# API 510 Practice Test vs PE4 Exam Pro

API 510 Practice Test and PE4 Exam Pro are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. API 510 Practice Test sells 1 in-app purchase, starting at $7.00 per month and PE4 Exam Pro sells 6 in-app purchases, starting at $39.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | API 510 Practice Test | PE4 Exam Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Size | 3 MB | 16 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ambitionz Apps](https://appshunter.io/developer/1764753535) | [David Reddick](https://appshunter.io/developer/1885919293) |

## What reviewers say

### API 510 Practice Test

[App page](https://appshunter.io/ios/app/api-510-practice-test/id6747852521)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| API 510 Practice Test | $7.00 | per month |


### PE4 Exam Pro

[App page](https://appshunter.io/ios/app/pe4-exam-pro-power-engineer/id6760730125)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PE4A Monthly | $39.99 | per month |
| PE4B Monthly | $39.99 | per month |
| Flashcard Pack 4A | $6.99 | one-time |
| Flashcard Pack 4B | $6.99 | one-time |
| Hazardly Pack 4A | $14.99 | one-time |
| Hazardly Pack 4B | $14.99 | one-time |


## Frequently asked questions

### Is API 510 Practice Test free?

API 510 Practice Test is free to download, with in-app purchases available.

### Is PE4 Exam Pro free?

PE4 Exam Pro is free to download, with in-app purchases available.

### Do API 510 Practice Test or PE4 Exam Pro have ads?

Neither API 510 Practice Test nor PE4 Exam Pro shows ads.

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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.*