# DANB CDA Test Prep vs DANB RHS Exam by Rocket Prep

The clearest difference is update cadence: DANB CDA Test Prep at every 3 weeks against DANB RHS Exam by Rocket Prep's every 3 months. DANB RHS Exam by Rocket Prep's advantage is iOS requirement (15.1 vs 17.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. DANB CDA Test Prep sells 2 in-app purchases, starting at $9.99 per month and DANB RHS Exam by Rocket Prep sells 8 in-app purchases, starting at $11.99 per 7 days. Whichever you choose, the download price is not the number that matters.

DANB CDA Test Prep ships an update every 3 weeks, DANB RHS Exam by Rocket Prep every 3 months. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | DANB CDA Test Prep | DANB RHS Exam by Rocket Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (8 ratings)](https://appshunter.io/ios/app/danb-rhs-exam-by-rocket-prep/id6751879893/reviews)** |
| Number of ratings | — | **8** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | — | Free with in-app purchases |
| Size | 9 MB | 49 MB |
| Requires iOS | 17.2 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Cargo Teleport Inc](https://appshunter.io/developer/1761832181) | [Darya Pyzhyk](https://appshunter.io/developer/1799009188) |

## What reviewers say

### DANB CDA Test Prep

[App page](https://appshunter.io/ios/app/danb-cda-test-prep/id6738899542)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly subscription | $9.99 | per month |
| Lifetime version | $24.99 | one-time |


### DANB RHS Exam by Rocket Prep

[App page](https://appshunter.io/ios/app/danb-rhs-exam-by-rocket-prep/id6751879893)

Prepare for the Radiation Health & Safety (RHS) certification exam with this comprehensive study tool. It offers extensive question banks, detailed explanations, customizable study modes, and progress tracking to help dental assistants master radiographic practices and advance their careers.

**Highlights:** Extensive question bank, Detailed explanations and references, Customizable study modes, Progress tracking and analytics, Expert-led review resources, Active learning tools, Offline access

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RHS Weekly Full Access | $11.99 | per 7 days |
| RHS Monthly Full Access | $27.99 | per month |
| RHS Monthly Full Access | $27.99 | per month |
| RHS Quarterly Full Access | $49.99 | per 3 months |
| RHS Quarterly Full Access | $49.99 | per 3 months |
| DANB_RHS_mock_tries_1 | $4.99 | one-time |
| DANB_RHS_mock_tries_3 | $9.99 | one-time |
| DANB_RHS_mock_tries_5 | $14.99 | one-time |


## Frequently asked questions

### Is DANB CDA Test Prep free?

DANB CDA Test Prep is free to download, with in-app purchases available.

### Is DANB RHS Exam by Rocket Prep free?

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

### Do DANB CDA Test Prep or DANB RHS Exam by Rocket Prep have ads?

Neither DANB CDA Test Prep nor DANB RHS Exam by Rocket Prep shows ads.

### Which is updated more often, DANB CDA Test Prep or DANB RHS Exam by Rocket Prep?

DANB CDA Test Prep ships an update every 3 weeks, and DANB RHS Exam by Rocket Prep every 3 months. Most recently, DANB CDA Test Prep was updated on October 16, 2026 and DANB RHS Exam by Rocket 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.*