EEPocketworkbench vs EarTimer

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.

A quiet break. A focused study session. A reminder through your headphones. EarTimer helps you keep track of time in libraries, shared workspaces, and other quiet places. Set a countdown and hear the timer through connected wired headphones or Bluetooth earphones, including AirPods. MAKE TIME FOR YOUR NEXT TASK • Take a short break between study or work sessions. • Set aside time to read or focus without watching the clock. • Keep track of a quiet rest in a shared space. SET, START, AND STAY IN CONTROL • Choose hours, minutes, and seconds. • Check the current audio output before you start. • Test playback through your connected headphones. • Pause, resume, or cancel a running timer. • See and control your timer in a Live Activity on the Lock Screen, and in the Dynamic Island on supported iPhones. HOW HEADPHONE PLAYBACK WORKS EarTimer starts timer audio when a supported external audio output is connected. If that output disconnects, the app pauses its audio rather than intentionally routing the timer sound to the iPhone speaker. Without headphones, the system timer may still show an alert and vibrate; the selected timer sound does not start. KEEP THESE LIMITATIONS IN MIND Keep EarTimer running; do not force-quit it before your timer ends. Headphone audio is not guaranteed after force-quitting, an iPhone restart, or termination by iOS. Calls, Siri, other audio apps, Bluetooth reconnection, and system conditions can interrupt playback. Reopen EarTimer with headphones connected to prepare playback again. Check your audio output and volume before use. Do not rely on EarTimer as your only alarm for an important wake-up or deadline. FREE WITH OPTIONAL AD REMOVAL The free app can show a non-personalized banner ad on the Timer screen. A one-time Remove Ads in-app purchase removes the banner. Customers who purchased EarTimer before it became free retain their ad-free experience. Purchases can be restored in Settings. Advertising and privacy choices are explained in the app's privacy policy. Requires an iPhone with iOS 26.0 or later. Headphone audio requires a compatible connected output; Live Activity availability depends on the device and system settings.