# Electronics Toolkit! — Dozens of tools in one app

> Electronics toolkit with calculators, tables, and converters for electronics professionals and students. (iPhone/iPad app by Electronial.)

- Source: https://appshunter.io/ios/app/electronics-toolkit/id1350248261 (this page in markdown: same URL + `.md`)
- Developer: [Electronial](https://appshunter.io/developer/1350247180)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Rating: 4.30/5 from 556 App Store ratings · 89 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 23 MB
- Languages: American English, Dutch, French (France), German (Germany), Indonesian, Brazilian Portuguese, Russian, Chinese (Simplified, China), Latin American Spanish
- Released: 2018-03-02
- Data updated: 2026-08-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/electronics-toolkit/id1350248261/reviews.md

## What is Electronics Toolkit!?

Electronics Toolkit is a helpful app with dozens of tools, calculators and references made for electronic engineers, students and hobbyists.

Features:

Calculators:
• Resistor color codes -  calculate the resistance of resistors by selecting the colors of the bands

• SMD resistor codes - calculate the resistance of SMD resistors by entering the number

• LED resistor calculator - calculate the needed resistance to connect en LED to a power source

• Parallel resistors - calculate the resistance of resistors in parallel

• Voltage divider - calculate the output voltage of a voltage divider

• Series resistors - calculate the resistance of resistors in series

• Ohm's law - calculate the voltage, current of resistance by entering the other two

• Capacitance calculator - calculate the capacitance, voltage or charge by entering the other two

• Battery discharge - calculate the time it takes to discharge a battery

• Inductor color codes  - calculate the inductance of inductors by selecting the colors of the bands

• Parallel capacitors - calculate the capacitance of capacitors in parallel

• Series capacitors - calculate the capacitance of capacitors in series

• Unit converter - unit converter for length, temperature, area, volume, weight, time, angle, power and base

• Op-amp calculator - calculate the output voltage of non-inverting, inverting, summing and differential opamps

• Wheatstone bridge - calculate the resistance of one resistor in a balanced bridge or calculate the output voltage

• Inductor codes - calculate the inductance of  inductors by entering the number

• Capacitor codes - calculate the capacitance of capacitors by entering the number

• DAC and ADC calculator - calculate the output of digital-analog and analog-digital converters

• Wavelength frequency calculator  - calculate the frequency or wavelength of a wave

• SI prefixes - convert numbers with SI prefixes

• Capacitor energy - calculate the energy in a capacitor

• Slew rate calculator - calculate the slew rate

• Star delta transformation - calculate the resistors in a star delta transformation

• Zener calculator - calculate the resistance of the resistor and voltage of the zener

• Air core inductor calculator - calculate the inductance and wire length of an air-core inductor

• 555 timer calculator - calculate the frequency, period, duty cycle, high time and low time of a popular 555 timer circuit

• Plate capacitor calculator - calculate the capacity of a plate capacitor

• Resistance to color code calculator - calculate the colors on the resistor by entering the resistance

• LM317 - calculate the output voltage of an LM317

• Low pass filters

• Wire resistance - calculate the resistance of an electrical wire

• RMS voltage

• Decibel calculator

•Reactance

Tables:
• Logic gates - truth table of the 7 logic gates with interactive buttons

• 7-segment display - an interactive display that you can change by clicking on one of the segments or by clicking on a button to show a hexadecimal character

• ASCII - decimal, hexadecimal, binary, octal and char ASCII table

• Resistivity - table with the resistivity of common metals at 293K

• Arduino pinout

• Pinout diagrams of 4000 and 7400 series ICs

## Key features

- Resistor color code calculators
- LED resistor calculator
- Ohm's law calculator
- Unit converter
- Logic gates truth tables
- 7-segment display simulator

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro version | $2.99 | one-time |


## What do users think of Electronics Toolkit!?

Overall sentiment: mixed

**Pros**

- 📚 Comprehensive electronics reference material
- 👍 Useful for beginners and students
- 🎯 Good basic calculators for resistance and capacitance
- 📌 Helpful pinout diagrams for Arduino and Raspberry Pi
- ⚡ Valuable tool for hobbyists
- 🎨 Clean and organized interface structure

**Cons**

- 🎨 Poor color scheme with readability issues
- ⚪ White text on white background
- 🔒 Excessive paywall blocking most features
- 📢 Intrusive and excessive advertising
- 🐛 App crashes and freezes frequently
- ⌨️ Keyboard input not functioning properly
- 🔄 Pro version purchase not recognized
- 📊 Limited IC database with few options
- 🌐 Poor translation quality (especially Russian)
- ❌ Static reference only, minimal functionality
- 💰 Requires separate purchases per device

**Commonly reported bugs**

- App crashes when entering values in calculation fields
- Keyboard doesn't appear or dismiss properly
- Pro version purchase not activating features
- App reverts to free version after purchase
- Calculation functions non-functional
- Input fields partially visible or cut off
- App won't load on some devices
- Navigation issues (no back button to main menu)
- Unstable performance and frequent crashes
- Blurry or distorted text in some sections

**Most requested features**

- Dark mode option
- Working calculator functionality with proper input fields
- Multi-language support (Turkish, Spanish, Hindi, etc.)
- Expanded IC pinout database
- More detailed background information and tutorials
- Keyboard dismiss functionality
- Better translation quality
- Cross-device license sharing

## Recent user reviews (10 of 89)

All indexed reviews: https://appshunter.io/ios/app/electronics-toolkit/id1350248261/reviews.md

### 2/5 — Its alright for beginners but nothing special

*2026-06-15, version 1.1.7*

Almost every thing is pro and am not paying $2 for pro but it's ok

### 5/5 — DIY

*2026-05-10, version 1.1.7*

This is a fantastic app for those wanting to start off in electronics before learning the formulas. Thank you

### 1/5 — Has problems

*2026-05-01, version 1.1.7*

Fields are frequently cut off from view making entering or reading values impossible. Paid and free both have this defect.

### 3/5 — Dark Mode

*2026-02-10, version 1.1.7*

How is there no way to switch to dark mode, the fonts and text are almost impossible to read.

### 5/5 — Simplemente épica

*2025-09-10, version 1.1.7*

(Sin comentarios)

### 3/5 — Сырое приложение

*2025-04-08*

Многие кнопки не работают. Скудное количество datasheet без возможности загрузки из сети интернет. Плохой перевод на русский язык, будто гугл переводчиком из 2000 года переводили. Своих денег не стоит

### 2/5 — Save Your Money

*2025-04-07, version 1.1.7*

Poor color scheme makes it hard to read.  Doesn’t “DO” anything other than static reference material.  Much better options out there for a couple dollars more.

### 1/5 — Background color

*2025-02-15, version 1.1.7*

I send email about background color.  Please check the mail. If the problem fixes i will change my comment.

### 4/5 — Font color

*2024-12-08, version 1.1.7*

I would give this 5 stars but don’t use a white font on an almost white background!

### 3/5 — Текст

*2024-11-20, version 1.1.7*

Нужно поменять или цвет фона или надписей страх как неудобно

## Frequently asked questions about Electronics Toolkit!

### What does the Electronics Toolkit! app do?

The Electronics Toolkit! app offers a wide array of tools and calculators specifically designed for individuals working with electronics. It includes calculators for various components like resistors, capacitors, and LEDs, as well as fundamental laws like Ohm's law, and useful reference tables and unit converters.

### What are the key features of Electronics Toolkit!?

Key features include a comprehensive set of calculators for resistor color codes, SMD resistors, LED resistors, parallel and series resistors, Ohm's law, capacitance, and voltage dividers. It also offers a unit converter, logic gate truth tables, and a 7-segment display simulator.

### Is Electronics Toolkit! free to use?

The app is available for free download and use, but it does include in-app purchases. This means that while the core functionality is accessible without cost, certain features or enhancements may require a purchase.

### Who is the target audience for this app?

This application is intended for electronics engineers, students studying electrical engineering or related fields, and hobbyists who engage in electronic projects. It serves as a convenient digital resource for their work and learning.

### What kind of calculations can I perform with this app?

You can perform a vast range of calculations, including determining resistance from color codes, calculating LED current limiting resistors, solving Ohm's law problems, calculating voltage dividers, and converting between various units of measurement. It also supports calculations for capacitors, inductors, and basic logic gates.

## Version history (last 5 releases)

### 1.1.7 — 2022-12-14

Bug fixes

### 1.1.6 — 2019-12-10

bug fixes

### 1.1.5 — 2019-07-20

bug fixes

### 1.1.4 — 2019-07-18

bug fixes

### 1.1.3 — 2019-07-18

bug fixes

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## More apps by Electronial

- [Electronics Toolkit Pro](https://appshunter.io/ios/app/electronics-toolkit-pro/id1350353308)
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All apps by Electronial: https://appshunter.io/developer/1350247180

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*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 2026-08-24.*