# AZoOptics vs RIDS calc

The clearest difference is rating: RIDS calc at 5.0 against AZoOptics's 3.0. AZoOptics's advantage is ratings volume (5 vs 1) and iOS requirement (8.0 vs 13.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

RIDS calc holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: AZoOptics has 5 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 10 months. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | AZoOptics | RIDS calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (5 ratings)](https://appshunter.io/ios/app/azooptics/id362496774/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rids-calc/id1513200801/reviews)** |
| Number of ratings | **5** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | Every 10 months |
| Monetization | Free | Free |
| Size | 6 MB | 11 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AZoNetwork](https://appshunter.io/developer/336360747) | [Wayne Henderson](https://appshunter.io/developer/1265636597) |

## What reviewers say

### AZoOptics

[App page](https://appshunter.io/ios/app/azooptics/id362496774)

This app provides a comprehensive resource for optics and photonics, offering news, supplier information, and equipment details. It's designed for professionals, students, and anyone interested in the field, making complex information easily accessible.

**Highlights:** Optics and Photonics news, Supplier directory, Equipment information, Latest industry updates, Easy access to information

**Features:** macOS Compatibility

**In-app purchases:** none


### RIDS calc

[App page](https://appshunter.io/ios/app/rids-calc/id1513200801)

This app accurately calculates properties for air, water, seawater, and sugars. It uses detailed, published formulations for precise results across various conditions, including solids level and density of corn syrup.

**Highlights:** Accurate property calculations, Supports air, water, seawater, and sugars, Calculates solids level and density, Uses detailed published formulations, State-of-the-art accuracy, Includes detailed air and expanded water properties

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AZoOptics free?

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

### Is RIDS calc free?

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

### Which has better reviews, AZoOptics or RIDS calc?

RIDS calc is rated higher. AZoOptics averages 3.0 out of 5 from 5 ratings, while RIDS calc averages 5.0 from 1 ratings.

### Do AZoOptics or RIDS calc have ads?

Neither AZoOptics nor RIDS calc shows ads.

### Which is updated more often, AZoOptics or RIDS calc?

AZoOptics ships an update every 10 months, and RIDS calc every 10 months. Most recently, AZoOptics was updated on October 14, 2026 and RIDS calc on October 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.*