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Growth · alternatives · 2026

24 alternatives to CurveFit

A powerful curve fitting software

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

  1. 1

    This is a powerful online curve fitting tool that supports fitting dozens of commonly used functions and implicit functions. It features a clean interface and simple operation. If you need to perform curve fitting but don't want to learn professional software like Matlab or Origin, you can try this tool.

    Nov 2025 · byx2000.github.io · its alternatives →

  2. 2

    Python 3 tkinter graphical curve fitting and surface fitting application, saves results to PDF. - zunzun/tkInterFit

    2016 · github.com · its alternatives →

  3. 3

    The AI OS for the fitness industry

    2024 · spur.fit · its alternatives →

  4. 4

    Measure and improve your product market fit

    2020 · its alternatives →

  5. 5

    Measure your product-market fit using data you already have

    2021 · drive.google.com · its alternatives →

  6. 6
    Durves▲127

    The curve design pattern tool

    2023 · durves.com · its alternatives →

  7. 7

    No-code toolkit for data-driven marketing

    2021 · its alternatives →

  8. 8
    Flat▲409

    Simple, delightful, collaborative work tracking

    2024 · flat.app · its alternatives →

  9. 9

    A scale that digitizes your body in photorealistic 3D! 💪

    2017 · shapescale.com · its alternatives →

  10. 10
    Planfit▲329

    Personalized workout coaching w/ machine learning + ChatGPT

    2023 · planfit.ai · its alternatives →

  11. 11AN

    I’ve been heads-down for the last month or so working on a new spline, and now I’m excited to show it to the world. It is a continuation of the Spiro work I did for my PhD thesis, and solves most of the problems that held that back from wider popularity.

    2018 · raphlinus.github.io · its alternatives →

  12. 12

    A bezier curves & spring motion editor + code exporter

    Dec 2025 · its alternatives →

  13. 13

    Hello HN, It has been a while since I contributed to the web, so I decided to get back in shape and publish "something". This app is a POC of "what if diagrams were more dynamic". I'm a software engineer by trade, and with conventional tools, I often times struggle to explain flows of data in complex software systems. I got inspired by video games like The Incredible Machine and Factorio, as in some ways, software systems tend to become Rube Goldberg-esque machines ;) As a side quest, I also wanted to craft diagrams faster than text-based tools (ex: mermaid), as I am always forgetting their…

    2024 · github.com · its alternatives →

  14. 14ZC

    The full Python source code for zunzun.com online curve and surface fitting is at https://bitbucket.org/zunzuncode/zunzunsite3

    2018 · its alternatives →

  15. 15

    Interactive curve fitting experiments without friction

    Apr 2026 · share.streamlit.io · its alternatives →

  16. 16

    Turn ideas into assets

    2023 · linearity.io · its alternatives →

  17. 17

    Simplify your ideas with smart flowcharts

    2024 · beta.flowsage.co · its alternatives →

  18. 18

    All your metrics in one place.

    2015 · supermetrics.com · its alternatives →

  19. 19

    Measure product/market fit in app with your users.

    2021 · its alternatives →

  20. 20
    WayFit▲92

    From workout to nutrition, we help you monitor your activity

    2024 · wayfit.ca · its alternatives →

  21. 21
    Mathfox▲67

    Solve math problems on the go with ease

    2022 · mathfox.vercel.app · its alternatives →

  22. 22

    FlexFile is a simple way to log and track your workouts

    2016 · its alternatives →

  23. 23

    Tune the network. Fit the curve. A curve-fitting game built around a real neural network.

    Jul 2026 · neuralfit.ai201.site · its alternatives →

  24. 24ID

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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 →