Electronics Reference Toolkit vs ChargeTune

ElecKit is a lightweight electronics toolkit built for fast lookups and quick calculations—perfect for students, hobbyists, and engineers. Tools included - Resistor Calculator (4/5 band) + tolerance & range - Ohm’s Law (V/I/R/P) - LED Resistor Calculator (Vs, Vf, If) - Capacitor Decoder (3-digit & EIA codes) - Voltage Divider (2 or 3 resistors) - RC/RL Time Constant with charging curve & key points (1τ…5τ) - Unit Converter (Ω, F, H, Hz + prefixes) - Battery Life Estimator (battery type, load current, duty cycle) - Transistor Reference (NPN, PNP, MOSFET) with fast search & filters Notes * Designed for speed, clean UI, and offline use. * Reference values may vary by manufacturer—always confirm with the datasheet.

Give your charging routine a sound of its own with ChargeTune: Charging Sounds. Choose from 48 built-in sounds or create custom audio for connecting your charger, unplugging, and reaching selected battery levels. MAKE EVERY CHARGE YOURS Pick sounds for charging events, a full or low battery, and battery levels at 20%, 50%, and 80%. Preview sounds before choosing, save your favorites, or add variety with random playback. CREATE YOUR OWN SOUNDS Record your voice, import audio from Files, extract audio from a video, or turn text into speech. Create a charging sound that feels personal, playful, or unexpected. EDIT AND ADD EFFECTS Trim your audio, adjust speed, pitch, and volume, and add fades. Try Funny, Deep, Robot, and Ghost effects, then preview and save your creation. SET UP WITH APPLE SHORTCUTS Follow the in-app guide to create automations in Apple Shortcuts. Once configured, your automations use your latest sound selections, so you can change sounds without rebuilding the setup. ALL FEATURES, FREE Enjoy all 48 built-in sounds, unlimited custom sounds, voice effects, favorites, and random playback without subscriptions or in-app purchases. Available for iPhone and iPad, with light and dark appearances and English and Vietnamese support. Charging and battery sounds require personal automations configured by you in Apple Shortcuts. Selecting a sound in the app saves your preference; it does not automatically create an automation or replace the system charging sound.