# Optical Dispensing Assistant 2 vs Cataract Lens

The clearest difference is in-app purchases: Cataract Lens at none against Optical Dispensing Assistant 2's 8. Cataract Lens also leads on device support (3 vs 1) and iOS requirement (12.0 vs 15.4). On price, update cadence and ads there is nothing between them.

Both are free to download. Optical Dispensing Assistant 2 sells 8 in-app purchases, starting at $21.49 per month. Cataract Lens asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Optical Dispensing Assistant 2 | Cataract Lens |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/optical-dispensing-assistant-2/id827660005/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 15 MB | 46 MB |
| Requires iOS | 15.4 | **12.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Optical Directions Consulting](https://appshunter.io/developer/309309098) | [Chun-Huei Liu](https://appshunter.io/developer/1657411874) |

## What reviewers say

### Optical Dispensing Assistant 2

[App page](https://appshunter.io/ios/app/optical-dispensing-assistant-2/id827660005)

This app provides precise progressive lens measurements using an iPad, eliminating the need for traditional marking dots. It offers advanced features like multi-posture PD measurements, frame selection assistance, and detailed optical data for accurate lens fitting. It's a cost-effective solution for opticians seeking advanced technology.

**Highlights:** Accurate monocular PD measurements in multiple postures, Electronic mirror for frame selection, Marketing tool for sharing client choices, Measures pantoscopic tilt and vertex distance, Supports high-wrap frames, Automatic face and eye detection, Print and email job results

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $21.49 | per month |
| 6 Month Subscription | $120.99 | per 6 months |
| Yearly Subscription | $214.99 | per year |
| 5 Measurements | $4.99 | one-time |
| 20 Measurements | $14.99 | one-time |
| 100 Measurements | $49.99 | one-time |
| Optical Dispensing Assistant 1 Upgrade | $149.00 | one-time |
| 500 measurements (recommended) | $159.00 | one-time |


### Cataract Lens

[App page](https://appshunter.io/ios/app/cataract-lens/id6447101876)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Optical Dispensing Assistant 2 free?

Optical Dispensing Assistant 2 is free to download, with in-app purchases available.

### Is Cataract Lens free?

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

### Do Optical Dispensing Assistant 2 or Cataract Lens have ads?

Neither Optical Dispensing Assistant 2 nor Cataract Lens shows ads.

### Which is updated more often, Optical Dispensing Assistant 2 or Cataract Lens?

Optical Dispensing Assistant 2 ships an update every 2 months, and Cataract Lens every 2 months. Most recently, Optical Dispensing Assistant 2 was updated on November 6, 2026 and Cataract Lens on November 7, 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.*