# King vs KMK Optometry Coaching

The clearest difference is in-app purchases: KMK Optometry Coaching at none against King's 1. KMK Optometry Coaching also leads on update cadence (weekly vs every 2 months) and ratings volume (34 vs 2). King's advantage is iOS requirement (12.0 vs 17.0). On price, rating, ads and monetization model there is nothing between them.

Both are free to download. King sells 1 in-app purchase, starting at $7.99 per month. KMK Optometry Coaching asks for nothing beyond the download.

King holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: KMK Optometry Coaching has 34 ratings behind it against 2, so its average is the more settled of the two.

King ships an update every 2 months, KMK Optometry Coaching weekly. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | King | KMK Optometry Coaching |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/king-devick-migraine-headache/id1359829374/reviews)** | [4.8 (34 ratings)](https://appshunter.io/ios/app/kmk-optometry-coaching/id1645627925/reviews) |
| Number of ratings | 2 | **34** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 220 MB | 129 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 12+ | 9+ |
| Developer | [King-Devick Test, LLC](https://appshunter.io/developer/424793545) | [KMK Optometry](https://appshunter.io/developer/1645627929) |

## What reviewers say

### King

[App page](https://appshunter.io/ios/app/king-devick-migraine-headache/id1359829374)

This app helps individuals with a history of migraines detect the early prodrome phase before a headache begins. It uses a guided eye movement test with automated speech recognition to analyze performance and compare it to past results, potentially aiding in timely treatment.

**Highlights:** Migraine prodrome detection, Saccadic eye movement test, Automated speech recognition analysis, Comparison to historical test data, Guided test administration, Early intervention support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Subscription | $7.99 | per month |


### KMK Optometry Coaching

[App page](https://appshunter.io/ios/app/kmk-optometry-coaching/id1645627925)

This platform connects optometry students preparing for board exam retakes with a supportive community. It offers live feeds, collaborative spaces, and expert coaching sessions to enhance learning and motivation.

**Highlights:** Live feed with quiz questions and learning tips, Collaborative learning spaces, Direct chat with colleagues and coaches, Live streaming expert coaching events, Community support for board exam retakes

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is King free?

King is free to download, with in-app purchases available.

### Is KMK Optometry Coaching free?

KMK Optometry Coaching is free to download, with no in-app purchases.

### Which has better reviews, King or KMK Optometry Coaching?

King is rated higher. King averages 5.0 out of 5 from 2 ratings, while KMK Optometry Coaching averages 4.8 from 34 ratings.

### Do King or KMK Optometry Coaching have ads?

Neither King nor KMK Optometry Coaching shows ads.

### Which is updated more often, King or KMK Optometry Coaching?

King ships an update every 2 months, and KMK Optometry Coaching weekly. Most recently, King was updated on October 13, 2026 and KMK Optometry Coaching on October 25, 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.*