RC Circuit vs Operational Amplifiers Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RC Circuit
Calculate RC charging and filter circuits, including time constants and cutoff frequencies. Find component values from these parameters or get voltage at specific times. Save and share data easily.
- Calculate time constant
- Find component values
- Get voltage at time t
- Calculate cutoff frequency
- Save data to CSV
- Upload CSV via AirDrop/iCloud Drive
- Multi-language support
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This app is used to calculate the RC charging and RC filter circuit. It is suitable for hobbyist or electronic engineer. Features * Calculate time constant from R, C * Find component value R,C from time constant * Get voltage at time t in RC charging / discharging * Calculate cutoff frequency by R, C * Find component value R,C from cutoff frequency * Save data to CSV files * Upload CSV via AirDrop / iCloud Drive * Support English, Traditional Chinese, Simplified Chinese, German, French, Italian, Spanish, Portuguese, Japanese
Operational Amplifiers Pro
This app provides interactive calculators and reference information for designing and analyzing op-amp circuits. It offers step-by-step explanations and technical data on popular op-amp series, aiding students and engineers in circuit development and prototyping.
- Interactive op-amp circuit calculators
- Step-by-step explanations and formulas
- Reference data on op-amps and comparators
- Support for 14 languages
- Light and dark mode
- Advanced calculators and circuit guides (Pro)
- Full-text search (Pro)
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Operational Amplifiers Pro is your essential tool for designing and analyzing circuits using op-amps. 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 Pro Version Includes: • Advanced calculators and circuit guides • Full-text topic search • Save favorite circuits for quick access 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 • Popular operational amplifiers description and pinout 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 and Square-Wave Generator • Generator with Adjustable Slope and Duty Cycle 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 Download now and power up your electronics work!
Screenshots
Verdict
The clearest difference is price: RC Circuit at Free against Operational Amplifiers Pro's $4.99. RC Circuit also leads on ratings volume (5 vs 1) and iOS requirement (12.0 vs 16.0). Operational Amplifiers Pro's advantage is in-app purchases (none vs 1) and rating (5.0 vs 4.8). On ads 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
RC Circuit is free to download; Operational Amplifiers Pro costs $4.99 up front. RC Circuit sells 1 one-off in-app purchase. Operational Amplifiers Pro asks for nothing beyond the download.
Operational Amplifiers Pro holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: RC Circuit has 5 ratings behind it against 1, so its average is the more settled of the two.
RC Circuit ships an update every 6 months, Operational Amplifiers Pro every 2 months. The most recent releases landed on September 24, 2026 and September 16, 2026 respectively.
| Parameter | RC Circuit | Operational Amplifiers Pro |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 4.8 (5 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 16 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Siu Yuen Ho | ALG Software Lab |
Customer experience
RC Circuit
Operational Amplifiers Pro
In-app purchases
RC Circuit
- Unlock Pro features$0.99
Operational Amplifiers Pro
No in-app purchases
Questions
Is RC Circuit free?
Is Operational Amplifiers Pro free?
Which has better reviews, RC Circuit or Operational Amplifiers Pro?
Do RC Circuit or Operational Amplifiers Pro have ads?
Which is updated more often, RC Circuit or Operational Amplifiers Pro?
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