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Software · Education & science

Fityk

Fityk is a data analysis program, available on Linux. Old edition (2016).

  • Completely free
  • Linux
  • Open source
  • Old edition (2016)

Old edition: the latest known version (v1.3.1) dates from 21 December 2016. It is no longer recommended as current software; the package date does not mean the software is still maintained.

Overview

Fityk is a data analysis program, available on Linux.

Old edition: the latest known version (v1.3.1) dates from 2016; it is no longer presented as current software.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Open-source curve-fitting and data analysis software.” — official website, 10 November 2026

At a glance

Fityk is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (GPL-2.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

Fityk [fi:tik] is a program for data processing and nonlinear curve fitting. Primarily used: by scientists who analyse data from powder diffraction, chromatography, photoluminescence and photoelectron spectroscopy, infrared and Raman spectroscopy, and other experimental techniques, to fit peaks – bell-shaped functions (Gaussian, Lorentzian, Voigt, Pearson VII, bifurcated Gaussian, EMG, Doniach-Sunjic, etc.), but it is suitable for fitting any curve to 2D (x,y) data.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 9 November 2026
  • Description from Flathub — AppStream (Flathub)

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