# Series Parallel Circuit Solver vs InboxGuard

The clearest difference is ads: InboxGuard at none against Series Parallel Circuit Solver's shown. InboxGuard also leads on update cadence (monthly vs every 24 months). Series Parallel Circuit Solver's advantage is iOS requirement (15.5 vs 17.6). On price, 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.

Series Parallel Circuit Solver ships an update every 24 months, InboxGuard monthly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Series Parallel Circuit Solver | InboxGuard |
| --- | --- | --- |
| 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 | **No** |
| Update frequency | Every 24 months | **Monthly** |
| Monetization | Ad-supported | — |
| Size | 35 MB | 4 MB |
| Requires iOS | **15.5** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Muhammad Awais Younas](https://appshunter.io/developer/1771187232) | [Shashwat Patel](https://appshunter.io/developer/1873309489) |

## What reviewers say

### 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


### InboxGuard

[App page](https://appshunter.io/ios/app/inboxguard/id6762069042)

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

**In-app purchases:** none


## Frequently asked questions

### Is Series Parallel Circuit Solver free?

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

### Is InboxGuard free?

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

### Do Series Parallel Circuit Solver or InboxGuard have ads?

Series Parallel Circuit Solver shows ads; InboxGuard does not.

### Which is updated more often, Series Parallel Circuit Solver or InboxGuard?

Series Parallel Circuit Solver ships an update every 24 months, and InboxGuard monthly. Most recently, Series Parallel Circuit Solver was updated on October 24, 2026 and InboxGuard 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.*