# PIDTune vs NK

The clearest difference is ads: PIDTune at none against NK's shown. PIDTune also leads on price ($4.99 vs $9.99). NK's advantage is chart position (#197 vs unranked) and iOS requirement (12.0 vs 15.0). On update cadence, in-app purchases and device support there is nothing between them.

PIDTune costs $4.99 and NK $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PIDTune ships an update every 4 months, NK every 3 months. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | PIDTune | NK |
| --- | --- | --- |
| Price | **$4.99** | $9.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pidtune/id1045174726/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Paid | — |
| Best chart rank | — | **#197** |
| Size | 1 MB | 80 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Richard H Street](https://appshunter.io/developer/954888336) | [NK RACING PARTS COMPANY LIMITED](https://appshunter.io/developer/1500859331) |

## 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


### NK

[App page](https://appshunter.io/ios/app/nk-fullstandnext-pro/id1547578451)

**Currently charting:** #197 Top Paid · Utilities (US App Store)

**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 NK free?

NK costs $9.99, with no in-app purchases.

### Do PIDTune or NK have ads?

NK shows ads; PIDTune does not.

### Which is updated more often, PIDTune or NK?

PIDTune ships an update every 4 months, and NK every 3 months. Most recently, PIDTune was updated on October 8, 2026 and NK on October 14, 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.*