# InstantCert CLEP vs Peterson's Test Prep

The clearest difference is review sentiment: Peterson's Test Prep at 61% against InstantCert CLEP's 11%. Peterson's Test Prep also leads on rating (4.5 vs 1.0) and monetization model (free with in-app purchases vs subscription). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. InstantCert CLEP sells 1 in-app purchase, starting at $19.99 per month and Peterson's Test Prep sells 3 in-app purchases, starting at $58.99 per month. Whichever you choose, the download price is not the number that matters.

Peterson's Test Prep holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: Peterson's Test Prep has 333 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 11% of InstantCert CLEP's written reviews are positive against 61% of Peterson's Test Prep's.

InstantCert CLEP ships an update every 6 months, Peterson's Test Prep every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | InstantCert CLEP | Peterson's Test Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/instantcert-clep/id1238759723/reviews) | **[4.5 (333 ratings)](https://appshunter.io/ios/app/petersons-test-prep/id1547771930/reviews)** |
| Number of ratings | 1 | **333** |
| Positive reviews | 11.1% of reviews | **61.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 38 MB | 29 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [InstantCert.com, LLC](https://appshunter.io/developer/465309084) | [Peterson's, LLC](https://appshunter.io/developer/1468090485) |

## What reviewers say

### InstantCert CLEP

[App page](https://appshunter.io/ios/app/instantcert-clep/id1238759723)

Prepare for college credit exams like CLEP and DSST with smart flashcards and progress tracking. Study over 60 subjects on your phone and connect with a community of learners. Earn college credit faster and save on tuition.

**Highlights:** Smart flashcards for memorization, Covers CLEP, DSST & TECEP subjects, Mobile study anywhere, Progress tracking, Community support, Over 60 exam subjects

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access (1 Month) | $19.99 | per month |


### Peterson's Test Prep

[App page](https://appshunter.io/ios/app/petersons-test-prep/id1547771930)

Prepare for standardized tests to achieve your educational and career goals. Access a vast library of courses and practice materials for college entrance, military, and professional certifications. Syncs seamlessly with a web platform for flexible learning.

**Highlights:** Diagnostic tests, Practice exams, Interactive lessons, Flashcards, Expert strategies, Web-based access, Cross-platform syncing

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month | $58.99 | per month |
| 3 months | $134.99 | per 3 months |
| 6 months | $234.99 | per 6 months |

**What reviewers like**

- 👍 Great for ACT/SAT prep
- 👍 Excellent ASVAB prep
- 👍 Good for DSST exams
- 👍 Helpful for CLEP exams
- 👍 Useful for HSPT test prep

**What reviewers complain about**

- 😞 Outdated DSST material
- 😞 DSST content not representative
- 😞 Practice exams don't cover instructional material
- 😞 Expensive subscription prices
- 😞 App is slow to load

**Reported bugs**

- Practice tests won't load
- App keeps closing when opening practice exams
- Flashcards and study material are blank
- Videos don't load properly
- App intermittently freezes

**Requested features**

- Ability to revisit test questions and answers for review
- More comprehensive DSST study material
- Update outdated content
- Fix drag-and-drop functionality on mobile
- Improve customer service responsiveness


## Frequently asked questions

### Is InstantCert CLEP free?

InstantCert CLEP is free to download, with in-app purchases available.

### Is Peterson's Test Prep free?

Peterson's Test Prep is free to download, with in-app purchases available.

### Which has better reviews, InstantCert CLEP or Peterson's Test Prep?

Peterson's Test Prep is rated higher. InstantCert CLEP averages 1.0 out of 5 from 1 ratings, while Peterson's Test Prep averages 4.5 from 333 ratings.

### Do InstantCert CLEP or Peterson's Test Prep have ads?

Neither InstantCert CLEP nor Peterson's Test Prep shows ads.

### Which is updated more often, InstantCert CLEP or Peterson's Test Prep?

InstantCert CLEP ships an update every 6 months, and Peterson's Test Prep every 2 months. Most recently, InstantCert CLEP was updated on October 24, 2026 and Peterson's Test Prep on October 24, 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.*