# Johnstone Supply Toolkit — user reviews

> 16 indexed App Store user reviews of Johnstone Supply Toolkit by Johnstone Supply, Inc., rated 3.30/5 from 4 ratings.

- Source: https://appshunter.io/ios/app/johnstone-supply-toolkit/id492852818/reviews
- App overview in markdown: https://appshunter.io/ios/app/johnstone-supply-toolkit/id492852818.md
- Rating breakdown: 5★ 1 · 4★ 1 · 3★ 1 · 2★ 0 · 1★ 1

## Most critical reviews (10 lowest-rated)

### 1/5 — Not accurate

*2020-10-16, version 2.2*

This app does not work. It gives you different numbers every time.

### 1/5 — Not working

*2013-11-11, version 1.4*

Not working on iPhone 4S since iPhone update. Deleted it

### 1/5 — Nh3

*2012-12-21, version 1.4*

Nh3 p/t not accurate and only goes to 13 hg

### 1/5 — HVAC Student

*2012-09-18, version 1.3*

Idk about the rest of the app but the pt chart is wrong for R-22

### 3/5 — No Metric Ductsizing

*2013-08-20, version 1.4*

The duct section is useless for engineers who do work globally.

### 4/5 — What about heat pumps?

*2012-05-17, version 1.3*

Handy app but would be top notch if it had a heat pump savings calculator. How about a heat pump vs propane furnace cost of operation?

### 5/5 — Update looks great

*2015-04-02, version 1.6*

I love this app since it includes so much free functionality include duct sizing, pt chart, and store locator. Great work.

### 5/5 — To HVAC student

*2012-09-21, version 1.3*

No the chart is not wrong for R22

### 5/5 — Very Useful Tool

*2012-03-10, version 1.1*

This app is great and makes my job much easier. Only suggestion is to enlarge the user interface a bit. Everything seems kind of small. Keep up the great work Johnstone!

### 5/5 — All you need

*2012-02-24, version 1.1*

I love this app. Every thing you need is here. Now I don't have to call and ask Jeff for tech. help.

## Most praised reviews (6 highest-rated)

### 5/5 — SWEET DREAMS HEATING AND COOLING SERVICE TECHNICIAN

*2012-01-28, version 1.1*

REMEMBERING THE DAYS FROM 63rd ST. YOU CAME ALONG WAY. GREAT JOB...

### 5/5 — Great

*2012-01-28, version 1.1*

Best app... Has all I need to do my job

### 5/5 — Efficiency Tools

*2012-01-18, version 1.0*

The Efficiency Tools are under the Tools tab at the bottom of the screen. There is AC Efficiency Savings and Furnace Efficiency Savings. I hope that helps. If not please contact support and we'll help out! LB

### 5/5 — I love my Job!

*2012-01-18, version 1.0*

This app is great. The features this app provides are very useful. Can't wait to share with our customers

### 5/5 — Great tools!

*2012-01-16, version 1.0*

Awesome set of reference tools and Store Locator. Can't wait for them to add more!!!

### 5/5 — Tools

*2012-01-16, version 1.0*

The efficiency tool will be useful

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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.*