Purpose-Built
Control and analog-filter studio for poles/zeros, transfer functions, Bode magnitude/phase, crossover and margins, time-response screening, biquad design, and parameter sweeps.
One-time iPhone and iPad app
Bodecraft
Filters, loops and stability
Core Features
- Four-decade Bode sweep
- Crossover and phase-margin screen
- Delay and damping scenarios
- Offline PDF analysis packet
Private by Design
No account, subscription, ads, tracking, third-party analytics, or developer-operated backend. Core features work offline, and your work stays on device unless you deliberately share or export it.
Use It Responsibly
Control and filter results are educational engineering aids. Verify plant models, component tolerances, stability margins, hardware limits, and safe commissioning independently.