--- title: "Electronics Reference Toolkit - Reviews, Revenue and Downloads in United States | Apple App Store" description: "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" --- # Electronics Reference Toolkit — United States > Resistor, LED & Transistor ![Electronics Reference Toolkit App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/98/f2/26/98f226e1-6f2c-4fa3-65f5-30206a156830/AppIcon-0-0-1x_U007ephone-0-1-85-220.jpeg/434x0w.png) **Developer:** [Ha Do Thi Thu](https://apptail.io/developer/ha-do-thi-thu-POq) **Category:** Utilities **Rating:** 4.8/5 (12 ratings) **Price:** Free **Bundle ID:** com.ha.circuit **Store:** Apple App Store **Country:** United States **Version:** 1.0.1 (released 2026-01-15) **Original Release:** 2025-12-31 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6757098692) **AppTail Page:** [https://apptail.io/app/electronics-reference-toolkit-JKby/united-states](https://apptail.io/app/electronics-reference-toolkit-JKby/united-states) ## Electronics Reference Toolkit Description 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. ## Electronics Reference Toolkit Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/dc/71/ce/dc71ce29-bf04-95f5-581f-ecb93005a24a/IMG_0225.jpg/1242x2688.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/12/82/18/12821870-3f65-7163-d541-ee939a949b3c/IMG_0215.jpg/1242x2688.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/3e/f9/b1/3ef9b19d-527b-fd45-6c37-3fc4c34f0c68/IMG_0219.jpg/1242x2688.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/0e/6c/c6/0e6cc6a3-22b0-4c23-b2a8-01f0c98c5cd3/IMG_0221.jpg/1242x2688.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/6f/c3/48/6fc348fc-1473-9b52-20f5-a62de1c3e405/IMG_0220.jpg/1242x2688.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/c7/db/61/c7db618c-9450-360e-ccfe-07d91cf98160/IMG_0223.jpg/1242x2688.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/60/50/b8/6050b8e3-59d1-0a6f-2539-9231fb6b162b/IMG_0217.jpg/1242x2688.png) ## Electronics Reference Toolkit Rating Breakdown in United States - 5 stars: 10 (83%) - 4 stars: 2 (17%) - 3 stars: 0 (0%) - 2 stars: 0 (0%) - 1 stars: 0 (0%) ## Electronics Reference Toolkit Available In - [United States](https://apptail.io/app/electronics-reference-toolkit-JKby/united-states) - [Angola](https://apptail.io/app/electronics-reference-toolkit-JKby/angola) - [Belgium](https://apptail.io/app/electronics-reference-toolkit-JKby/belgium) - [Bahrain](https://apptail.io/app/electronics-reference-toolkit-JKby/bahrain) - [Bermuda](https://apptail.io/app/electronics-reference-toolkit-JKby/bermuda) - [Brunei](https://apptail.io/app/electronics-reference-toolkit-JKby/brunei) - [Brazil](https://apptail.io/app/electronics-reference-toolkit-JKby/brazil) - [Belarus](https://apptail.io/app/electronics-reference-toolkit-JKby/belarus) - [Belize](https://apptail.io/app/electronics-reference-toolkit-JKby/belize) - [Canada](https://apptail.io/app/electronics-reference-toolkit-JKby/canada) - [Cyprus](https://apptail.io/app/electronics-reference-toolkit-JKby/cyprus) - [Estonia](https://apptail.io/app/electronics-reference-toolkit-JKby/estonia) - [France](https://apptail.io/app/electronics-reference-toolkit-JKby/france) - [Ghana](https://apptail.io/app/electronics-reference-toolkit-JKby/ghana) - [Croatia](https://apptail.io/app/electronics-reference-toolkit-JKby/croatia) - [Iceland](https://apptail.io/app/electronics-reference-toolkit-JKby/iceland) - 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