Comparison

Electronics Kit vs Operational Amplifiers Guide

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Electronics Kit

This app offers a comprehensive suite of electronics tools and calculators for hobbyists and professionals. It includes features for component value calculation, pinout diagrams, and various electronic resources. Users can access a free version with ads or a PRO version for enhanced functionality and an ad-free experience.

Highlights
  • Component value calculators
  • Extensive pinout diagrams
  • Electronic resource library
  • SMD resistor code lookup
  • Ohm's law calculator
  • RC charging/discharging calculator
  • Frequency converter
Features
Read full description

This app is a powerful collection of electronics tools. It is suitable for hobbyist, electronic engineers or professionals The FREE version may contain ads. You can also buy the PRO version to support the developer, unlock more features and get rid of the ads. Component value function is a tool for find combination of components to making desired corner frequency, equivalent resistance, equivalent capacitance, equivalent inductance, etc. It is useful for designers have different choices of limited components Features ● Calculators : Component value range, SMD resistor code, Resistor in series and parallel, Capacitor in series and parallel, Inductor in series and parallel, Impedance calculator, Ratio calculator, Voltage divider, Ohm's law, RC charging / discharging, LED resistor calculator, RC, RL, LC filter, Wheatstone bridge, Operational amplifier, Adjustable voltage regulator, 555 timer calculator, Power dissipation calculator, Coil inductance, Battery life calculator, Trace width calculator, Frequency converter, RMS converter, Decibel converter, Range converter, Temperature calculator, matrix, complex matrix, simultaneous equations, Routh-Hurwitz, link budget, dipole antenna ● Pinout : audio DIN , DVI, Ethernet, Firewire, Game port, HDMI , Lightning port, Mini-Display port, PS/2 connector, Parallel port, Phone jack connector, RCA connector, Registered jack, S-video, SDCard , Serial port, SIM card, USB, VGA , XLR connector ● Resource : Circuit symbol, SMD resistor package, SMD capacitor package, TTL 7400 series, CMOS 4000 series, SMD marking, ASCII table, logic gate , Resistivity table, Batteries, Ampacity, AWG wire, SWG wire, World plug ● Share CSV via AirDrop ● Share CSV to iCloud Drive

About

Operational Amplifiers Guide

Features
Read full description

Operational Amplifiers Guide is your essential tool for designing and analyzing circuits using op-amps and comparators. Whether you're a student, electronics enthusiast, or experienced engineer, this app helps you create, calculate, and understand a wide variety of op-amp–based circuits with ease. Use it as a practical reference when developing projects, building prototypes, or studying amplifier configurations. The app also includes technical data on popular operational amplifier and comparator series — making it a handy guide for both design and selection. Available in 14 Languages: • English, French, German, Indonesian, Italian, Japanese, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Turkish, Ukrainian, and Vietnamese — study in your native language! Key Features: • Interactive calculators for common op-amp circuits • Step-by-step explanations and formulas • Reference info on op-amps and comparators • Ideal for learning, prototyping, or quick checks • Light and dark mode support The application contains the following guides and calculators: Amplifiers • Non-inverting operational amplifier • Inverting operational amplifier • Inverting amplifier with T-bridge in OS • Differential amplifier • Differential amplifier with T-bridge in OS • Voltage repeater • Inverting voltage repeater • AC voltage amplifier • High Input Impedance AC Voltage Amplifier • AC voltage repeater ActiveFilters • Non-inverting low-pass filter • Inverting low-pass filter • Non-inverting high-pass filter • Inverting high pass filter • Bandpass filter • Gyrator Integrators and differentiators • Voltage integrator • Sum integrator • Integrator with signal amplification • Difference integrator • Double integrator • Voltage differentiator • Sum Differentiator • Differentiator with T-bridge • Differentiator with T-bridge made of capacitors • Difference differentiator Comparators • Comparator • Limiter • Limiter with zener diode at the input • RS trigger Attenuators • Non-inverting attenuator • Inverting attenuator Converters • Voltage-to-current converter with non-inverting input • Voltage to current converter with inverting input • Voltage to current converter with differential input Adders and substactors • Inverting adder • Addition-subtraction circuit • Non-inverting adder Logarithmic and exponential amplifiers • Diode-based logarithmic amplifier • Transistor-based logarithmic amplifier • Diode exponential amplifier • Exponential transistor amplifier Sine Wave generators: • Op-Amp Oscillators • Oscillator with Diode in the Feedback Path • Twin-T Network Signal Generator Square-wave pulse generators • Op-Amp Square-Wave Generator • Adjustable Square-Wave Generator • Enhanced Square-Wave Generator • Duty-Cycle Adjustment Triangle-wave signal generators • Nonlinear Triangle-Wave Generator • Variable-Symmetry Sawtooth Generator • Linear Triangle-Wave Generator • Adjustable Linear Triangle-Wave Generator • Variable-Symmetry Ramp Generator Popular operational amplifiers: description and pinout Popular comparators: description and pinout Download now and power up your electronics work!

Screenshots

Electronics Kit4 screens
Operational Amplifiers Guide4 screens

Verdict

The call

The clearest difference is in-app purchases: Operational Amplifiers Guide at none against Electronics Kit's 5. Electronics Kit's advantage is ads (none vs shown) and iOS requirement (9.0 vs 16.0). On price, update cadence and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Electronics Kit sells 5 one-off in-app purchases. Operational Amplifiers Guide asks for nothing beyond the download.

UpkeepUpdate frequency

Electronics Kit ships an update every 6 weeks, Operational Amplifiers Guide every 2 months. The most recent releases landed on September 24, 2026 and September 19, 2026 respectively.

Scorecard3 real differences · 7 level
Electronics Kit versus Operational Amplifiers Guide: the parameters behind the verdict, then further details
ParameterElectronics KitOperational Amplifiers Guide
PriceFreeFree
Rating4.8 (65 ratings) — better—
Positive reviews91.4% of reviews—
Number of ratings65 — better—
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.0 — better16.0
Further details — not scored
Size53 MB17 MB
Age rating4+4+
DeveloperSiu Yuen HoALG Software Lab

In-app purchases

5 purchases

Electronics Kit

One-time5
  • Unlock no. of components limit$0.99
  • Unlock Pro feature$1.99
  • 'Show steps' in nodal analysis$2.99
Show 2 more
  • Unlock controlled sources$2.99
  • 'Show steps' in equivalent cir$3.99
None

Operational Amplifiers Guide

No in-app purchases

Questions

Is Electronics Kit free?
Electronics Kit is free to download, with in-app purchases available.
Is Operational Amplifiers Guide free?
Operational Amplifiers Guide is free to download, with no in-app purchases.
Do Electronics Kit or Operational Amplifiers Guide have ads?
Operational Amplifiers Guide shows ads; Electronics Kit does not.
Which is updated more often, Electronics Kit or Operational Amplifiers Guide?
Electronics Kit ships an update every 6 weeks, and Operational Amplifiers Guide every 2 months. Most recently, Electronics Kit was updated on September 24, 2026 and Operational Amplifiers Guide on September 19, 2026.

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