# PIDTune vs Bit Converter Plus

The clearest difference is review sentiment: PIDTune at 100% against Bit Converter Plus's 0%. PIDTune also leads on rating (5.0 vs 1.0) and update cadence (every 4 months vs every 38 months). Bit Converter Plus's advantage is price ($2.99 vs $4.99) and iOS requirement (13 vs 15.0). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

PIDTune costs $4.99 and Bit Converter Plus $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PIDTune holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 100% of PIDTune's written reviews are positive against 0% of Bit Converter Plus's.

PIDTune ships an update every 4 months, Bit Converter Plus every 38 months. The most recent releases landed on September 21, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | PIDTune | Bit Converter Plus |
| --- | --- | --- |
| Price | $4.99 | **$2.99** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pidtune/id1045174726/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/bit-converter-plus/id6444597507/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 38 months |
| Monetization | Paid | Paid |
| Size | 1 MB | 1 MB |
| Requires iOS | 15.0 | **13** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Richard H Street](https://appshunter.io/developer/954888336) | [Heng Jia Liang](https://appshunter.io/developer/1532000635) |

## 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


### Bit Converter Plus

[App page](https://appshunter.io/ios/app/bit-converter-plus/id6444597507)

Easily convert between various units of digital information, including bits, bytes, kilobytes, megabytes, and more. The calculator handles conversions for all units and offers flexibility in defining the value of 'K' for different calculation types.

**Highlights:** Converts bits, bytes, KB, MB, GB, TB, PB, EB, ZB, YB, Supports both 1000 and 1024 for 'K' calculations, Explains differences between bits and bytes, Dark Mode support, Offline functionality, Minimal storage space usage

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PIDTune free?

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

### Is Bit Converter Plus free?

Bit Converter Plus costs $2.99, with no in-app purchases.

### Which has better reviews, PIDTune or Bit Converter Plus?

PIDTune is rated higher. PIDTune averages 5.0 out of 5 from 2 ratings, while Bit Converter Plus averages 1.0 from 1 ratings.

### Do PIDTune or Bit Converter Plus have ads?

Neither PIDTune nor Bit Converter Plus shows ads.

### Which is updated more often, PIDTune or Bit Converter Plus?

PIDTune ships an update every 4 months, and Bit Converter Plus every 38 months. Most recently, PIDTune was updated on September 21, 2026 and Bit Converter Plus on September 16, 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.*