# 720 Rule Calculator — Calculator

> Aluminum anodizing calculator for current, time, and oxide thickness. (iPhone/iPad app by Gizmo Products Inc..)

- Source: https://appshunter.io/ios/app/720-rule-calculator/id6748957409 (this page in markdown: same URL + `.md`)
- Developer: [Gizmo Products Inc.](https://appshunter.io/developer/1828226668)
- Category: Utilities, Reference
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 12.0 · 40 MB
- Languages: American English
- Released: 2025-08-04
- Data updated: 2026-08-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/720-rule-calculator/id6748957409/reviews.md

## What is 720 Rule Calculator?

A calculator to be used in aluminum anodizing to determine the relationship between current, time, and the resulting oxide layer thickness.

## Key features

- Aluminum anodizing calculations
- Current, time, and thickness relationship
- Oxide layer thickness determination
- Utilities for anodizing process


## Frequently asked questions about 720 Rule Calculator

### What is the 720 Rule Calculator used for?

The 720 Rule Calculator is specifically designed for aluminum anodizing. It helps users determine the relationship between electrical current, the duration of the anodizing process, and the resulting thickness of the oxide layer.

### Is the 720 Rule Calculator free to use?

Yes, the 720 Rule Calculator is available for free. There are no costs associated with downloading or using its core functionalities.

### What devices does the 720 Rule Calculator support?

The 720 Rule Calculator is compatible with iPhone, iPad, and iPod devices. It is designed to run on Apple's mobile operating system.

### How often is the 720 Rule Calculator updated?

The 720 Rule Calculator was last updated on August 21, 2025, with version 1.1. This indicates a recent update, suggesting ongoing support and potential improvements.

### What is the age rating for the 720 Rule Calculator?

The 720 Rule Calculator has an age rating of 4+. This means it is considered suitable for users of all ages, with no mature content.

### Does the 720 Rule Calculator have ads?

No, the 720 Rule Calculator does not contain advertisements. Users can utilize its features without any interruptions from ads.

### What is the user feedback on the 720 Rule Calculator?

The 720 Rule Calculator has received excellent user feedback, with a perfect 5.0-star rating from one review. This suggests a highly positive initial user experience.

### Who developed the 720 Rule Calculator?

The 720 Rule Calculator was developed by Gizmo Products Inc. They are the company responsible for its creation and maintenance.

## Version history (last 2 releases)

### 1.1 — 2025-08-21

- Added ability to create notes of the calculations and view its history.
- Added ability to delete a note.
- Added UI fixes and improvements.
- Added a list of alarm tones to select from.
- fixed: alarm should not stop unless user stops it.

### 1.0 — 2025-08-04

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*