# Mathematics vs PML Engineer Exam Prep

The clearest difference is price: PML Engineer Exam Prep at Free against Mathematics's $0.99. PML Engineer Exam Prep also leads on update cadence (every 3 months vs every 10 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

PML Engineer Exam Prep is free to download; Mathematics costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mathematics ships an update every 10 months, PML Engineer Exam Prep every 3 months. The most recent releases landed on September 24, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Mathematics | PML Engineer Exam Prep |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 months** |
| Size | 3 MB | 27 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Rutkowskij](https://appshunter.io/developer/518370415) | [Davy Raitt](https://appshunter.io/developer/1795318281) |

## What reviewers say

### Mathematics

[App page](https://appshunter.io/ios/app/mathematics-multiplication/id683788492)

**Features:** macOS Compatibility

**In-app purchases:** none


### PML Engineer Exam Prep

[App page](https://appshunter.io/ios/app/pml-engineer-exam-prep/id6757166329)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mathematics free?

Mathematics costs $0.99, with no in-app purchases.

### Is PML Engineer Exam Prep free?

PML Engineer Exam Prep is free to download, with no in-app purchases.

### Do Mathematics or PML Engineer Exam Prep have ads?

Neither Mathematics nor PML Engineer Exam Prep shows ads.

### Which is updated more often, Mathematics or PML Engineer Exam Prep?

Mathematics ships an update every 10 months, and PML Engineer Exam Prep every 3 months. Most recently, Mathematics was updated on September 24, 2026 and PML Engineer Exam Prep on September 28, 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.*