AGS SPIA, a versatile processing and inversion software, is designed for ground-based Time-domain Electromagnetic (TEM) and Direct Current/Induced Polarisation (VES) data. Integrating the robust and fast AarhusInv inversion code, SPIA features a user-friendly graphical interface, facilitating the editing of data and models directly within the software. This innovative platform supports a range of inversion methods, including Resistivity, Cole-Cole, and Maximum Phase Angle (MPA), catering to TEM data affected by IP effects.