# OSRA vs NBDE Exam Prep

The clearest difference is in-app purchases: OSRA at none against NBDE Exam Prep's 5. OSRA also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.1). NBDE Exam Prep's advantage is update cadence (weekly vs every 13 months). On price and device support there is nothing between them.

Both are free to download. NBDE Exam Prep sells 5 in-app purchases, starting at $5.99 per 7 days. OSRA asks for nothing beyond the download.

OSRA ships an update every 13 months, NBDE Exam Prep weekly. The most recent releases landed on September 14, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | OSRA | NBDE Exam Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Weekly** |
| Size | 18 MB | 47 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [QApps](https://appshunter.io/developer/394183069) | [Ilia Chernikov](https://appshunter.io/developer/1818071113) |

## What reviewers say

### OSRA

[App page](https://appshunter.io/ios/app/osra/id6468240039)

**Features:** macOS Compatibility

**In-app purchases:** none


### NBDE Exam Prep

[App page](https://appshunter.io/ios/app/nbde-exam-prep/id6754602164)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $5.99 | per 7 days |
| Month | $9.99 | per month |
| 3 Month | $19.99 | per 3 months |
| 1 Month | $29.99 | per month |
| 3 Month | $59.99 | per 3 months |


## Frequently asked questions

### Is OSRA free?

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

### Is NBDE Exam Prep free?

NBDE Exam Prep is free to download, with in-app purchases available.

### Do OSRA or NBDE Exam Prep have ads?

NBDE Exam Prep shows ads; OSRA does not.

### Which is updated more often, OSRA or NBDE Exam Prep?

OSRA ships an update every 13 months, and NBDE Exam Prep weekly. Most recently, OSRA was updated on September 14, 2026 and NBDE Exam Prep on September 9, 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.*