# Arithmatrix vs CLEP Natural Science Test Prep

The clearest difference is in-app purchases: Arithmatrix at none against CLEP Natural Science Test Prep's 9. Arithmatrix also leads on update cadence (monthly vs every 16 months) and iOS requirement (11.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. CLEP Natural Science Test Prep sells 9 in-app purchases, starting at $8.99 per 7 days. Arithmatrix asks for nothing beyond the download.

Arithmatrix ships an update monthly, CLEP Natural Science Test Prep every 16 months. The most recent releases landed on September 11, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Arithmatrix | CLEP Natural Science Test Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 16 months |
| Size | 57 MB | 53 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ezana Dawit](https://appshunter.io/developer/1665718578) | [YAUHEN BAHDANOVICH](https://appshunter.io/developer/1711932790) |

## What reviewers say

### Arithmatrix

[App page](https://appshunter.io/ios/app/arithmatrix-brain-training/id1665718576)

**Features:** macOS Compatibility

**In-app purchases:** none


### CLEP Natural Science Test Prep

[App page](https://appshunter.io/ios/app/clep-natural-science-test-prep/id6741392610)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sciences Weekly Full Access | $8.99 | per 7 days |
| Sciences Monthly Full Access | $24.99 | per month |
| Science Monthly Full Access | $34.99 | per month |
| Science Quarterly Full Access | $55.99 | per 3 months |
| Science Quarterly Full Access | $59.99 | per 3 months |
| Science Semiannual Full Access | $75.99 | per 6 months |
| Science Semiannual Full Access | $79.99 | per 6 months |
| Science Annual Full Access | $109.99 | per year |
| Science Annual Full Access | $119.99 | per year |


## Frequently asked questions

### Is Arithmatrix free?

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

### Is CLEP Natural Science Test Prep free?

CLEP Natural Science Test Prep is free to download, with in-app purchases available.

### Do Arithmatrix or CLEP Natural Science Test Prep have ads?

Neither Arithmatrix nor CLEP Natural Science Test Prep shows ads.

### Which is updated more often, Arithmatrix or CLEP Natural Science Test Prep?

Arithmatrix ships an update monthly, and CLEP Natural Science Test Prep every 16 months. Most recently, Arithmatrix was updated on September 11, 2026 and CLEP Natural Science Test Prep on September 8, 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.*