# OpAmplifiers vs Circuit Simulator

The clearest difference is in-app purchases: OpAmplifiers at none against Circuit Simulator's 8. OpAmplifiers also leads on rating (5.0 vs 4.7) and iOS requirement (6.0 vs 15.3). Circuit Simulator's advantage is ratings volume (87 vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Circuit Simulator sells 8 in-app purchases, starting at $0.99 per month. OpAmplifiers asks for nothing beyond the download.

OpAmplifiers holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Circuit Simulator has 87 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on September 23, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | OpAmplifiers | Circuit Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/opamplifiers/id700960348/reviews)** | [4.7 (87 ratings)](https://appshunter.io/ios/app/circuit-simulator-voltsim/id6736870364/reviews) |
| Number of ratings | 1 | **87** |
| Positive reviews | — | 76.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 103 MB |
| Requires iOS | **6.0** | 15.3 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kyrill Cousson](https://appshunter.io/developer/478650872) | [Sindhu Gopi](https://appshunter.io/developer/1773585161) |

## What reviewers say

### OpAmplifiers

[App page](https://appshunter.io/ios/app/opamplifiers/id700960348)

This app aids electronics students by providing information on operational amplifier applications, including schematics, formulas, and component calculations. It offers a simple interface to revise key concepts and check amplifier pinouts.

**Highlights:** Operational amplifier application revision, Schematics and input value display, Formula lookup, Component value calculation, Amplifier pinout checking, Supports multiple op-amp circuit types

**Features:** macOS Compatibility

**In-app purchases:** none


### Circuit Simulator

[App page](https://appshunter.io/ios/app/circuit-simulator-voltsim/id6736870364)

Design and simulate electronic and digital circuits in real-time. Visualize voltage and current flow, and analyze circuit behavior with tools like oscilloscopes and multimeters. Offers a user-friendly experience for circuit design and digital electronic analysis.

**Highlights:** Real-time electronic circuit simulation, Digital circuit simulation, Voltage and current analysis, Multichannel oscilloscope, Multimeter tools, Circuit design and tuning

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extensions Subscription | $0.99 | per month |
| Sensors Extension | $0.99 | one-time |
| Custom Chips Extension | $1.99 | one-time |
| Instruments extension | $2.99 | one-time |
| Analog Extension | $3.99 | one-time |
| Misc Extension | $3.99 | one-time |
| Digital Extension | $3.99 | one-time |
| Extension Pack | $12.99 | one-time |


## Frequently asked questions

### Is OpAmplifiers free?

OpAmplifiers is free to download, with no in-app purchases.

### Is Circuit Simulator free?

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

### Which has better reviews, OpAmplifiers or Circuit Simulator?

OpAmplifiers is rated higher. OpAmplifiers averages 5.0 out of 5 from 1 ratings, while Circuit Simulator averages 4.7 from 87 ratings.

### Do OpAmplifiers or Circuit Simulator have ads?

Neither OpAmplifiers nor Circuit Simulator shows ads.

### Which is updated more often, OpAmplifiers or Circuit Simulator?

OpAmplifiers ships an update every 6 weeks, and Circuit Simulator every 6 weeks. Most recently, OpAmplifiers was updated on September 23, 2026 and Circuit Simulator on October 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.*