# 555 Calc vs Electrical Series Calculator

The clearest difference is rating: Electrical Series Calculator at 4.5 against 555 Calc's 4.0. Electrical Series Calculator also leads on update cadence (every 8 months vs every 20 months) and ratings volume (13 vs 3). 555 Calc's advantage is iOS requirement (11.0 vs 17.6). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Electrical Series Calculator holds the better App Store score, 4.5 against 4.0. Both are backed by a comparable volume of ratings — 3 and 13 respectively.

555 Calc ships an update every 20 months, Electrical Series Calculator every 8 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | 555 Calc | Electrical Series Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/555-calc/id868058244/reviews) | **[4.5 (13 ratings)](https://appshunter.io/ios/app/electrical-series-calculator/id967967501/reviews)** |
| Number of ratings | 3 | **13** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 20 months | **Every 8 months** |
| Monetization | Ad-supported | Ad-supported |
| Size | 18 MB | 39 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jibiki Works](https://appshunter.io/developer/556845808) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## What reviewers say

### 555 Calc

[App page](https://appshunter.io/ios/app/555-calc/id868058244)

This utility app helps engineers and hobbyists calculate resistor values for circuits using the Timer IC 555. Simply input frequency, duty ratio, and capacitor values to get the required resistor outputs.

**Highlights:** Calculate resistor values, Input frequency, Input duty ratio, Input capacitor value, Timer IC 555 circuit design

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

**In-app purchases:** none


### Electrical Series Calculator

[App page](https://appshunter.io/ios/app/electrical-series-calculator/id967967501)

This application simplifies electrical series calculations for resistance, inductance, and capacitance. It supports multiple units for flexible input and output, making complex computations quick and effortless for users.

**Highlights:** Resistance series calculation, Inductance series calculation, Capacitance series calculation, Supports multiple units (Ohms, KiloOhms, Farads, etc.), User-friendly interface, Calculations for series circuits

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

**In-app purchases:** none


## Frequently asked questions

### Is 555 Calc free?

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

### Is Electrical Series Calculator free?

Electrical Series Calculator is free to download, with no in-app purchases.

### Which has better reviews, 555 Calc or Electrical Series Calculator?

Electrical Series Calculator is rated higher. 555 Calc averages 4.0 out of 5 from 3 ratings, while Electrical Series Calculator averages 4.5 from 13 ratings.

### Do 555 Calc or Electrical Series Calculator have ads?

Both 555 Calc and Electrical Series Calculator show ads.

### Which is updated more often, 555 Calc or Electrical Series Calculator?

555 Calc ships an update every 20 months, and Electrical Series Calculator every 8 months. Most recently, 555 Calc was updated on November 1, 2026 and Electrical Series Calculator on November 4, 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.*