# RC Circuit Pro vs Operational Amplifiers Pro

The clearest difference is rating: Operational Amplifiers Pro at 5.0 against RC Circuit Pro's 1.0. RC Circuit Pro's advantage is price ($0.99 vs $4.99) and iOS requirement (9.0 vs 16.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

RC Circuit Pro costs $0.99 and Operational Amplifiers Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Operational Amplifiers Pro holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

RC Circuit Pro ships an update every 4 months, Operational Amplifiers Pro every 2 months. The most recent releases landed on June 4, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | RC Circuit Pro | Operational Amplifiers Pro |
| --- | --- | --- |
| Price | **$0.99** | $4.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/rc-circuit-pro/id824145786/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/operational-amplifiers-pro/id6467253953/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 17 MB | 14 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### RC Circuit Pro

[App page](https://appshunter.io/ios/app/rc-circuit-pro/id824145786)

Calculate RC charging and filter circuits with ease. This tool helps hobbyists and engineers determine time constants, component values, and cutoff frequencies. Save and export your circuit data for further analysis.

**Highlights:** Calculate time constant, Find component values (R, C), Determine voltage at time t, Calculate cutoff frequency, Save data to CSV, Export data via AirDrop/iCloud Drive

**In-app purchases:** none


### Operational Amplifiers Pro

[App page](https://appshunter.io/ios/app/operational-amplifiers-pro/id6467253953)

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.

**Highlights:** 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)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RC Circuit Pro free?

RC Circuit Pro costs $0.99, with no in-app purchases.

### Is Operational Amplifiers Pro free?

Operational Amplifiers Pro costs $4.99, with no in-app purchases.

### Which has better reviews, RC Circuit Pro or Operational Amplifiers Pro?

Operational Amplifiers Pro is rated higher. RC Circuit Pro averages 1.0 out of 5 from 1 ratings, while Operational Amplifiers Pro averages 5.0 from 1 ratings.

### Do RC Circuit Pro or Operational Amplifiers Pro have ads?

Neither RC Circuit Pro nor Operational Amplifiers Pro shows ads.

### Which is updated more often, RC Circuit Pro or Operational Amplifiers Pro?

RC Circuit Pro ships an update every 4 months, and Operational Amplifiers Pro every 2 months. Most recently, RC Circuit Pro was updated on June 4, 2026 and Operational Amplifiers Pro on September 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*