# EEPocketworkbench — Electrical Engineering tools > Electrical Engineering tools (iPhone/iPad app by Shashwat Patel.) - Source: https://appshunter.io/ios/app/eepocketworkbench/id6804277177 (this page in markdown: same URL + `.md`) - Developer: [Shashwat Patel](https://appshunter.io/developer/1873309489) - Category: Utilities, Education - Price: $2.99 - Age rating: 12+ - Requires: iOS 17.6 · 1 MB - Languages: American English - Released: 2026-09-03 - Data updated: 2026-09-09 - User reviews in markdown: https://appshunter.io/ios/app/eepocketworkbench/id6804277177/reviews.md ## What is EEPocketworkbench? 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. ## Version history (last 3 releases) ### 3.0 — 2026-09-05 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 ### 2.0 — 2026-09-04 Wire Gauge & Ampacity (AWG reference + run resistance) 555 Timer (astable/monostable) Standard Values (E12/E24/E96 nearest-value finder) Zener Regulator LM317 Regulator Wavelength/Antenna converterOhm's Law solver + voltage divider Reactance & resonance (capacitive, inductive, LC) RC/RL time constants PCB trace width (IPC-2221) Series/parallel R & C Delta ↔ Wye converter LED series resistor Capacitor charge/energy SMD resistor code decoder dB/dBm/watts converter Skin depth Battery life estimator Component Scanner — resistor/inductor (color bands) + capacitor (OCR), still noted as "actively improving" given the accuracy issues we debugged Keyboard "Done" button on all numeric fields App icon (resistor/capacitor/inductor row) and privacy policy, both finished ### 1.0 — 2026-09-03 No release notes. ## More apps by Shashwat Patel - [Mathsjp](https://appshunter.io/ios/app/mathsjp/id6758519849) - [Chess9](https://appshunter.io/ios/app/chess9/id6758634392) - [Stratium](https://appshunter.io/ios/app/stratium/id6761775895) - [MarsMissionPro](https://appshunter.io/ios/app/marsmissionpro/id6761924727) - [CNC Utility Pro](https://appshunter.io/ios/app/cnc-utility-pro/id6761950958) - [InboxGuard](https://appshunter.io/ios/app/inboxguard/id6762069042) All apps by Shashwat Patel: https://appshunter.io/developer/1873309489 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-09.*