# PIDTune vs 369Sonic

The clearest difference is price: 369Sonic at Free against PIDTune's $4.99. 369Sonic also leads on update cadence (every 9 days vs every 4 months) and iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

369Sonic is free to download; PIDTune costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PIDTune ships an update every 4 months, 369Sonic every 9 days. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | PIDTune | 369Sonic |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| 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 | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Paid | — |
| Size | 1 MB | 46 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Richard H Street](https://appshunter.io/developer/954888336) | [369sonic s.r.o.](https://appshunter.io/developer/1740955289) |

## 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


### 369Sonic

[App page](https://appshunter.io/ios/app/369sonic/id6496356519)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PIDTune free?

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

### Is 369Sonic free?

369Sonic is free to download, with no in-app purchases.

### Do PIDTune or 369Sonic have ads?

Neither PIDTune nor 369Sonic shows ads.

### Which is updated more often, PIDTune or 369Sonic?

PIDTune ships an update every 4 months, and 369Sonic every 9 days. Most recently, PIDTune was updated on October 8, 2026 and 369Sonic on October 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*