# eye vs Progressive Identifier for ECP

The clearest difference is rating: Progressive Identifier for ECP at 4.4 against eye's 2.0. Progressive Identifier for ECP also leads on ratings volume (36 vs 5). eye's advantage is in-app purchases (none vs 2) and update cadence (every 2 months vs every 14 months). On price, ads and device support there is nothing between them.

Both are free to download. Progressive Identifier for ECP sells 2 in-app purchases, starting at $4.99 per month. eye asks for nothing beyond the download.

Progressive Identifier for ECP holds the better App Store score, 4.4 against 2.0. That said, the two scores are not equally well evidenced: Progressive Identifier for ECP has 36 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 20% of eye's written reviews are positive against 0% of Progressive Identifier for ECP's, so the app with the better star average is not the one people write more warmly about.

eye ships an update every 2 months, Progressive Identifier for ECP every 14 months. The most recent releases landed on September 8, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | eye | Progressive Identifier for ECP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (5 ratings)](https://appshunter.io/ios/app/eye-ruler-2/id1248865139/reviews) | **[4.4 (36 ratings)](https://appshunter.io/ios/app/progressive-identifier-for-ecp/id1365601702/reviews)** |
| Number of ratings | 5 | **36** |
| Positive reviews | **20.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 14 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 387 MB | 20 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Activisu Solutions](https://appshunter.io/developer/631161101) | [Lens Shapers](https://appshunter.io/developer/1279463389) |

## What reviewers say

### eye

[App page](https://appshunter.io/ios/app/eye-ruler-2/id1248865139)

This iPad application assists eye care professionals in taking precise fitting parameters for personalized lenses. It requires a specific kit from Essilor to function, enabling measurements like far PD, height, and vertex distance.

**Highlights:** Measure Far Pd, Measure Height, Measure Wrap Angle, Measure Pantoscopic Angle, Measure Vertex, Measure Reading Distance

**Features:** Vision Pro support

**In-app purchases:** none


### Progressive Identifier for ECP

[App page](https://appshunter.io/ios/app/progressive-identifier-for-ecp/id1365601702)

This app helps identify progressive lenses by their engravings or names. It provides detailed information on over 1200 lenses, including availability, materials, and fitting heights. Search visually or by text for engravings and lens details.

**Highlights:** Identify lenses by engraving or name, Detailed lens information (materials, fitting height), Search engravings visually or by text, Over 1200 lenses and engravings, Data for USA, Canada, Germany, UK, Includes digital, therapeutic, and anti-fatigue lenses

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $49.99 | per year |


## Frequently asked questions

### Is eye free?

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

### Is Progressive Identifier for ECP free?

Progressive Identifier for ECP is free to download, with in-app purchases available.

### Which has better reviews, eye or Progressive Identifier for ECP?

Progressive Identifier for ECP is rated higher. eye averages 2.0 out of 5 from 5 ratings, while Progressive Identifier for ECP averages 4.4 from 36 ratings.

### Do eye or Progressive Identifier for ECP have ads?

Neither eye nor Progressive Identifier for ECP shows ads.

### Which is updated more often, eye or Progressive Identifier for ECP?

eye ships an update every 2 months, and Progressive Identifier for ECP every 14 months. Most recently, eye was updated on September 8, 2026 and Progressive Identifier for ECP on September 13, 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.*