# OpAmplifiers vs Singular

The clearest difference is rating: OpAmplifiers at 2.0 against Singular's 1.0. OpAmplifiers also leads on in-app purchases (none vs 3) and ads (none vs shown). Singular's advantage is update cadence (daily vs every 6 weeks). On price, ratings volume and device support there is nothing between them.

Both are free to download. Singular sells 3 in-app purchases, starting at $4.99 per 7 days. OpAmplifiers asks for nothing beyond the download.

OpAmplifiers holds the better App Store score, 2.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

OpAmplifiers ships an update every 6 weeks, Singular daily. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | OpAmplifiers | Singular |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/opamplifiers/id700960348/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/singular-circuit-simulator/id6760304619/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Daily** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 18 MB |
| Requires iOS | **6.0** | 18.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kyrill Cousson](https://appshunter.io/developer/478650872) | [Ali Mert TUFEKCI](https://appshunter.io/developer/1483311309) |

## 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


### Singular

[App page](https://appshunter.io/ios/app/singular-circuit-simulator/id6760304619)

Design, simulate, and analyze analog and logic circuits on your mobile device. Features a powerful engine, a wide range of components, and an intuitive editor. Ideal for students, makers, and professionals.

**Highlights:** Analog & logic circuit simulation, Drag-and-drop circuit editor, Real-time transient, DC, and AC analysis, 40+ electronic components, Real-time oscilloscope, Offline functionality, Export and import circuits

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $4.99 | per 7 days |
| Weekly Plan | $9.99 | per month |
| Yearly Plan | $29.99 | per year |


## Frequently asked questions

### Is OpAmplifiers free?

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

### Is Singular free?

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

### Which has better reviews, OpAmplifiers or Singular?

OpAmplifiers is rated higher. OpAmplifiers averages 2.0 out of 5 from 1 ratings, while Singular averages 1.0 from 1 ratings.

### Do OpAmplifiers or Singular have ads?

Singular shows ads; OpAmplifiers does not.

### Which is updated more often, OpAmplifiers or Singular?

OpAmplifiers ships an update every 6 weeks, and Singular daily. Most recently, OpAmplifiers was updated on November 1, 2026 and Singular on October 28, 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.*