# 555 Calc vs Tangle

The clearest difference is in-app purchases: 555 Calc at none against Tangle's 1. 555 Calc also leads on device support (3 vs 1) and iOS requirement (11.0 vs 17.0). Tangle's advantage is ads (none vs shown). On price there is nothing between them.

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

## The numbers

| Metric | 555 Calc | Tangle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/555-calc/id868058244/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 20 months | — |
| Monetization | Ad-supported | — |
| Size | 18 MB | 0 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jibiki Works](https://appshunter.io/developer/556845808) | [Joshua Deitel](https://appshunter.io/developer/6774584502) |

## 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


### Tangle

[App page](https://appshunter.io/ios/app/tangle-cable-tracker/id6787653078)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tangle Pro | $2.99 | one-time |


## Frequently asked questions

### Is 555 Calc free?

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

### Is Tangle free?

Tangle is free to download, with in-app purchases available.

### Do 555 Calc or Tangle have ads?

555 Calc shows ads; Tangle does not.

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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.*