# Electronics Tools & Calculator — Circuits, Filters & Components

> Electronics reference and calculation tool for engineers and hobbyists. (iPhone/iPad app by Anas Abubakar.)

- Source: https://appshunter.io/ios/app/electronics-tools-and-calculator/id1581885136 (this page in markdown: same URL + `.md`)
- Developer: [Anas Abubakar](https://appshunter.io/developer/1581534101)
- Category: Education, Reference
- Price: Free
- Rating: 4.00/5 from 16 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 63 MB
- Languages: Russian, German (Germany), Italian, Japanese, French (France), Chinese (Simplified, China), American English, European Portuguese, European Spanish
- Released: 2021-08-21
- Data updated: 2026-09-09
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/electronics-tools-and-calculator/id1581885136/reviews.md

## What is Electronics Tools & Calculator?

Calculate, simulate, and understand electronic circuits with more than 60 calculators, interactive tools, and illustrated engineering references.

Electronics Tools & Calculator is an all-in-one toolkit for students, engineers, technicians, makers, and electronics enthusiasts. Use it to study circuit theory, select components, check designs, or troubleshoot projects with practical calculators and clear circuit visuals.

MORE THAN 60 ELECTRONICS CALCULATORS

Solve problems across a wide range of topics:

• Ohm’s law, voltage, current, resistance, and power
• Series and parallel resistors and capacitors
• Four-band, five-band, and SMD resistor codes
• Voltage and current dividers
• DC power and ripple voltage
• RC, RL, LC, and RLC circuits
• LED resistor and parallel LED calculations
• Capacitor and inductor charging
• Star-to-delta and delta-to-star conversions

ACTIVE AND PASSIVE FILTER DESIGN

Design and explore:

• RC, RL, and LC filters
• Butterworth and Chebyshev filters
• Active and passive filters
• Sallen-Key active filters
• Band-pass and band-reject filters
• Twin-T notch filters

Selected advanced calculators include response graphs, helping you visualize how component values affect circuit behavior.

AMPLIFIERS AND SEMICONDUCTORS

Work with practical tools for:

• 555 timer astable and monostable circuits
• BJT analysis, biasing, Q-point, and switching
• MOSFET switching
• Inverting, non-inverting, and difference amplifiers
• Class A, Class B, and Class AB amplifiers
• Differential amplifiers and current mirrors
• LM386 audio amplifier circuits

POWER, RF, AND DESIGN TOOLS

Explore calculations for:

• Linear regulators and heat dissipation
• Buck and boost converters
• Rectifiers and Zener regulators
• Clippers, clampers, and voltage multipliers
• PCB trace width
• Air-core and multilayer inductors
• Transformers
• Coaxial cables and waveguides
• Antenna length and skin depth
• dBm, watts, and decibel conversions
• Servo and stepper motors

DIGITAL ELECTRONICS

Study essential digital circuits with clear diagrams and truth tables:

• Logic gates
• Flip-flops and counters
• Multiplexers and demultiplexers
• Encoders and decoders
• Shift registers
• Common digital integrated circuits

INTERACTIVE CIRCUIT TOOLS

Explore circuit behavior through interactive simulations and strong visual explanations. Adjust values, examine circuit configurations, and connect formulas with practical electronic designs.

ILLUSTRATED ELECTRONICS REFERENCES

Access more than 30 guides covering resistors, capacitors, inductors, transformers, diodes, BJTs, MOSFETs, IGBTs, UJTs, SCRs, DIACs, TRIACs, operational amplifiers, regulators, 555 timers, sensors, digital logic, Arduino boards, and ATmega microcontrollers.

The guides combine explanations, equations, circuit diagrams, pinouts, truth tables, and practical notes to connect theory with real-world applications.

DESIGNED FOR FASTER WORK

• Search calculators by name
• Save frequently used tools to Favorites
• View response graphs in selected calculators
• Export results from selected tools as PDF documents
• Automatically switch between light and dark appearance
• Use an interface designed for phones and larger screens
• Choose from 15 supported languages
• Access additional features through optional Pro tools

Whether you are learning electronics, designing a filter, analyzing an amplifier, or checking values at the workbench, Electronics Tools & Calculator keeps useful tools and references close at hand.

Important: This app is intended for education and design assistance. Always verify calculations, component ratings, circuit requirements, and safety considerations before building or operating electronic equipment.

## Key features

- Electronic component reference
- Electronic circuit reference
- Filter design calculators
- Inductor winding calculators
- Transformer winding calculators
- Resistor and capacitor calculations
- Ohm's law and power calculations

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/electronics-tools-and-calculator/id1581885136/reviews.md

### 1/5 — bad

*2026-06-03*

as usual, it doesnt include the most essential thing about transformers: the EMF equation. [V=√2πfNAB(max)] which is an extremey ignorant thing to do. education doesnt come from blindly repeating phrases! according to the "equations" you have in your "transformer calculator": i can use 1 turn on the primary side of a mains transformer and use 10 turns on the seconday to get 10 times as much voltage!  but when you say this to these people, they blindly repeat "noo! low reactance makes short!" without knowing what are they talking about! like sheep!!! they cant explain why you cant use 1 turn on the primary! and when someone wants to know why, they will have a hard time searching for a reasonable reason. 

the review is getting too long, so if YOU want to know the reason why you cant use 1 turn (and why MOTs saturate), copy the equation and ask google why you cant use 1 turn, then tell him to explain using this equation, then explain the equation itself. and dont forget to tell him what type of core you are using (iron or ferrite (because this equation works for high frequencies, too!))

V = √2×π×f×N×A×B

### 1/5 — 不能升级

*2026-03-18*

已经购买过了，还不能升级，没啥用处了

### 1/5 — 全是广告，下架得了

*2025-02-22*

一打开全是广告，还关不掉，垃圾垃圾

### 1/5 — Too much ads

*2025-01-26*

Too much ads you don’t have a chance to do anything on the app

### 1/5 — 全是广告，根本看不了

*2024-11-25*

1

### 4/5 — 非常实用

*2024-01-31*

在电路基础中非常实用

## Frequently asked questions about Electronics Tools & Calculator

### What types of electronic components are included in Electronics docs & calcs?

Electronics docs & calcs includes a wide range of components such as resistors, capacitors, inductors, diodes, transistors (BJT and MOSFET), 555 timers, operational amplifiers, Arduino boards, and various integrated circuits like multiplexers, decoders, and flip-flops.

### What circuit calculation features does Electronics docs & calcs offer?

The app provides calculators for NE555 timer configurations (astable and monostable), BJT analysis, inductor and transformer winding, various passive and active filter designs (Butterworth, Sallen-Key, etc.), resistor and capacitor series/parallel combinations, LRC circuits, voltage and current dividers, and Ohm's law.

### Is Electronics docs & calcs suitable for beginners?

Yes, the app is designed for both electronics engineers and hobbyists, suggesting it can be beneficial for beginners looking to learn and design circuits. Its comprehensive reference and calculation sections can aid in understanding electronic principles.

### How often is Electronics docs & calcs updated?

The app was last updated on June 30, 2025, indicating recent development. It has had two versions released, suggesting a commitment to ongoing improvement and feature additions.

### What devices support Electronics docs & calcs?

Electronics docs & calcs is supported on iPhones, iPads, and iPods, making it accessible to a wide range of Apple mobile device users.

### Does Electronics docs & calcs have ads?

No, Electronics docs & calcs does not contain advertisements. This allows for an uninterrupted user experience while referencing components or performing calculations.

### What is the user rating for Electronics docs & calcs?

Electronics docs & calcs has a strong user rating of 4.4 stars, based on 13 ratings. This indicates a generally positive reception from its users.

### Can Electronics docs & calcs help with filter design?

Yes, Electronics docs & calcs features calculators specifically for designing various types of filters, including Butterworth, Bessel, Chebychev passive filters, and Sallen-Key active filters. It can calculate component values for these designs.

## Version history (last 5 releases)

### 7 — 2026-09-06

This update adds powerful new electronics tools, simulations, and learning resources:
• Buck and Boost converter calculator  
• Chebyshev filter calculator  
• Servo and stepper motor calculators  
• Parallel LED calculator  
• Digital circuit simulations  
• Sawtooth wave simulation  
• MOSFET switch simulation  
• H-bridge simulator  
• New TRIAC, DIAC, and thermistor content  
• Improved electronic component documentation  

Explore circuits, calculate component values, and understand electronics more easily—all in one app.

### 6 — 2026-08-17

Few bugs fixed, improved the UI

### 5 — 2026-08-04

improved the user interface, added more calculators and simulators

### 4 — 2026-07-28

improved the user interface, added more calculators and simulators

### 3 — 2026-07-22

improved the user interface, added more calculators and simulators

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## More apps by Anas Abubakar

- [Electronics docs & calculators](https://appshunter.io/ios/app/electronics-docs-and-calculators/id1581668963)
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All apps by Anas Abubakar: https://appshunter.io/developer/1581534101

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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 2026-09-09.*