Spice on iPhone
Finally useful spice simulator on iPhone, can do simulation during travel. Waiting for multiple devices such as android, desktop or web and sync between them
Free
About
Design and analyze analog, digital, and RF circuits directly on your iPhone or iPad. Explore circuit behavior with various simulations and visualize results on clear plots. Supports SPICE model import and local project exploration.
✓Schematic building
✓DC operating point analysis
✓AC and transient analyses
✓S-parameter analysis
✓Smith chart visualization
✓SPICE model import
✓Local simulation
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What's New in Tersa
1.0.2
October 12, 2026
• Added reliable offline project access and synchronization after reconnecting. • Fixed project renaming and migration of existing projects to an account without duplicates. • Improved analysis setup, simulation execution, tuner updates and RF plot calculations. • Double-tap a component to start a connection faster. Wire routing and junction editing are also improved. • Added feedback from Settings with an optional reply email. • Improved component and schematic properties, error messages, performance and touch interactions.
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FAQ
What types of circuits can I simulate with Tersa?
Tersa supports the simulation of analog, digital, and RF circuits. You can build editable schematics and perform analyses like DC sweep, AC, and transient simulations.
Does Tersa require an internet connection to simulate circuits?
No, all simulation runs locally on your device. This means you can design and analyze circuits even without an internet connection.
Can I import custom component models into Tersa?
Yes, Tersa allows you to import supported SPICE model cards and subcircuits. This enables you to use specific components when your circuit design requires them.
How does Tersa help with learning about circuits?
Tersa includes local sample projects, such as RC and LC filters, to help you explore circuit behavior. You can easily change component values and re-run analyses to understand their impact.
What kind of analysis results can I expect from Tersa?
You can inspect measurements on clear plots for various analyses. For linear two-port work, Tersa provides S11, S12, S21, and S22 parameters, as well as return and insertion loss on a Smith chart.
Is Tersa suitable for professional circuit design and fabrication?
While Tersa is a powerful tool for learning and review, results depend on the circuit, models, and settings. Independent verification is recommended before fabrication or safety-related use.
What devices is Tersa compatible with?
Tersa is designed for touch-first interaction and is compatible with iPhone and iPad devices.
How often is Tersa updated?
The latest version of Tersa is 1.0.2, and it was last updated on October 12, 2026. Updates typically bring improvements and new features.
