# Hudson R vs ABO Exam Prep

The clearest difference is in-app purchases: Hudson R at none against ABO Exam Prep's 2. ABO Exam Prep's advantage is update cadence (every 2 months vs every 9 months) and device support (4 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. ABO Exam Prep sells 2 in-app purchases, starting at $8.99 per month. Hudson R asks for nothing beyond the download.

Hudson R ships an update every 9 months, ABO Exam Prep every 2 months. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Hudson R | ABO Exam Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/abo-exam-prep/id6745945565/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | — | Freemium |
| Size | 120 MB | 129 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Hudson R-IX](https://appshunter.io/developer/1769247930) | [Md Tariqul Islam](https://appshunter.io/developer/1789667629) |

## What reviewers say

### Hudson R

[App page](https://appshunter.io/ios/app/hudson-r-ix/id6695762776)

**In-app purchases:** none


### ABO Exam Prep

[App page](https://appshunter.io/ios/app/abo-exam-prep/id6745945565)

Prepare for optician certification exams with over 1,200 practice questions, detailed explanations, and realistic mock exams. Track your progress, study offline, and gain the confidence needed to pass your ABO and NCLE tests.

**Highlights:** 1,200+ practice questions, Detailed explanations, Realistic mock exams, Daily quiz challenges, Performance analytics, Offline study mode

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $8.99 | per month |
| Unlimited Plan | $17.99 | one-time |


## Frequently asked questions

### Is Hudson R free?

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

### Is ABO Exam Prep free?

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

### Do Hudson R or ABO Exam Prep have ads?

Neither Hudson R nor ABO Exam Prep shows ads.

### Which is updated more often, Hudson R or ABO Exam Prep?

Hudson R ships an update every 9 months, and ABO Exam Prep every 2 months. Most recently, Hudson R was updated on November 8, 2026 and ABO Exam Prep on October 30, 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.*