# Electronics Reference Toolkit — Resistor, LED & Transistor

> Electronics calculation and reference toolkit for students, hobbyists, and engineers. (iPhone/iPad app by Ha Do Thi Thu.)

- Source: https://appshunter.io/ios/app/electronics-reference-toolkit/id6757098692 (this page in markdown: same URL + `.md`)
- Developer: [Ha Do Thi Thu](https://appshunter.io/developer/1707030622)
- Category: Utilities
- Price: Free
- Rating: 4.90/5 from 7 App Store ratings
- Age rating: 4+
- Requires: iOS 16.6 · 7 MB
- Languages: American English
- Released: 2025-12-31
- Data updated: 2026-07-16
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/electronics-reference-toolkit/id6757098692/reviews.md

## What is Electronics Reference Toolkit?

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.

## Key features

- Resistor Calculator (4/5 band)
- Ohm's Law Calculator
- LED Resistor Calculator
- Capacitor Decoder
- Voltage Divider Calculator
- Unit Converter
- Transistor Reference


## Frequently asked questions about Electronics Reference Toolkit

### What tools are included in Electronics Reference Toolkit?

Electronics Reference Toolkit includes a Resistor Calculator, Ohm's Law calculator, LED Resistor Calculator, Capacitor Decoder, Voltage Divider calculator, RC/RL Time Constant calculator, Unit Converter, Battery Life Estimator, and a Transistor Reference.

### Can I use Electronics Reference Toolkit offline?

Yes, Electronics Reference Toolkit is designed for offline use, allowing you to access its tools and reference data without an internet connection.

### What devices does Electronics Reference Toolkit support?

Electronics Reference Toolkit is currently supported on iPhone devices.

### What is the age rating for Electronics Reference Toolkit?

Electronics Reference Toolkit has an age rating of 4+, making it suitable for a wide range of users.

### How often is Electronics Reference Toolkit updated?

The latest version, 1.0.1, was released on January 15, 2026, indicating recent development and support.

### Does Electronics Reference Toolkit have ads?

No, Electronics Reference Toolkit does not contain advertisements, providing an uninterrupted user experience.

### What is the user sentiment for Electronics Reference Toolkit?

Based on the available data, Electronics Reference Toolkit has a high rating of 4.9 stars from 7 ratings, suggesting positive user sentiment.

### Is Electronics Reference Toolkit free to use?

Yes, Electronics Reference Toolkit is available for free, with no cost to download or use its features.

## Version history (last 2 releases)

### 1.0.1 — 2026-01-15

• Bug fixes & performance improvements
• Added 4 new engineering tools: CMS Code Decoder, Resistor Power, Wire Voltage Drop & RLC Analyzer

### 1.0 — 2025-12-31

No release notes.

## Apps similar to Electronics Reference Toolkit

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [WebiPass - OTP & Passwords](https://appshunter.io/ios/app/webipass-otp-and-passwords/id6756489658) | — | Free | Utilities |
| [HomeSpot](https://appshunter.io/ios/app/homespot/id6757016819) | 1.0 (1) | Free | Utilities |
| [Codifier](https://appshunter.io/ios/app/codifier/id6737922796) | 5.0 (2) | Free | Utilities |
| [PaperCrate: AI Scan & Chat](https://appshunter.io/ios/app/papercrate-ai-scan-and-chat/id6755945959) | — | Free | Utilities |
| [Loked - Avoid Photo Swiping](https://appshunter.io/ios/app/loked-avoid-photo-swiping/id6748485088) | — | Free | Utilities |
| [ADD Assistant: System Monitor](https://appshunter.io/ios/app/add-assistant-system-monitor/id6756176028) | 5.0 (17) | Free | Utilities |

## More apps by Ha Do Thi Thu

- [Air Printer App: Print & Scan](https://appshunter.io/ios/app/air-printer-app-print-and-scan/id6466183637)
- [Background Eraser + Changer](https://appshunter.io/ios/app/background-eraser-plus-changer/id6470789140)
- [RepairArt: Photo Enhancer](https://appshunter.io/ios/app/repairart-photo-enhancer/id6471233953)
- [Photo Recovery: Colorizer App](https://appshunter.io/ios/app/photo-recovery-colorizer-app/id6471397184)
- [Ask Commands for Google Home](https://appshunter.io/ios/app/ask-commands-for-google-home/id6475160307)
- [Commands Setup & Tip for Alexa](https://appshunter.io/ios/app/commands-setup-and-tip-for-alexa/id6475714050)

All apps by Ha Do Thi Thu: https://appshunter.io/developer/1707030622

## Related topics

[transistor electronic](https://appshunter.io/ios/topics/transistor-electronic) · [electronics reference toolkit](https://appshunter.io/ios/topics/electronics-reference-toolkit) · [reference tool](https://appshunter.io/ios/topics/reference-tool) · [capacitor](https://appshunter.io/ios/topics/capacitor)

---

*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 2026-07-16.*