# Eye Chart HD vs MobilEM

The clearest difference is rating: Eye Chart HD at 5.0 against MobilEM's 3.6. Eye Chart HD also leads on iOS requirement (12.0 vs 15.0). MobilEM's advantage is ads (none vs shown) and update cadence (every 2 months vs every 6 months). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Eye Chart HD sells 2 in-app purchases, starting at $2.99 per month and MobilEM sells 12 in-app purchases, starting at $1.99 per year. Whichever you choose, the download price is not the number that matters.

Eye Chart HD holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: MobilEM has 39 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 33% of Eye Chart HD's written reviews are positive against 45% of MobilEM's, so the app with the better star average is not the one people write more warmly about.

Eye Chart HD ships an update every 6 months, MobilEM every 2 months. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Eye Chart HD | MobilEM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/eye-chart-hd/id382019572/reviews)** | [3.6 (39 ratings)](https://appshunter.io/ios/app/mobilem/id1474834329/reviews) |
| Number of ratings | 5 | **39** |
| Positive reviews | 33.3% of reviews | **45.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | — | **#62** |
| Size | 31 MB | 205 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Dok LLC](https://appshunter.io/developer/293163442) | [Emergency Medicine Residents' Association](https://appshunter.io/developer/331670150) |

## What reviewers say

### Eye Chart HD

[App page](https://appshunter.io/ios/app/eye-chart-hd/id382019572)

This app provides a clinically evaluated visual acuity screening tool for various settings. It offers randomized Snellen, Tumbling E, and other charts to help assess vision, especially when traditional charts are unavailable or memorized. Additional features are available through a monthly subscription.

**Highlights:** Randomized Snellen charts, Tumbling E charts, Pocket vision screener, Line randomization, Chart selector, Near vision chart (subscription), Amsler Grid (subscription)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professional Subscription | $2.99 | per month |
| Eye Chart HD Full Version | $0.99 | one-time |


### MobilEM

[App page](https://appshunter.io/ios/app/mobilem/id1474834329)

**Currently charting:** #62 Top Grossing · Medical (US App Store)

Provides fast, evidence-based clinical guidance for emergency medicine professionals. Access updated recommendations on a wide range of topics, including antibiotics, toxicology, and critical care. Offers free content, individual purchases, and an all-access subscription.

**Highlights:** Evidence-based recommendations, Antibiotic and toxicology guidance, EKG and orthopedic injury protocols, Airway and pediatric emergency management, Critical care medication information, Fast navigation and universal search, Bookmarking and note-taking

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ventilator Mgmt. Subscription | $1.99 | per year |
| Pediatric Qwic | $1.99 | per year |
| MobilEm Airway Management | $4.99 | per year |
| Trauma Guide | $4.99 | per year |
| Antibiotic Guide Subscription | $9.99 | per year |
| MobilEm Ortho Guide | $9.99 | per year |
| MobilEM Tox Guide | $9.99 | per year |
| PressorDex | $9.99 | per year |
| EKG Guide Subscription | $9.99 | per year |
| Pain Management | $9.99 | per year |
| PEM Fundamentals Subscription | $9.99 | per year |
| MobilEm All Access Pass | $39.99 | per year |


## Frequently asked questions

### Is Eye Chart HD free?

Eye Chart HD is free to download, with in-app purchases available.

### Is MobilEM free?

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

### Which has better reviews, Eye Chart HD or MobilEM?

Eye Chart HD is rated higher. Eye Chart HD averages 5.0 out of 5 from 5 ratings, while MobilEM averages 3.6 from 39 ratings.

### Do Eye Chart HD or MobilEM have ads?

Eye Chart HD shows ads; MobilEM does not.

### Which is updated more often, Eye Chart HD or MobilEM?

Eye Chart HD ships an update every 6 months, and MobilEM every 2 months. Most recently, Eye Chart HD was updated on October 17, 2026 and MobilEM on October 16, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*