# RC Circuit vs Operational Amplifiers Pro

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.

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.

## The numbers

| Metric | RC Circuit | Operational Amplifiers Pro |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [4.8 (5 ratings)](https://appshunter.io/ios/app/rc-circuit/id824460716/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/operational-amplifiers-pro/id6467253953/reviews)** |
| Number of ratings | **5** | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | **Free** | Paid |
| Size | 16 MB | 14 MB |
| Requires iOS | **12.0** | 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

[App page](https://appshunter.io/ios/app/rc-circuit/id824460716)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro features | $0.99 | one-time |


### 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 free?

RC Circuit is free to download, with in-app purchases available.

### Is Operational Amplifiers Pro free?

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

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

Operational Amplifiers Pro is rated higher. RC Circuit averages 4.8 out of 5 from 5 ratings, while Operational Amplifiers Pro averages 5.0 from 1 ratings.

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

Neither RC Circuit nor Operational Amplifiers Pro shows ads.

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

RC Circuit ships an update every 6 months, and Operational Amplifiers Pro every 2 months. Most recently, RC Circuit was updated on September 24, 2026 and Operational Amplifiers Pro on September 16, 2026.

---

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