# Operational Amplifiers Guide vs Series Parallel Circuit Solver

The clearest difference is update cadence: Operational Amplifiers Guide at every 2 months against Series Parallel Circuit Solver's every 24 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Operational Amplifiers Guide ships an update every 2 months, Series Parallel Circuit Solver every 24 months. The most recent releases landed on October 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Operational Amplifiers Guide | Series Parallel Circuit Solver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (4 ratings)](https://appshunter.io/ios/app/series-parallel-circuit-solver/id6737332345/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 2 months** | Every 24 months |
| Monetization | — | Ad-supported |
| Size | 17 MB | 35 MB |
| Requires iOS | 16.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [Muhammad Awais Younas](https://appshunter.io/developer/1771187232) |

## 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


### Series Parallel Circuit Solver

[App page](https://appshunter.io/ios/app/series-parallel-circuit-solver/id6737332345)

Calculate resistors, capacitors, and inductors in series and parallel circuits. This tool simplifies complex electrical circuit analysis for professionals and students, providing instant, accurate results for various configurations.

**Highlights:** Series and parallel calculations, Resistor, capacitor, and inductor calculation, Mixed circuit solver, User-friendly interface, Instant results, Circuit analysis

**In-app purchases:** none


## Frequently asked questions

### Is Operational Amplifiers Guide free?

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

### Is Series Parallel Circuit Solver free?

Series Parallel Circuit Solver is free to download, with no in-app purchases.

### Do Operational Amplifiers Guide or Series Parallel Circuit Solver have ads?

Both Operational Amplifiers Guide and Series Parallel Circuit Solver show ads.

### Which is updated more often, Operational Amplifiers Guide or Series Parallel Circuit Solver?

Operational Amplifiers Guide ships an update every 2 months, and Series Parallel Circuit Solver every 24 months. Most recently, Operational Amplifiers Guide was updated on October 1, 2026 and Series Parallel Circuit Solver on October 24, 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.*