# RIDS calc — Refractive Index Dry Substance

> Calculates properties of air, water, seawater, and sugars using published formulations. (iPhone/iPad app by Wayne Henderson.)

- Source: https://appshunter.io/ios/app/rids-calc/id1513200801 (this page in markdown: same URL + `.md`)
- Developer: [Wayne Henderson](https://appshunter.io/developer/1265636597)
- Category: Reference, Business
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 11 MB
- Languages: English
- Released: 2020-06-21
- Data updated: 2026-06-22
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/rids-calc/id1513200801/reviews.md

## What is RIDS calc?

RIDS simplifies the accurate calculation of several properties of Air, Water, Seawater, and Sugars of various composition. A typical use of RIDS is to calculate the solids level and density of a corn syrup from the refractive index.

RIDS employs detailed, published formulations that cover a wide range of conditions while maintaining state-of-the-art accuracy over that range.

Detailed air properties and expanded water properties by IF97 international standard

## Key features

- 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


## Frequently asked questions about RIDS calc

### What is RIDS calc used for?

RIDS calc is used to accurately calculate properties of air, water, seawater, and sugars. It's particularly useful for determining the solids level and density of corn syrup from its refractive index.

### What kind of formulations does RIDS calc use?

RIDS calc employs detailed, published formulations that are state-of-the-art. These formulations cover a wide range of conditions while maintaining high accuracy.

### Does RIDS calc have ads?

No, RIDS calc does not contain advertisements. It is a completely ad-free application.

### What devices is RIDS calc available on?

RIDS calc is available for iPhone and iPod devices. It is designed for iOS users.

### How often is RIDS calc updated?

The latest version of RIDS calc is 1.4, last updated on June 20, 2025. Updates aim to maintain accuracy and functionality.

### What is the age rating for RIDS calc?

RIDS calc has an age rating of 4+. This indicates it is suitable for users of all ages.

### What specific properties can RIDS calc calculate?

RIDS calc can calculate properties for air, water, seawater, and sugars. It also provides detailed air properties and expanded water properties based on the IF97 international standard.

### What is the user rating for RIDS calc?

RIDS calc has a perfect rating of 5.0 stars based on one review, indicating high user satisfaction.

## Version history (last 5 releases)

### 1.4 — 2025-06-20

minor maintenance and update

### 1.3 — 2022-02-07

• NEW expanded water properties by IF97 calculations
• minor fixes and display improvements

### 1.2 — 2020-10-17

•  iOS 14 compatibility
•  More flexible choice of RI and density references, eg. versus vacuo or vs. air.
•  Now accepts carbon dioxide level as an input for computing air properties.
•  Extensive verification versus published sources.

### 1.1 — 2020-06-23

• Bug fixed that affected the display of Air properties
• Bug fixed that affected the first-run default pressure
• Added more screen shots for 5.5" screens
• Removed need for background app refresh entitlement
• Removed placeholder entries in Settings

### 1.0 — 2020-06-21

No release notes.

## More apps by Wayne Henderson

- [AirCompare™](https://appshunter.io/ios/app/aircompare/id1265636598)

All apps by Wayne Henderson: https://appshunter.io/developer/1265636597

## Related topics

[langelier saturation index](https://appshunter.io/ios/topics/langelier-saturation-index)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-22.*