# Owl Pellet Activities HD vs Arithmetic HD

The clearest difference is price: Owl Pellet Activities HD at Free against Arithmetic HD's $1.99. Arithmetic HD's advantage is device support (3 vs 1). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

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

Owl Pellet Activities HD ships an update every 8 months, Arithmetic HD every 9 months. The most recent releases landed on October 23, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Owl Pellet Activities HD | Arithmetic HD |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/owl-pellet-activities-hd/id413714263/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 9 months |
| Monetization | Free | — |
| Size | 152 MB | 17 MB |
| Requires iOS | **11.0** | 12.1 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Carolina Biological Supply](https://appshunter.io/developer/413708533) | [Kostakov Maxim](https://appshunter.io/developer/524964352) |

## What reviewers say

### Owl Pellet Activities HD

[App page](https://appshunter.io/ios/app/owl-pellet-activities-hd/id413714263)

This educational app aids in the observation and dissection of owl pellets. Users can identify bones, log data into a national database, and view findings from across the country. It also includes bone diagrams, Barn Owl videos, and owl facts.

**Highlights:** Owl pellet dissection observation, Bone identification, Data logging to national database, View national data, Bone diagrams of owl prey, Barn Owl video footage, Owl facts

**Features:** macOS Compatibility

**In-app purchases:** none


### Arithmetic HD

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Owl Pellet Activities HD free?

Owl Pellet Activities HD is free to download, with no in-app purchases.

### Is Arithmetic HD free?

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

### Do Owl Pellet Activities HD or Arithmetic HD have ads?

Neither Owl Pellet Activities HD nor Arithmetic HD shows ads.

### Which is updated more often, Owl Pellet Activities HD or Arithmetic HD?

Owl Pellet Activities HD ships an update every 8 months, and Arithmetic HD every 9 months. Most recently, Owl Pellet Activities HD was updated on October 23, 2026 and Arithmetic HD on October 26, 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.*