# Assalub Oil Viscosity App — Calculate oil viscosity

> Calculate oil viscosity (iPhone/iPad app by Assalub AB.)

- Source: https://appshunter.io/ios/app/assalub-oil-viscosity-app/id6446201875 (this page in markdown: same URL + `.md`)
- Developer: [Assalub AB](https://appshunter.io/developer/1676622489)
- Category: Utilities, Productivity
- Price: $2.99
- Age rating: 4+
- Requires: iOS 15.1 · 31 MB
- Languages: American English
- Released: 2023-10-10
- Data updated: 2026-08-16
- User reviews in markdown: https://appshunter.io/ios/app/assalub-oil-viscosity-app/id6446201875/reviews.md

## What is Assalub Oil Viscosity App?

This application give you the viscosity for an oil at the temperature you choose. 
This calculation is based on ASTM D341. 

You need the viscosity for the oil at 40 °C (104 °F) and 100 °C (212 °F). Then you give the temperature for which you want the viscosity calculated and the app will show it. 

The Oil Viscosity App generates the result instantly, without having to use the viscosity/temperature diagram which is the usual way of calculating the viscosity at a certain temperature.
 
For example, if you have a gear box where the oil temperature is 85 °C. The oil must have a minimum viscosity of 50 cSt for this type of gear box.  
Now you want to know if your oil is suitable. You check the data sheet for your oil, and find out that the viscosity at 40 °C is 320 cSt and the viscosity at 100 °C is 37 cSt. You put in the numbers in the App and easily get the result: 56.5 cSt at 85 °C.  

Assalub AB is a Swedish company manufacturing equipment for industrial lubrication systems. 
www.assalub.se


## Version history (last 3 releases)

### 1.54.0 — 2026-08-07

Version 1.54.0

Rebuilt on the latest platform version with support for iOS 26.

Updated components and improved stability under the hood.

Viscosity calculations are unchanged. You still get kinematic viscosity at your chosen temperature from the 40 °C and 100 °C values, exactly as before.

### 1.1.0 — 2025-09-02

Modernization and upgrade of the technical platform for the latest iOS, performance and stability improvements, bug fixes, and visual adjustments.

### 1.0 — 2023-10-10

No release notes.

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## More apps by Assalub AB

- [Assalub Grease Doser App](https://appshunter.io/ios/app/assalub-grease-doser-app/id6446201920)

All apps by Assalub AB: https://appshunter.io/developer/1676622489

## Related topics

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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 2026-08-16.*