# Peterson's Test Prep vs KeysKeep

The clearest difference is review sentiment: KeysKeep at 100% against Peterson's Test Prep's 61%. KeysKeep also leads on rating (5.0 vs 4.5) and in-app purchases (none vs 3). Peterson's Test Prep's advantage is ratings volume (330 vs 3). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Peterson's Test Prep sells 3 in-app purchases, starting at $58.99 per month. KeysKeep asks for nothing beyond the download.

KeysKeep holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Peterson's Test Prep has 330 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 61% of Peterson's Test Prep's written reviews are positive against 100% of KeysKeep's.

Peterson's Test Prep ships an update every 2 months, KeysKeep every 2 weeks. The most recent releases landed on October 15, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Peterson's Test Prep | KeysKeep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (330 ratings)](https://appshunter.io/ios/app/petersons-test-prep/id1547771930/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/keyskeep/id6754389079/reviews)** |
| Number of ratings | **330** | 3 |
| Positive reviews | 61.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 29 MB | 49 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Peterson's, LLC](https://appshunter.io/developer/1468090485) | [Emaginesites, LLC](https://appshunter.io/developer/1848136756) |

## What reviewers say

### 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


### KeysKeep

[App page](https://appshunter.io/ios/app/keyskeep/id6754389079)

This app helps piano students build consistent practice habits through goal setting, smart reminders, and streak tracking. It uses behavioral science principles to make practice engaging and rewarding, visualized through progress tracking and motivational nudges.

**Highlights:** Goal setting and progress tracking, Smart practice reminders, Streak visualization and motivation, Habit formation science, Minimalist dark theme design, Distraction-free typography

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Peterson's Test Prep free?

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

### Is KeysKeep free?

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

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

KeysKeep is rated higher. Peterson's Test Prep averages 4.5 out of 5 from 330 ratings, while KeysKeep averages 5.0 from 3 ratings.

### Do Peterson's Test Prep or KeysKeep have ads?

Neither Peterson's Test Prep nor KeysKeep shows ads.

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

Peterson's Test Prep ships an update every 2 months, and KeysKeep every 2 weeks. Most recently, Peterson's Test Prep was updated on October 15, 2026 and KeysKeep on September 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.*