# PMI PMP Exam Prep by Rocket vs ISB

The clearest difference is in-app purchases: ISB at none against PMI PMP Exam Prep by Rocket's 6. ISB also leads on update cadence (every 2 weeks vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PMI PMP Exam Prep by Rocket sells 6 in-app purchases, starting at $9.99 per 7 days. ISB asks for nothing beyond the download.

PMI PMP Exam Prep by Rocket ships an update every 7 months, ISB every 2 weeks. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | PMI PMP Exam Prep by Rocket | ISB |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Size | 39 MB | 53 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Darya Pyzhyk](https://appshunter.io/developer/1799009188) | [Indian School of Business](https://appshunter.io/developer/884930546) |

## What reviewers say

### PMI PMP Exam Prep by Rocket

[App page](https://appshunter.io/ios/app/pmi-pmp-exam-prep-by-rocket/id6744415297)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PMP Weekly Full Access | $9.99 | per 7 days |
| PMP Monthly Full Access | $27.99 | per month |
| PMP Monthly Full Access | $27.99 | per month |
| PMI_PMP_mock_tries_1 | $4.99 | one-time |
| PMI_PMP_mock_tries_3 | $9.99 | one-time |
| PMI_PMP_mock_tries_5 | $14.99 | one-time |


### ISB

[App page](https://appshunter.io/ios/app/isb-learning-app/id6760743087)

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

**In-app purchases:** none


## Frequently asked questions

### Is PMI PMP Exam Prep by Rocket free?

PMI PMP Exam Prep by Rocket is free to download, with in-app purchases available.

### Is ISB free?

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

### Do PMI PMP Exam Prep by Rocket or ISB have ads?

Neither PMI PMP Exam Prep by Rocket nor ISB shows ads.

### Which is updated more often, PMI PMP Exam Prep by Rocket or ISB?

PMI PMP Exam Prep by Rocket ships an update every 7 months, and ISB every 2 weeks. Most recently, PMI PMP Exam Prep by Rocket was updated on October 30, 2026 and ISB on November 5, 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.*