# Arithmetic HD vs Parent Dost

The clearest difference is price: Parent Dost at Free against Arithmetic HD's $1.99. Parent Dost also leads on update cadence (every 2 weeks vs every 9 months). Arithmetic HD's advantage is iOS requirement (12.1 vs 15.3). On ads, in-app purchases and device support there is nothing between them.

Parent Dost 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, Parent Dost every 2 weeks. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Arithmetic HD | Parent Dost |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 weeks** |
| Size | 17 MB | 27 MB |
| Requires iOS | **12.1** | 15.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kostakov Maxim](https://appshunter.io/developer/524964352) | [Acadza](https://appshunter.io/developer/1786609355) |

## What reviewers say

### Arithmetic HD

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Parent Dost

[App page](https://appshunter.io/ios/app/parent-dost/id6739706825)

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

**In-app purchases:** none


## Frequently asked questions

### Is Arithmetic HD free?

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

### Is Parent Dost free?

Parent Dost is free to download, with no in-app purchases.

### Do Arithmetic HD or Parent Dost have ads?

Neither Arithmetic HD nor Parent Dost shows ads.

### Which is updated more often, Arithmetic HD or Parent Dost?

Arithmetic HD ships an update every 9 months, and Parent Dost every 2 weeks. Most recently, Arithmetic HD was updated on October 26, 2026 and Parent Dost on October 29, 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.*