# Operational Amplifiers Guide vs Circuit Simulator Q

The clearest difference is in-app purchases: Operational Amplifiers Guide at none against Circuit Simulator Q's 2. Circuit Simulator Q's advantage is ads (none vs shown) and update cadence (every 2 days vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Circuit Simulator Q sells 2 in-app purchases, starting at $4.99 per 7 days. Operational Amplifiers Guide asks for nothing beyond the download.

Operational Amplifiers Guide ships an update every 2 months, Circuit Simulator Q every 2 days. Both last shipped on September 19, 2026.

## The numbers

| Metric | Operational Amplifiers Guide | Circuit Simulator Q |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.7 (3 ratings)](https://appshunter.io/ios/app/circuit-simulator-q/id6742368702/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 17 MB | 190 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [Ali Mert TUFEKCI](https://appshunter.io/developer/1483311309) |

## What reviewers say

### Operational Amplifiers Guide

[App page](https://appshunter.io/ios/app/operational-amplifiers-guide/id6467499897)

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

**In-app purchases:** none


### Circuit Simulator Q

[App page](https://appshunter.io/ios/app/circuit-simulator-q/id6742368702)

Design and simulate complex digital logic circuits with an intuitive interface. Explore basic gates, build counters, ALUs, and even create your own processors. This tool brings your digital electronics ideas to life.

**Highlights:** Advanced circuit design, Qnet netlist algorithm, Build counter circuits and flip-flops, Construct Arithmetic Logic Units (ALUs), Design custom processors

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

**In-app purchases (2)**

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


## Frequently asked questions

### Is Operational Amplifiers Guide free?

Operational Amplifiers Guide is free to download, with no in-app purchases.

### Is Circuit Simulator Q free?

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

### Do Operational Amplifiers Guide or Circuit Simulator Q have ads?

Operational Amplifiers Guide shows ads; Circuit Simulator Q does not.

### Which is updated more often, Operational Amplifiers Guide or Circuit Simulator Q?

Operational Amplifiers Guide ships an update every 2 months, and Circuit Simulator Q every 2 days. Most recently, Operational Amplifiers Guide was updated on September 19, 2026 and Circuit Simulator Q on September 19, 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.*