# 555 Calc vs AgXcel Calculators

The clearest difference is rating: 555 Calc at 4.0 against AgXcel Calculators's 3.0. 555 Calc also leads on iOS requirement (11.0 vs 15.0). AgXcel Calculators's advantage is ads (none vs shown) and update cadence (fortnightly vs every 20 months). On price, ratings volume, 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.

555 Calc holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

555 Calc ships an update every 20 months, AgXcel Calculators fortnightly. The most recent releases landed on June 1, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | 555 Calc | AgXcel Calculators |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/555-calc/id868058244/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/agxcel-calculators/id1069444662/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 20 months | **Fortnightly** |
| Monetization | Ad-supported | **Free** |
| Size | 18 MB | 2 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jibiki Works](https://appshunter.io/developer/556845808) | [AgXcel](https://appshunter.io/developer/1069444661) |

## 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

**In-app purchases:** none


### AgXcel Calculators

[App page](https://appshunter.io/ios/app/agxcel-calculators/id1069444662)

Achieve your desired GPA with precise calculations. This application helps determine the exact orifice or microtube size needed for optimal pressure settings in your application.

**Highlights:** Target GPA calculation, Precise orifice size determination, Microtube size calculation, Optimal pressure setting guidance, Application guesswork removal

**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 AgXcel Calculators free?

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

### Which has better reviews, 555 Calc or AgXcel Calculators?

555 Calc is rated higher. 555 Calc averages 4.0 out of 5 from 3 ratings, while AgXcel Calculators averages 3.0 from 2 ratings.

### Do 555 Calc or AgXcel Calculators have ads?

555 Calc shows ads; AgXcel Calculators does not.

### Which is updated more often, 555 Calc or AgXcel Calculators?

555 Calc ships an update every 20 months, and AgXcel Calculators fortnightly. Most recently, 555 Calc was updated on June 1, 2026 and AgXcel Calculators on August 12, 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.*