Mac menu bar app for viewing and managing local dev servers and ports
Python framework for building and simulating dynamical systems using block diagrams
Stage
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Founded
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Based in
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Pricing model
Free trial
Open source
Pricing
Free trial for 7 days. After trial: $8.99 USD one-time for 1 Mac (early-bird pricing, normally $19.99), $39.99 USD for 3 Macs, $59.99 USD for 5 Macs. One-time purchase with free updates, no subscription.
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Key features
Menu bar display of all listening ports and processes
Kill, restart, and manage dev servers from the menu bar
Live health checks with HTTP status indicators and response times
Live website previews and screenshots of dev servers
Live log streaming and tail capabilities
Project stacks to start multiple servers together
QR code sharing and public HTTPS sharing via cloudflared or ngrok
devports CLI for Terminal and Raycast access
CPU and memory monitoring per server
30+ solvers including implicit, explicit, and adaptive integrators
Zero-crossing detection and scheduled events for hybrid systems
Hot-swappable blocks and solvers during active simulation
Hierarchical subsystems for modular component design
MIMO support with multiple input and output ports
Browser-based visual editor with PathView
Domain toolboxes for chemical, battery, vehicle, flight, and RF engineering
Custom blocks through subclassing the base Block class
Supports continuous-time, discrete-time, and hybrid systems
FMI integration to wrap Co-Simulation and Model-Exchange FMUs
What makes it different
Native SwiftUI app optimized for Mac menu bar with no Electron overhead
Complete local privacy with no account, no analytics, and no data collection
One-time purchase with free updates instead of subscription model
Recognizes and integrates with major development frameworks and tools
Keyboard-first interface designed for developer efficiency
Readable, scriptable alternative to traditional simulation tools with solver depth
Full ecosystem including FastSim Rust engine and standalone C code generation
Minimal runtime dependencies: only numpy, scipy, and matplotlib
Domain-specific toolboxes for chemical, battery, vehicle, flight, and RF engineering
Portlivo