# Progressive Identifier for ECP vs VisuDoc

The clearest difference is in-app purchases: VisuDoc at none against Progressive Identifier for ECP's 2. VisuDoc also leads on update cadence (every 2 months vs every 14 months) and iOS requirement (13.0 vs 18.0). 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. VisuDoc asks for nothing beyond the download.

Progressive Identifier for ECP ships an update every 14 months, VisuDoc every 2 months. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Progressive Identifier for ECP | VisuDoc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (36 ratings)](https://appshunter.io/ios/app/progressive-identifier-for-ecp/id1365601702/reviews)** | — |
| Number of ratings | **36** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 169 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lens Shapers](https://appshunter.io/developer/1279463389) | [VisuScience Meditech Co., Ltd.](https://appshunter.io/developer/1560274516) |

## What reviewers say

### 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 |


### VisuDoc

[App page](https://appshunter.io/ios/app/visudoc/id1607945289)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Progressive Identifier for ECP free?

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

### Is VisuDoc free?

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

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

Neither Progressive Identifier for ECP nor VisuDoc shows ads.

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

Progressive Identifier for ECP ships an update every 14 months, and VisuDoc every 2 months. Most recently, Progressive Identifier for ECP was updated on October 1, 2026 and VisuDoc on October 12, 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.*