Tersa: Circuit Simulator

Tersa is a touch-first SPICE workbench for analog circuits and lumped RF experiments on Android.

Move from schematic to result in one focused workflow: create a circuit, choose an analysis, add measurements, inspect plots, tune component values, and save your work locally.

WHAT YOU CAN DO

• Build schematics with components, wires, ports, and ground
• Run operating-point, DC, AC, and transient analyses
• Inspect voltage and current measurements
• Plot frequency-domain and time-domain results
• Analyze passive lumped two-port S11 and S21 results
• Inspect return loss, insertion loss, and Smith chart trajectories
• Tune component values and view updated results
• Use project-local SPICE .model and .subckt definitions
• Open editable sample projects

LOCAL-FIRST

You can continue locally without creating an account. Projects remain on your device. Account access is optional.

DESIGNED FOR ENGINEERING WORK

Tersa is built for filters, matching networks, RC and RLC circuits, passive RF networks, and focused what-if experiments. The touch-oriented interface keeps analysis settings, measurements, plots, and tuning connected to the circuit.

For support or feedback, contact [email protected].