# Arithmetic HD vs Reading Train Christmas

The clearest difference is price: Reading Train Christmas at Free against Arithmetic HD's $1.99. Arithmetic HD's advantage is update cadence (every 9 months vs every 32 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Reading Train Christmas is free to download; Arithmetic HD costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Arithmetic HD ships an update every 9 months, Reading Train Christmas every 32 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Arithmetic HD | Reading Train Christmas |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/reading-train-christmas/id1056021768/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 32 months |
| Monetization | — | Free |
| Size | 17 MB | 653 MB |
| Requires iOS | 12.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kostakov Maxim](https://appshunter.io/developer/524964352) | [The Learning Station, LLC](https://appshunter.io/developer/702227887) |

## What reviewers say

### Arithmetic HD

[App page](https://appshunter.io/ios/app/arithmetic-hd/id686967632)

**Features:** macOS Compatibility

**In-app purchases:** none


### Reading Train Christmas

[App page](https://appshunter.io/ios/app/reading-train-christmas/id1056021768)

This app offers interactive Christmas-themed books, songs, and games designed to build foundational reading skills. It features multiple reading levels, professional narration, and a fun train game to reinforce learning. Parents can track progress through detailed reporting tools.

**Highlights:** Interactive Christmas books, Multiple reading levels, Sing-along Christmas songs, Educational train game, User recording of books, Progress tracking for parents, Built-in audio dictionary

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Arithmetic HD free?

Arithmetic HD costs $1.99, with no in-app purchases.

### Is Reading Train Christmas free?

Reading Train Christmas is free to download, with no in-app purchases.

### Do Arithmetic HD or Reading Train Christmas have ads?

Neither Arithmetic HD nor Reading Train Christmas shows ads.

### Which is updated more often, Arithmetic HD or Reading Train Christmas?

Arithmetic HD ships an update every 9 months, and Reading Train Christmas every 32 months. Most recently, Arithmetic HD was updated on November 6, 2026 and Reading Train Christmas on November 2, 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.*