This dataset contains the MATLAB and Python implementations of i-Rheo Tempo, an open-access analytical framework for reconstructing the time-dependent shear relaxation modulus G(t)from frequency-domain rheological data. The tool enables model-free, high-resolution viscoelastic characterisation across broad timescales. The dataset includes source code, example datasets, and documentation (README). It is intended to support reproducibility and facilitate adoption by the rheology and soft matter communities.