# Unit Converter Pro HD. vs Simplify & Solve Equation PRO

The clearest difference is rating: Simplify & Solve Equation PRO at 5.0 against Unit Converter Pro HD.'s 4.6. Simplify & Solve Equation PRO also leads on update cadence (monthly vs every 2 months). Unit Converter Pro HD.'s advantage is ratings volume (187 vs 3) and price ($0.99 vs $1.99). On ads, in-app purchases and device support there is nothing between them.

Unit Converter Pro HD. costs $0.99 and Simplify & Solve Equation PRO $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Simplify & Solve Equation PRO holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Unit Converter Pro HD. has 187 ratings behind it against 3, so its average is the more settled of the two.

Unit Converter Pro HD. ships an update every 2 months, Simplify & Solve Equation PRO monthly. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Unit Converter Pro HD. | Simplify & Solve Equation PRO |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | [4.6 (187 ratings)](https://appshunter.io/ios/app/unit-converter-pro-hd/id458584668/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/simplify-and-solve-equation-pro/id1500087480/reviews)** |
| Number of ratings | **187** | 3 |
| Positive reviews | 86.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | **Free** | Paid |
| Size | 13 MB | 182 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [良峰 侯](https://appshunter.io/developer/654444245) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Unit Converter Pro HD.

[App page](https://appshunter.io/ios/app/unit-converter-pro-hd/id458584668)

Easily convert between over 700 units of measure across 30 categories. This powerful tool acts as a universal assistant for all your conversion needs, saving you time and effort.

**Highlights:** 30 conversion categories, Over 700 units of measure, Backspace key for corrections, Intuitive and easy to use, Supports Dark Mode

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and efficient
- 👍 Easy to use
- 👍 Comprehensive unit conversions
- 👍 Accurate calculations
- 👍 Handy and useful

**What reviewers complain about**

- 🐛 Missing some important units
- 🔍 Difficult to navigate and find desired units
- 🔍 Cluttered interface with too many options
- 🔋 High battery consumption

**Reported bugs**

- Incorrect fuel consumption conversions
- Conversion values disappearing after update

**Requested features**

- Add support for more units (e.g. knots, stone, electron volts)
- Improve navigation and make it easier to find desired units
- Add portrait mode support
- Optimize interface for better usability


### Simplify & Solve Equation PRO

[App page](https://appshunter.io/ios/app/simplify-and-solve-equation-pro/id1500087480)

This app quickly finds the solution for 'x' in algebraic equations. It shows every step of the simplification process, from complex terms to a simple form, before solving numerically. Supports decimals, constants, and variables, with a history function to save inputs.

**Highlights:** Solves algebraic equations for 'x', Shows step-by-step simplification, Numeric algorithm for solutions, Supports decimals, constants, and variables, History function to save inputs, Highlights incorrect entries

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter Pro HD. free?

Unit Converter Pro HD. costs $0.99, with no in-app purchases.

### Is Simplify & Solve Equation PRO free?

Simplify & Solve Equation PRO costs $1.99, with no in-app purchases.

### Which has better reviews, Unit Converter Pro HD. or Simplify & Solve Equation PRO?

Simplify & Solve Equation PRO is rated higher. Unit Converter Pro HD. averages 4.6 out of 5 from 187 ratings, while Simplify & Solve Equation PRO averages 5.0 from 3 ratings.

### Do Unit Converter Pro HD. or Simplify & Solve Equation PRO have ads?

Neither Unit Converter Pro HD. nor Simplify & Solve Equation PRO shows ads.

### Which is updated more often, Unit Converter Pro HD. or Simplify & Solve Equation PRO?

Unit Converter Pro HD. ships an update every 2 months, and Simplify & Solve Equation PRO monthly. Most recently, Unit Converter Pro HD. was updated on October 29, 2026 and Simplify & Solve Equation PRO on October 24, 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.*