Tersa vs EveryCircuit for mobile circuit simulation

01

Choose the measurements you need

Both products offer interactive circuit work on mobile devices. Tersa is worth evaluating when the task includes linear two-port S-parameters, a Smith chart and component tuning on iPhone or iPad. EveryCircuit combines animated circuit behavior with transient and small-signal AC analysis; its Bode plots make it useful beyond introductory animation.

• Tersa: DC operating point, DC sweep, AC and transient analysis
• Tersa: S11, S12, S21, S22 and complex Smith chart views
• EveryCircuit: real-time transient simulation and AC gain/phase
• EveryCircuit: interactive analog/digital learning and public circuit examples

02

Mobile SPICE is not one compatibility standard

EveryCircuit describes its custom engine as SPICE-like. Tersa supports selected SPICE model cards and subcircuits. Neither description alone establishes that your existing netlist, vendor model or simulation directives will work unchanged. Standard model import and an S-parameter/Smith workflow were not verified in the reviewed EveryCircuit documentation; that is not proof those capabilities are absent.

• Check the exact components and model syntax required by your circuit
• Do not treat an ordinary AC voltage plot as a two-port S-parameter measurement
• Compare reference impedance, source and load assumptions
• Use an independently checkable circuit before moving a larger project

03

When to keep EveryCircuit, and when to try Tersa

Keep EveryCircuit in the shortlist if animated explanations, public examples or Android access are central to your work. Try Tersa when a touch-first iPhone/iPad RF measurement loop is the main requirement. Tersa is also released for Android on Google Play. Its separate Web CAD workspace should not be assumed to have identical features or automatic project transfer.

• EveryCircuit free personal circuits currently have a five-component limit; check its current plans
• Tersa is currently listed as free in the App Store; availability can differ by region
• This comparison is published by the Tersa team, not an independent testing lab
• Capabilities were checked in official documentation on October 8, 2026; no comparative performance test was run

Compare other mobile and browser simulators. See Breadpad, iCircuit and CircuitSim alongside Tersa and EveryCircuit.