EEPocketworkbench

Electrical Engineering tools

$2.99 · Designed for iPad. Not verified for macOS.

26 calculators, a circuit solver, and 27 illustrated lessons A complete electrical engineering calculator suite in your pocket — Ohm's Law, reactance, trace width, and more. No ads, no subscription, no nonsense. Pocket Workbench is a complete electrical engineering calculator suite built for engineers, technicians, students, and hobbyists — the tools you actually reach for at the bench, in the field, or mid-design. No ads. No subscription. No account required. Just the calculators you need, done right. CORE CALCULATORS Ohm's Law solver — instantly solve for voltage, current, resistance, or power from any two known values Voltage divider calculator Reactance & resonance — capacitive reactance, inductive reactance, and LC resonant frequency RC/RL time constants — including capacitor charging voltage over time PCB trace width calculator — IPC-2221 standard, internal/external layers, any copper weight Series/parallel resistor & capacitor combinations Delta (Δ) ↔ Wye (Y) network converter LED series resistor calculator Capacitor stored charge & energy SMD resistor code decoder (3/4-digit and R-notation) dB power ratio, voltage ratio, and dBm ↔ watts converters Skin depth calculator with material presets Battery life estimator COMPONENT SCANNER (bonus feature) Point your camera at a resistor, inductor, or capacitor and Sohm will attempt to read its value automatically — color bands for resistors and inductors, printed codes for capacitors. This feature is actively improving; the calculators above are the reliable core of the app. Built for real work: clean interface, fast input, accurate formulas — nothing you have to dig through menus to find. Whether you're laying out a PCB, sizing a trace, decoding a resistor, or just double-checking Ohm's Law at 2am, Pocket Workbench has it covered.

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Tap-to-place interactive circuit builder (resistors, batteries, wires, ground) on a grid Real Modified Nodal Analysis solver (the same technique SPICE-family simulators use) — solves for every node voltage and component current/power, not a simplified approximation Hand-verified against textbook series/parallel test cases Learn tab — now with diagrams: 27 educational articles covering the theory behind every calculator, organized into 6 categories 19 of those now have a native vector circuit diagram (Ohm's Law loop, resistor bands, capacitor/inductor symbols, reactance curve, series/parallel, dividers, Wheatstone bridge, delta-wye, RC charging curve, Zener regulator, transformer, resonance, RMS waveform, op-amp, trace cross-section, skin effect, wavelength, 555 timer) 26 calculators total, spanning: Core: Ohm's Law, voltage divider, reactance/resonance, RC/RL time constants, PCB trace width Combinations: series/parallel, delta-wye, standard values (E12/E24/E96), Wheatstone bridge, current divider Components: LED resistor, capacitor charge/energy, SMD code, wire gauge/ampacity, 555 timer, op-amp gain Power Design: Zener regulator, LM317, transformer ratio, thermal resistance, fuse sizing, battery C-rate RF & Power: dB/dBm/watts, skin depth, wavelength/antenna, RMS/peak converter Field: battery life estimator Retention & UX features: Calculation history (save/export as CSV/clear) Favorites (star any tool) Share result as image Scan log / informal parts bin (auto-tracks scanner readings + quantities) First-launch onboarding walkthrough App Store review prompt (triggers after real usage, not on launch) Home screen Quick Actions Colorful UI — category-coded icon tiles, brand accent tint Keyboard "Done" button everywhere

Version 3.0

The developer, Shashwat Patel, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Shashwat Patel
    Size
    • 1.5 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 17.6 or later.
    • iPhone
      Requires iOS 17.6 or later.
    • iPad
      Requires iPadOS 17.6 or later.
    • Mac
      Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.3 or later.
    Languages
    • English
    Age Rating
    13+
    Copyright
    • © 2026 Shashwat Patel
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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