# CLEP Natural Science Test Prep vs Grade 9 Science Practice

The clearest difference is in-app purchases: Grade 9 Science Practice at none against CLEP Natural Science Test Prep's 9. Grade 9 Science Practice also leads on update cadence (every 11 days vs every 16 months) and iOS requirement (13.0 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. Grade 9 Science Practice asks for nothing beyond the download.

CLEP Natural Science Test Prep ships an update every 16 months, Grade 9 Science Practice every 11 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CLEP Natural Science Test Prep | Grade 9 Science Practice |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 11 days** |
| Size | 53 MB | 24 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [YAUHEN BAHDANOVICH](https://appshunter.io/developer/1711932790) | [Manish Kumar](https://appshunter.io/developer/1854995154) |

## What reviewers say

### 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 |


### Grade 9 Science Practice

[App page](https://appshunter.io/ios/app/grade-9-science-practice/id6757635913)

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

**In-app purchases:** none


## Frequently asked questions

### Is CLEP Natural Science Test Prep free?

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

### Is Grade 9 Science Practice free?

Grade 9 Science Practice is free to download, with no in-app purchases.

### Do CLEP Natural Science Test Prep or Grade 9 Science Practice have ads?

Neither CLEP Natural Science Test Prep nor Grade 9 Science Practice shows ads.

### Which is updated more often, CLEP Natural Science Test Prep or Grade 9 Science Practice?

CLEP Natural Science Test Prep ships an update every 16 months, and Grade 9 Science Practice every 11 days. Most recently, CLEP Natural Science Test Prep was updated on November 8, 2026 and Grade 9 Science Practice on October 31, 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.*