# Optical Calculator for ECPs vs Ncontroller

The clearest difference is in-app purchases: Ncontroller at none against Optical Calculator for ECPs's 2. Ncontroller also leads on iOS requirement (12.0 vs 18.0). Optical Calculator for ECPs's advantage is update cadence (every 6 weeks vs every 36 months). On price, ads and device support there is nothing between them.

Both are free to download. Optical Calculator for ECPs sells 2 in-app purchases, starting at $4.99 per month. Ncontroller asks for nothing beyond the download.

Optical Calculator for ECPs ships an update every 6 weeks, Ncontroller every 36 months. The most recent releases landed on September 22, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Optical Calculator for ECPs | Ncontroller |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (27 ratings)](https://appshunter.io/ios/app/optical-calculator-for-ecps/id1146297178/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 36 months |
| Monetization | Freemium | — |
| Size | 11 MB | 12 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 17+ |
| Developer | [Lens Shapers](https://appshunter.io/developer/1279463389) | [NIDEK](https://appshunter.io/developer/1434264984) |

## What reviewers say

### Optical Calculator for ECPs

[App page](https://appshunter.io/ios/app/optical-calculator-for-ecps/id1146297178)

This medical app provides a suite of specialized optical calculation tools for eye care professionals. It offers features like lens thickness, vertex compensation, and prism compounding, with a focus on accuracy and ease of use. A subscription unlocks all current and future calculators.

**Highlights:** Stock Lens Cutout, Lens Thickness Calculation, Vertex Compensation, Rx Transpose, Prism Compounding, Contact Lens Rx, Tilt & Wrap Compensation

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

**In-app purchases (2)**

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


### Ncontroller

[App page](https://appshunter.io/ios/app/ncontroller/id1434264985)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Optical Calculator for ECPs free?

Optical Calculator for ECPs is free to download, with in-app purchases available.

### Is Ncontroller free?

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

### Do Optical Calculator for ECPs or Ncontroller have ads?

Neither Optical Calculator for ECPs nor Ncontroller shows ads.

### Which is updated more often, Optical Calculator for ECPs or Ncontroller?

Optical Calculator for ECPs ships an update every 6 weeks, and Ncontroller every 36 months. Most recently, Optical Calculator for ECPs was updated on September 22, 2026 and Ncontroller on September 24, 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.*