# Timer 555 Calculator vs Electro Port

The clearest difference is rating: Electro Port at 5.0 against Timer 555 Calculator's 3.9. Electro Port also leads on in-app purchases (none vs 1). Timer 555 Calculator's advantage is ratings volume (8 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Timer 555 Calculator sells 1 one-off in-app purchase. Electro Port asks for nothing beyond the download.

Electro Port holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Timer 555 Calculator has 8 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | Timer 555 Calculator | Electro Port |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (8 ratings)](https://appshunter.io/ios/app/timer-555-calculator/id834044557/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/electro-port/id6444053417/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 3 MB | 41 MB |
| Requires iOS | 13.2 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [UTSOURCE HOLDING COMPANY LIMITED](https://appshunter.io/developer/1076084259) |

## What reviewers say

### Timer 555 Calculator

[App page](https://appshunter.io/ios/app/timer-555-calculator/id834044557)

Calculate monostable and astable circuits for electronics projects. Determine pulse width and frequency, find component combinations, and save/upload data. Supports multiple languages.

**Highlights:** Monostable circuit pulse width calculation, Astable circuit frequency calculation, Component combination finder, Save component values to CSV, Upload CSV via AirDrop/iCloud Drive, Multi-language support

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro feature | $0.99 | one-time |


### Electro Port

[App page](https://appshunter.io/ios/app/electro-port/id6444053417)

A free utility app for electronics hobbyists offering a suite of tools for calculations and data analysis. It simplifies complex electronic tasks with practical calculators and data sets.

**Highlights:** Color ring resistance calculator, Battery charging time calculation, Battery lifetime calculation, Coil inductance calculation, Capacitor color code calculation, LED circuit power consumption calculation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Timer 555 Calculator free?

Timer 555 Calculator is free to download, with in-app purchases available.

### Is Electro Port free?

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

### Which has better reviews, Timer 555 Calculator or Electro Port?

Electro Port is rated higher. Timer 555 Calculator averages 3.9 out of 5 from 8 ratings, while Electro Port averages 5.0 from 1 ratings.

### Do Timer 555 Calculator or Electro Port have ads?

Neither Timer 555 Calculator nor Electro Port shows ads.

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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.*