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PhreeFit

PhreeFit is a desktop application for fitting and analyzing surface complexation models (SCMS). It is designed for parameter optimization, result visualization, and sensitivity analysis of titration and adsorption experiment data.

Key Features

  • Titration and general SCM analysis workflows.
  • Support for NEM, CCM, and CD-MUSIC surface complexation models.
  • Differential Evolution, Dual Annealing, and Nelder–Mead optimization algorithms.
  • Configurable initial values and fitting bounds for all parameters, including surface sites, reaction constants, charge parameters, and capacitance parameters.
  • Parameter sensitivity analysis.

Installation

The PhreeFit installation packages include the components required to run the application. You do not need to configure a Python environment or compile the source code.

macOS

Supported platform: Macs with Apple silicon, including M1, M2, M3, and M4 processors.

  1. Download PhreeFit-1.0.0-arm64.dmg.
  2. Double-click the DMG file to open it.
  3. Drag PhreeFit into the Applications folder.
  4. Open PhreeFit from the Applications folder.

If macOS reports that it cannot verify the developer when the application is opened for the first time, confirm that the package came from a trusted PhreeFit release, then go to System Settings → Privacy & Security and select Open Anyway.

The current DMG is built for arm64 and does not support Intel-based Macs.

Windows

Supported platform: 64-bit Windows 10 or Windows 11.

  1. Download the Windows installer whose filename ends in setup.exe.
  2. Double-click the installer and follow the setup wizard.
  3. Start PhreeFit from the Start menu or desktop shortcut.
  4. To uninstall PhreeFit, open Settings → Apps → Installed apps, locate PhreeFit, and select Uninstall.

If Microsoft Defender SmartScreen displays a warning during installation, first confirm that the installer came from a trusted PhreeFit release, then follow the Windows prompts to continue.