# NthApp vs Ross Optical Calculator

The clearest difference is ratings volume: Ross Optical Calculator at 3 against NthApp's 1. Ross Optical Calculator also leads on iOS requirement (12.4 vs 26.6). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for NthApp against 5.0 for Ross Optical Calculator. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

NthApp ships an update every 2 months, Ross Optical Calculator every 6 weeks. The most recent releases landed on October 29, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | NthApp | Ross Optical Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/nthapp/id590208686/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/ross-optical-calculator/id1377878551/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 9 MB | 12 MB |
| Requires iOS | 26.6 | **12.4** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [LucoTrav Software, Inc](https://appshunter.io/developer/382506701) | [Ross Optical](https://appshunter.io/developer/1377878550) |

## What reviewers say

### NthApp

[App page](https://appshunter.io/ios/app/nthapp/id590208686)

Customize your browsing experience by configuring the app's main screen with your own web or server-based content. Create and save multiple display configurations for quick access and share them with others via email. Supports web, portfolio, list, and contact views.

**Highlights:** Create custom display configurations, Add web, portfolio, list, and contact views, Save and quickly select configurations, Share configurations via email, Import configurations on iPhone and iPad, Central scratchpad for batch copy/paste

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is NthApp free?

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

### Is Ross Optical Calculator free?

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

### Which has better reviews, NthApp or Ross Optical Calculator?

NthApp and Ross Optical Calculator are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

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

Neither NthApp nor Ross Optical Calculator shows ads.

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

NthApp ships an update every 2 months, and Ross Optical Calculator every 6 weeks. Most recently, NthApp was updated on October 29, 2026 and Ross Optical Calculator on October 11, 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.*