# Ross Optical Calculator vs LensDataBase

The clearest difference is update cadence: LensDataBase at weekly against Ross Optical Calculator's every 6 weeks. Ross Optical Calculator's advantage is iOS requirement (12.4 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ross Optical Calculator ships an update every 6 weeks, LensDataBase weekly. The most recent releases landed on June 6, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Ross Optical Calculator | LensDataBase |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ross-optical-calculator/id1377878551/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 12 MB | 7 MB |
| Requires iOS | **12.4** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ross Optical](https://appshunter.io/developer/1377878550) | [Evgenii Skvortsov](https://appshunter.io/developer/1719877397) |

## What reviewers say

### Ross Optical Calculator

[App page](https://appshunter.io/ios/app/ross-optical-calculator/id1377878551)

This utility app provides a comprehensive calculator for a variety of optical equations. It is designed for ease of use, making complex calculations accessible on your mobile device.

**Highlights:** Optical equation calculator, Wide range of equations, Easy to use interface, Mobile accessibility

**Features:** macOS Compatibility

**In-app purchases:** none


### LensDataBase

[App page](https://appshunter.io/ios/app/lensdatabase/id6748017755)

**In-app purchases:** none


## Frequently asked questions

### Is Ross Optical Calculator free?

Ross Optical Calculator is free to download, with no in-app purchases.

### Is LensDataBase free?

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

### Do Ross Optical Calculator or LensDataBase have ads?

Neither Ross Optical Calculator nor LensDataBase shows ads.

### Which is updated more often, Ross Optical Calculator or LensDataBase?

Ross Optical Calculator ships an update every 6 weeks, and LensDataBase weekly. Most recently, Ross Optical Calculator was updated on June 6, 2026 and LensDataBase on September 8, 2026.

---

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