# Forney vs Instrument Toolbox

The clearest difference is price: Forney at Free against Instrument Toolbox's $1.99. Instrument Toolbox's advantage is update cadence (weekly vs every 8 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Forney is free to download; Instrument Toolbox costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Forney ships an update every 8 months, Instrument Toolbox weekly. The most recent releases landed on September 30, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Forney | Instrument Toolbox |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/forney/id1350241170/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Weekly** |
| Monetization | **Free** | Paid |
| Size | 14 MB | 8 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Forney Corporation](https://appshunter.io/developer/1350241169) | [立娜 王](https://appshunter.io/developer/1761096632) |

## What reviewers say

### Forney

[App page](https://appshunter.io/ios/app/forney/id1350241170)

This utility app provides real-time monitoring of combustion processes via a connected hardware detector. It clearly indicates flame status and offers detailed insights into flame intensity across IR and UV spectrums. The app is designed for safety monitoring and fault diagnosis.

**Highlights:** Flame on/off status indication, Flame intensity details (IR/UV), Flame discrimination settings, System fault display, Bluetooth connectivity

**Features:** macOS Compatibility

**In-app purchases:** none


### Instrument Toolbox

[App page](https://appshunter.io/ios/app/instrument-toolbox/id6698856248)

A professional calculator designed for industrial control, automation, and instrumentation engineers. It offers quick conversions and calculations for gas concentration, units, steam properties, flange levels, and pipeline flow. Ideal for both field debugging and engineering design.

**Highlights:** PPM to mg/m³ conversion with compensation, Industrial unit conversion (pressure, volume, temp, etc.), Saturated steam pressure and density calculator, Flange level migration calculations, Pipeline flow and velocity calculator, Real-time calculation results

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

**In-app purchases:** none


## Frequently asked questions

### Is Forney free?

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

### Is Instrument Toolbox free?

Instrument Toolbox costs $1.99, with no in-app purchases.

### Do Forney or Instrument Toolbox have ads?

Neither Forney nor Instrument Toolbox shows ads.

### Which is updated more often, Forney or Instrument Toolbox?

Forney ships an update every 8 months, and Instrument Toolbox weekly. Most recently, Forney was updated on September 30, 2026 and Instrument Toolbox on October 9, 2026.

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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.*