# Digital Converter X vs PHD Actuator Sizing

The clearest difference is rating: PHD Actuator Sizing at 5.0 against Digital Converter X's 3.7. PHD Actuator Sizing also leads on update cadence (every 3 weeks vs every 9 months). Digital Converter X's advantage is device support (3 vs 1) and iOS requirement (8.0 vs 17.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PHD Actuator Sizing holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

Digital Converter X ships an update every 9 months, PHD Actuator Sizing every 3 weeks. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Digital Converter X | PHD Actuator Sizing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/digital-converter-x/id1438482132/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/phd-actuator-sizing/id6759474917/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 40 MB | 1 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Gaurav Mathur](https://appshunter.io/developer/1437746823) | [Krishna Meruva](https://appshunter.io/developer/1864409993) |

## What reviewers say

### Digital Converter X

[App page](https://appshunter.io/ios/app/digital-converter-x/id1438482132)

Easily convert numbers between various formats including binary, octal, decimal, and hexadecimal. Supports custom base conversions up to base 16. Ideal for students and professionals needing quick number system transformations.

**Highlights:** Binary conversion, Octal conversion, Decimal conversion, Hexadecimal conversion, BCD and Gray code support, Custom base n to base m conversion

**Features:** macOS Compatibility

**In-app purchases:** none


### PHD Actuator Sizing

[App page](https://appshunter.io/ios/app/phd-actuator-sizing/id6759474917)

This engineering tool helps automation professionals quickly size servo motors for industrial applications. It allows users to input motion profiles and automatically calculates torque and inertia for accurate motor selection. Generate detailed reports and verify performance against motor specifications.

**Highlights:** Select from full actuator lineup, Input motion profiles, Automatic RMS torque calculations, Inertia ratio verification, Peak torque and speed checks, Exportable sizing reports

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Digital Converter X free?

Digital Converter X is free to download, with no in-app purchases.

### Is PHD Actuator Sizing free?

PHD Actuator Sizing is free to download, with no in-app purchases.

### Which has better reviews, Digital Converter X or PHD Actuator Sizing?

PHD Actuator Sizing is rated higher. Digital Converter X averages 3.7 out of 5 from 3 ratings, while PHD Actuator Sizing averages 5.0 from 2 ratings.

### Do Digital Converter X or PHD Actuator Sizing have ads?

Neither Digital Converter X nor PHD Actuator Sizing shows ads.

### Which is updated more often, Digital Converter X or PHD Actuator Sizing?

Digital Converter X ships an update every 9 months, and PHD Actuator Sizing every 3 weeks. Most recently, Digital Converter X was updated on October 29, 2026 and PHD Actuator Sizing on October 31, 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.*