Singular: Circuit Simulator
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Description
Singular is a professional-grade analog & logic circuit simulator designed for your iPhone and iPad. Build, simulate, and analyze electronic circuits with an intuitive drag-and-drop editor and a powerful real-time simulation engine — no internet required.
Whether you're an electrical engineering student studying for exams, a maker prototyping your next project, or a professional verifying a design, Singular gives you a complete electronics workbench in your pocket.
POWERFUL SIMULATION ENGINE
Modified Nodal Analysis (MNA) with TR-BDF2 adaptive solver
Real-time transient, DC, and AC analysis
Frequency-aware adaptive timestep — accurate results at any speed
Newton-Raphson nonlinear convergence for semiconductors
Hot-swap: modify your circuit while simulation is running
40+ ELECTRONIC COMPONENTS
Passive — Resistor, Capacitor, Inductor, Potentiometer
Sources — DC Voltage, AC Voltage, Pulse Generator
Diodes — Standard Diode, Ideal Diode, LED
Transistors — NPN, PNP, Darlington PNP, N-MOSFET, P-MOSFET
Integrated Circuits — NE555 Timer, Operational Amplifier (Op-Amp)
Logic Gates — AND, OR, NAND, NOR, XOR, XNOR, Inverter, Buffer
Flip-Flops — D, JK, T Flip-Flop, SR Latch
Measurement — Voltmeter, Ammeter
Power Rails — Ground, VCC, VDD, VSS, VEE, ±3.3V, ±5V
REAL-TIME OSCILLOSCOPE
Multi-trace display with color-coded signals
Adjustable time base and voltage scale
Pinch-to-zoom and pan gestures
60 fps rendering — smooth and responsive
INTUITIVE CIRCUIT EDITOR
Drag-and-drop component placement with grid snapping
Draw wires by tapping terminals — automatic routing
Rotate, flip, and mirror components freely
Multi-select, move, and organize your design
Full undo/redo history (up to 100 steps)
Pinch zoom (0.1x–5x) and two-finger pan
PROFESSIONAL TOOLS
Design Explorer with automatic reference designators (R1, C2, U3…)
Standard value picker — E12, E24, E96 resistor series and standard capacitor values
Built-in expression evaluator — type "10k*2.2" and get the result instantly
Real-time voltage, current, and power readouts on every component
Net name visualization for complex designs
LEARN & EXPLORE
Built-in example circuits: Voltage Divider, Current Divider, Inverting Amplifier, 555 Timer Demo
Resource Center with reference articles
Detailed simulation error guide — understand what went wrong and why
Save examples to your workspace and modify them freely
SAVE, EXPORT & SHARE
Save unlimited circuits to your workspace
Export circuits as portable .circuit files with embedded thumbnails
Import circuits from other users or devices
Add names, descriptions, and metadata to every project
DESIGNED FOR iPAD & iPHONE
Built 100% with SwiftUI for a native Apple experience
Optimized for both touch and Apple Pencil
Works entirely offline — your data stays on your device
Singular is the circuit simulator that students wish they had during lectures, that makers reach for at the workbench, and that engineers trust for quick verification. Download it and start building.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/