# ZRefractive vs COA & COT Ophthalmology Prep

The clearest difference is price: ZRefractive at Free against COA & COT Ophthalmology Prep's $19.99. ZRefractive also leads on rating (5.0 vs 1.0) and ratings volume (5 vs 1). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

ZRefractive is free to download; COA & COT Ophthalmology Prep costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ZRefractive holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: ZRefractive has 5 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | ZRefractive | COA & COT Ophthalmology Prep |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/zrefractive/id1391502868/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/coa-and-cot-ophthalmology-prep/id6742322432/reviews) |
| Number of ratings | **5** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | — |
| Monetization | **Free** | Paid |
| Size | 114 MB | 61 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [BigTinCan Mobile Pty. Ltd.](https://appshunter.io/developer/1057042058) | [OVERTECHS](https://appshunter.io/developer/948668941) |

## What reviewers say

### ZRefractive

[App page](https://appshunter.io/ios/app/zrefractive/id1391502868)

This app provides educational and marketing content related to ZEISS refractive procedures for customers. Healthcare professionals can use it to inform patients directly from digital devices, share content, and connect with their practice development team.

**Highlights:** ZEISS refractive content access, Patient education tools, Digital content sharing, Email content option, Contact practice development team

**Features:** macOS Compatibility

**In-app purchases:** none


### COA & COT Ophthalmology Prep

[App page](https://appshunter.io/ios/app/coa-and-cot-ophthalmology-prep/id6742322432)

Prepare for ophthalmic certification exams with this comprehensive study tool. It offers targeted resources, realistic practice questions, and proven strategies for COA, COT, OSC, and COMT certifications. All features are accessible without subscriptions or in-app purchases.

**Highlights:** Specialized certification tracks (COA, COT, OSC, COMT), Comprehensive content aligned with exam blueprints, Scenario-based learning and case studies, Extensive exam-style practice questions, Simulated timed practice exams, Detailed answer rationales, Interactive study tools like flashcards and quizzes, Performance tracking and analytics

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ZRefractive free?

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

### Is COA & COT Ophthalmology Prep free?

COA & COT Ophthalmology Prep costs $19.99, with no in-app purchases.

### Which has better reviews, ZRefractive or COA & COT Ophthalmology Prep?

ZRefractive is rated higher. ZRefractive averages 5.0 out of 5 from 5 ratings, while COA & COT Ophthalmology Prep averages 1.0 from 1 ratings.

### Do ZRefractive or COA & COT Ophthalmology Prep have ads?

Neither ZRefractive nor COA & COT Ophthalmology Prep 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.*