Comparison

Circuit Resistance Creator 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

Circuit Resistance Creator

Calculate equivalent resistance for any resistor circuit. This tool is designed for students, technicians, and engineers, offering high accuracy for voltage, current, and resistance. It's a great way to check homework and perform engineering calculations.

Highlights
  • Equivalent resistance calculation
  • Supports any resistor circuit
  • High accuracy displays (6 decimal places)
  • Apply custom circuit voltages
  • Designed for students and engineers
  • Homework checking tool
Features
Read full description

Features: - Designed for students, technicians and engineers. - Find Equivalent Resistance for any resistor circuit. - Great Engineering tool. - Great for checking homework. - Super accurate with 6 decimal voltage, current and ohms displays. - Apply any circuit voltage from 1 to 1000 volts, with 3 decimal accuracy. - FREE and NO ADVERTISEMENTS.

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

Circuit Resistance Creator4 screens
Operational Amplifiers Guide4 screens

Verdict

The call

The clearest difference is ads: Circuit Resistance Creator at none against Operational Amplifiers Guide's shown. Circuit Resistance Creator also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (14.0 vs 16.0). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Circuit Resistance Creator ships an update every 3 weeks, Operational Amplifiers Guide every 2 months. The most recent releases landed on September 26, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 7 level
Circuit Resistance Creator versus Operational Amplifiers Guide: the parameters behind the verdict, then further details
ParameterCircuit Resistance CreatorOperational Amplifiers Guide
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better16.0
Further details — not scored
Size15 MB17 MB
Age rating4+4+
DeveloperDavid WhiteALG Software Lab

In-app purchases

None

Circuit Resistance Creator

No in-app purchases

None

Operational Amplifiers Guide

No in-app purchases

Questions

Is Circuit Resistance Creator free?
Circuit Resistance Creator is free to download, with no in-app purchases.
Is Operational Amplifiers Guide free?
Operational Amplifiers Guide is free to download, with no in-app purchases.
Do Circuit Resistance Creator or Operational Amplifiers Guide have ads?
Operational Amplifiers Guide shows ads; Circuit Resistance Creator does not.
Which is updated more often, Circuit Resistance Creator or Operational Amplifiers Guide?
Circuit Resistance Creator ships an update every 3 weeks, and Operational Amplifiers Guide every 2 months. Most recently, Circuit Resistance Creator was updated on September 26, 2026 and Operational Amplifiers Guide on October 1, 2026.

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