# Poly Thai Reader vs Engineering Mathematics Pro

The clearest difference is price: Poly Thai Reader at Free against Engineering Mathematics Pro's $0.49. Engineering Mathematics Pro's advantage is in-app purchases (none vs 3) and iOS requirement (13.0 vs 17.4). On ads and device support there is nothing between them.

Poly Thai Reader is free to download; Engineering Mathematics Pro costs $0.49 up front. Poly Thai Reader sells 3 in-app purchases, starting at $9.99 per month. Engineering Mathematics Pro asks for nothing beyond the download.

## The numbers

| Metric | Poly Thai Reader | Engineering Mathematics Pro |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/poly-thai-reader/id6636517794/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Free with in-app purchases | — |
| Size | 90 MB | 23 MB |
| Requires iOS | 17.4 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 17+ |
| Developer | [Edgar Ruiz](https://appshunter.io/developer/1738906314) | [Manish Kumar](https://appshunter.io/developer/1854995154) |

## What reviewers say

### Poly Thai Reader

[App page](https://appshunter.io/ios/app/poly-thai-reader/id6636517794)

This app offers a library of graded Thai stories with native audio and instant word definitions to help learners improve their reading comprehension and vocabulary. It features adjustable audio speed, romanization toggles, and grammar explanations for various learning levels.

**Highlights:** Graded Thai stories, Native Thai audio with adjustable speed, Instant word definitions, Favorite words list, Romanization toggle, Grammar explanations, 5 reading levels

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $9.99 | per month |
| Yearly | $69.99 | per year |
| Poly Thai Reader - Lifetime | $99.99 | one-time |


### Engineering Mathematics Pro

[App page](https://appshunter.io/ios/app/engineering-mathematics-pro/id6759188492)

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

**In-app purchases:** none


## Frequently asked questions

### Is Poly Thai Reader free?

Poly Thai Reader is free to download, with in-app purchases available.

### Is Engineering Mathematics Pro free?

Engineering Mathematics Pro costs $0.49, with no in-app purchases.

### Do Poly Thai Reader or Engineering Mathematics Pro have ads?

Neither Poly Thai Reader nor Engineering Mathematics Pro shows ads.

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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.*