# PIDTune vs Ultra Boost Revo

The clearest difference is price: Ultra Boost Revo at Free against PIDTune's $4.99. Ultra Boost Revo also leads on update cadence (every 2 months vs every 4 months) and iOS requirement (9.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Ultra Boost Revo 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, Ultra Boost Revo every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | PIDTune | Ultra Boost Revo |
| --- | --- | --- |
| 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 2 months** |
| Monetization | Paid | — |
| Size | 1 MB | 100 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Richard H Street](https://appshunter.io/developer/954888336) | [ECU=SHOP](https://appshunter.io/developer/1389703440) |

## 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


### Ultra Boost Revo

[App page](https://appshunter.io/ios/app/ultra-boost-revo/id1485523655)

**In-app purchases:** none


## Frequently asked questions

### Is PIDTune free?

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

### Is Ultra Boost Revo free?

Ultra Boost Revo is free to download, with no in-app purchases.

### Do PIDTune or Ultra Boost Revo have ads?

Neither PIDTune nor Ultra Boost Revo shows ads.

### Which is updated more often, PIDTune or Ultra Boost Revo?

PIDTune ships an update every 4 months, and Ultra Boost Revo every 2 months. Most recently, PIDTune was updated on November 2, 2026 and Ultra Boost Revo on November 3, 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.*