# JCTools — Engineering Formulas

> Engineering formulas for hydraulics, electrical, mechanical, and programming. (iPhone/iPad app by Joe Riedley.)

- Source: https://appshunter.io/ios/app/jctools/id1512655120 (this page in markdown: same URL + `.md`)
- Developer: [Joe Riedley](https://appshunter.io/developer/1512655119)
- Category: Business, Productivity
- Price: Free
- Rating: 5.00/5 from 6 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 10 MB
- Languages: English
- Released: 2020-05-11
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/jctools/id1512655120/reviews.md

## What is JCTools?

General formulas for hydraulic, electrical, mechanical and programming. 

Features:
Unit selection calculations:
Cylinder flow/force/volume
Accumulator flow/volume
Pipe Velocity
Electrical
Resistor Color Code
Horsepower
Interpolation
Cable Pinouts

I will be continually adding new content.
If you have recommendations, please leave in comment section

Thank you

## Key features

- Hydraulic formulas
- Electrical calculations
- Mechanical formulas
- Programming tools
- Unit selection
- Resistor color code
- Cable pinouts

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/jctools/id1512655120/reviews.md

### 5/5 — Great app!

*2020-06-15*

Very Helpful!

### 5/5 — Good Job

*2020-05-13*

Great Tool!

**Developer response:** Thank you, 
I'm working hard to add new content.

### 5/5 — Hydraulic Engineer

*2020-05-11*

Great tool and works great!!!!!!!!!!!!!!!!!!!!!!!!!

**Developer response:** Thank you very much!

## Frequently asked questions about JCTools

### What types of engineering formulas does JCTools offer?

JCTools provides general formulas for hydraulic, electrical, mechanical, and programming applications. This includes calculations for cylinder and accumulator flow/volume, pipe velocity, resistor color codes, horsepower, and cable pinouts.

### Is JCTools available on Android devices?

Based on the provided information, JCTools is supported on iPhone, iPad, and iPod. There is no mention of Android device support.

### How often is JCTools updated with new content?

The developer states they will be continually adding new content. The app was last updated on June 13, 2020, to version 1.8.5.

### Can I suggest new formulas or features for JCTools?

Yes, users are encouraged to leave recommendations in the comment section for new content suggestions. The developer actively seeks user input for future updates.

### What is the age rating for JCTools?

JCTools has an age rating of 4+, making it suitable for a wide range of users including younger students and professionals.

### Does JCTools have ads?

No, JCTools does not contain advertisements. The app is free to download and use without any ad interruptions.

### What is the user feedback on JCTools?

JCTools has received excellent user feedback, with an average rating of 5.0 stars from 6 ratings, indicating high user satisfaction.

### Is JCTools suitable for professional engineers?

Yes, JCTools is designed for engineers and students in various disciplines, offering practical formulas and calculations for daily use.

## Version history (last 5 releases)

### 1.8.5 — 2020-06-13

Added Units selection on individual basis
Added Pipe Velocity Calculations

### 1.7.5 — 2020-06-09

Added Raspberry PI Pinouts

### 1.7.3 — 2020-06-08

Added pinouts menu

### 1.6.6 — 2020-06-07

Resistor bug fix
More help data

### 1.6.2 — 2020-06-05

Settings are now saved

## Apps similar to JCTools

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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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 2026-06-10.*