# PIDTune vs Instrument Toolbox

The clearest difference is update cadence: Instrument Toolbox at weekly against PIDTune's every 4 months. Instrument Toolbox also leads on price ($1.99 vs $4.99) and iOS requirement (13.0 vs 15.0). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

PIDTune costs $4.99 and Instrument Toolbox $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PIDTune ships an update every 4 months, Instrument Toolbox weekly. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | PIDTune | Instrument Toolbox |
| --- | --- | --- |
| Price | $4.99 | **$1.99** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pidtune/id1045174726/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Paid | Paid |
| Size | 1 MB | 8 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Richard H Street](https://appshunter.io/developer/954888336) | [立娜 王](https://appshunter.io/developer/1761096632) |

## What reviewers say

### PIDTune

[App page](https://appshunter.io/ios/app/pidtune/id1045174726)

This utility calculates PID tuning parameters using the IMC method for various process and controller types. It allows for direct input of process gain or variable changes, with adjustable tuning aggression via a slider.

**Highlights:** IMC method for PID tuning, Calculates Kc, Ti, Td, Supports FO, SO, and I process types, Handles Parallel and Series controller types, Adjustable tuning aggression slider, Input process gain or variable changes

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

**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 PIDTune free?

PIDTune costs $4.99, with no in-app purchases.

### Is Instrument Toolbox free?

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

### Do PIDTune or Instrument Toolbox have ads?

Neither PIDTune nor Instrument Toolbox shows ads.

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

PIDTune ships an update every 4 months, and Instrument Toolbox weekly. Most recently, PIDTune was updated on September 21, 2026 and Instrument Toolbox on September 23, 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.*