# Timer 555 Calculator vs Capacitor

The clearest difference is rating: Capacitor at 4.8 against Timer 555 Calculator's 3.9. Capacitor also leads on in-app purchases (none vs 1). Timer 555 Calculator's advantage is update cadence (every 3 months vs every 40 months) and iOS requirement (13.2 vs 26.0). On price, review sentiment, ratings volume and ads there is nothing between them.

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

Capacitor holds the better App Store score, 4.8 against 3.9. Both are backed by a comparable volume of ratings — 8 and 10 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Timer 555 Calculator ships an update every 3 months, Capacitor every 40 months. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Timer 555 Calculator | Capacitor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (8 ratings)](https://appshunter.io/ios/app/timer-555-calculator/id834044557/reviews) | **[4.8 (10 ratings)](https://appshunter.io/ios/app/capacitor-converter/id6447107842/reviews)** |
| Number of ratings | 8 | **10** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 40 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 3 MB | 8 MB |
| Requires iOS | **13.2** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Gerhard Lentschik](https://appshunter.io/developer/629988041) |

## 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 |


### Capacitor

[App page](https://appshunter.io/ios/app/capacitor-converter/id6447107842)

Easily determine capacitor values from color codes or calculate color codes from values. Supports both standard and SMD capacitors, providing quick and accurate conversions for electronics projects.

**Highlights:** Capacitor color code to value conversion, Value to capacitor color code conversion, SMD capacitor code to value conversion, SMD value to EIA code calculation, Supports standard and SMD capacitors

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

**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 Capacitor free?

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

### Which has better reviews, Timer 555 Calculator or Capacitor?

Capacitor is rated higher. Timer 555 Calculator averages 3.9 out of 5 from 8 ratings, while Capacitor averages 4.8 from 10 ratings.

### Do Timer 555 Calculator or Capacitor have ads?

Neither Timer 555 Calculator nor Capacitor shows ads.

### Which is updated more often, Timer 555 Calculator or Capacitor?

Timer 555 Calculator ships an update every 3 months, and Capacitor every 40 months. Most recently, Timer 555 Calculator was updated on October 21, 2026 and Capacitor 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.*