OpAmplifiers vs Electronics Tools & Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OpAmplifiers
This app aids electronics students by providing information on operational amplifier applications, including schematics, formulas, and component calculations. It offers a simple interface to revise key concepts and check amplifier pinouts.
- Operational amplifier application revision
- Schematics and input value display
- Formula lookup
- Component value calculation
- Amplifier pinout checking
- Supports multiple op-amp circuit types
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The ideal app for electronics studies ! OpAmplifiers allows you to easily revise what you should know about the main applications of Operational Amplifiers, but that's not it ! You can also use OpAmplifiers to calculate the values of your components and quickly check out the pinning of your amplifier, all in a simple and smooth interface. For each application, OpAmplifiers allows you to : - See schematics, and input values. - See the formula of the application. - Check the pinning of your amplifier. The following Operational Amplifier applications are available : - Voltage Follower - Comparator - Inverting Amplifier - Non Inverting Amplifier - Summing Amplifier - Differential Amplifier - Inverting Integrator - Inverting Differentiator
Electronics Tools & Calculator
This app serves as a pocket-sized electronics lab, offering a comprehensive reference for components and circuits. It simplifies complex calculations for filters, inductors, and various circuit configurations, aiding both engineers and hobbyists in their design processes.
- 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
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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.
Screenshots
Verdict
The clearest difference is rating: OpAmplifiers at 5.0 against Electronics Tools & Calculator's 4.0. OpAmplifiers also leads on ads (none vs shown) and iOS requirement (6.0 vs 15.0). Electronics Tools & Calculator's advantage is ratings volume (16 vs 1). On price, update cadence, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OpAmplifiers holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Electronics Tools & Calculator has 16 ratings behind it against 1, so its average is the more settled of the two.
Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on September 23, 2026 and September 27, 2026 respectively.
| Parameter | OpAmplifiers | Electronics Tools & Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.0 (16 ratings) |
| Positive reviews | — | 16.7% of reviews |
| Number of ratings | 1 | 16 — better |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 6.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 3 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | Kyrill Cousson | Anas Abubakar |
Customer experience
OpAmplifiers
Electronics Tools & Calculator
In-app purchases
OpAmplifiers
No in-app purchases
Electronics Tools & Calculator
No in-app purchases
Questions
Is OpAmplifiers free?
Is Electronics Tools & Calculator free?
Which has better reviews, OpAmplifiers or Electronics Tools & Calculator?
Do OpAmplifiers or Electronics Tools & Calculator have ads?
Which is updated more often, OpAmplifiers or Electronics Tools & Calculator?
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