# Fault Current Calculator — user reviews

> 10 indexed App Store user reviews of Fault Current Calculator by Cooper Bussmann, LLC, rated 3.10/5 from 23 ratings.

- Source: https://appshunter.io/ios/app/fault-current-calculator/id647477910/reviews
- App overview in markdown: https://appshunter.io/ios/app/fault-current-calculator/id647477910.md
- Rating breakdown: 5★ 9 · 4★ 2 · 3★ 2 · 2★ 3 · 1★ 7

## Most critical reviews (10 lowest-rated)

### 1/5 — Stuck in update

*2025-07-17*

Used to work great- forced to pay for the upgraded version that doesn’t work.  Its stuck in the spinning wheel of updating

### 1/5 — Can’t even open the app

*2025-06-17*

Stuck on a black screen, please update

### 1/5 — Could be 5 star

*2025-06-13*

This app secretly updated itself to a pro version which I am not paying for. I can no longer download the standard version.

### 1/5 — Bussmann fault app

*2018-10-05*

This app does not work with the new iOS upgrade that Apple just put out to their phones, especially their older phones I agree with the previous review need to get this corrected!

### 1/5 — Doesn’t work on ios12

*2018-10-05*

Display and keyboard is all messed up in iOS 12

### 1/5 — Broken for iOS 12

*2018-09-26*

Will not work for iOS 12. Needs an update.

### 1/5 — App doesn’t work anymore

*2018-09-25*

I used this app for a couple of years, worked great. Got new phone and ios12 now the app doesn’t work.

### 2/5 — Basically it’s a label creator

*2023-03-02*

Basically it’s a label creator,  kinda silly and poorly designed.

### 3/5 — Two issues

*2018-10-08*

Will not allow selection of 10kVA transformer. Will not email labels with iOS 12.
For my use, these are small problems that if fixed would garner the app 5 stars from me.

### 3/5 — Amazing app with two (significant) flaws

*2018-03-14*

This app is free, and saves an incredible amount of time. It would garner 5 stars, except for two significant flaws: Firstly, you can only map one branch at a time, which means mapping a system with multiple branches requires you to restart for each branch. 

Secondly, and most importantly, hitting the home button completely resets your progress. This makes the app almost unusable; if you stop to take a call or text, you have to start over. If this glaring issue was fixed, 4-5 stars would be warranted. On the other hand, this app also exists on Bussmann’s website, without this issue. For the time being, I recommend using the app there.

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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 2026-08-20.*