tortoise does better than most: 1. An easy to…
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. The Tortoise – a sophisticated retirement calculator launched in 2022; newer entries below may have overtaken it.
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Investment Calculator is a beautifully simple calculator to help you calculate the potential value of your retirement investments and visualize their growth. Based on your inputs, we also make suggestions on how to increase your investment savings.
2018 · investmentcalculator.io · its alternatives →
- 2
How early can you 🍹retire if you move to another place?
2018 · nomadlist.com · its alternatives →
- 3
Easily track your net worth and find your retirement age
2023 · its alternatives →
- 4IQ
Quick background: I used to code. Studied it in school, wrote some projects, but eventually convinced myself I wasn't cut out for it. Too slow, too many bugs, imposter syndrome — the usual story. So I pivoted, ended up as an investment associate at an early-stage angel fund, and haven't written real code in years. Fast forward to now. I'm a Buffett nerd — big believer in compound interest as a mental model for life. I run compound interest calculations constantly. Not because I need to, but because watching numbers grow over 30-40 years keeps me patient when markets get wild. It's basically…
Jan 2026 · calquio.com · its alternatives →
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Most retirement calculators either oversimplify things or ask you to link your accounts so they can make money off your data. I wanted something that actually helped me see if I was on track without handing over a bank login, so I built RetireNumber. It's a privacy-first retirement planner. You type in your own numbers. No account linking, no selling your data, no VC. Just me and a subscription. The engine does real math: Monte Carlo with 1,000 runs, historical backtesting to 1928 using Shiller's Yale data, tax-aware withdrawal strategies, and scenario comparison so you can try different…
Feb 2026 · retirenumber.com · its alternatives →
- 7SR
Use this planner to explore the health of your retirement plan. Estimate your retirement income and explore different investment strategies.
2015 · letscrunchit.com · its alternatives →
- 8RC
2020 · lunchmodel.com · its alternatives →
- 9
Calculate your Systematic Withdrawal Plan
2025 · swp-calculators.com · its alternatives →
- 10TC
Made this using Power BI and the Crypto Watch API. Started making this in November 2021, but never got around to publishing it, so that is the reason for the 'FOMO' in the title - probably a good thing if you 'missed out' on the crypto hype late last year. Now it serves as a way to see how much you 'saved' by not putting in money. Hope someone finds it fun!
2022 · vidacode.github.io · its alternatives →
- 11
A modern investment calculator: Fast, clean, & ad-free
2025 · deadsimple.tools · its alternatives →
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A free & unique retirement tools site to help educate people
2021 · retireanyage.com · its alternatives →
- 15
A complete retirement planner covering accounts, taxes, pensions, withdrawals, and life events, stress-tested against thousands of simulations drawn from over a century of real market history. Start with a free quick check, no sign-up required.
Aug 2026 · foresightplanner.com · its alternatives →
- 16
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- 18
Financial Independence / Retire Early (FIRE) Calculator for the UK
2023 · fire.picheta.me · its alternatives →
- 19
I always spent more than planned so I decided to try budgeting applications. It turns out you need to be an accountant or a control freak for those apps. So I made Paktol with extreme simplicity & efficiency in mind. My sole goal is to spend less than I planned. Where Paktol differs: - you define a monthly goal - every month your position starts at $0 and it increases every second - when you add an expense you will either stay in green if above your position or go in red and we tell you how long you have to wait It's simple, boring and not sexy but it works for me (and friends/family).…
2024 · paktol.t10s.com · its alternatives →
- 20
How long will it take you to save up for retirement? This interactive early retirement calculator will estimate your retirement age for a range of inputs.
2018 · engaging-data.com · its alternatives →
- 21WC
2012 · networthify.com · its alternatives →
- 22
Comprehensive financial planning tools
2025 · smartinvestreturns.com · its alternatives →
- 23
A modern and simple retirement (or FIRE) calculator.
2024 · its alternatives →
- 24
Flexible spending retirement planner with realistic modeling
2025 · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →