A free program for Android, by VD.

Offline Chemistry Dictionary is a free app for Android devices that provides you with a quick and easy way to look up the definitions and terms used in chemistry and physics. You can use the app without having to connect to the Internet, which makes it great for those who are on the go. It’s easy to search, so you won’t have to spend time reading through pages of text.

The app contains more than 150,000 definitions and terms, which means you’ll be able to find exactly what you’re looking for. 

The app is very easy to use. Just tap on the word you want to look up, and you’ll see all the information you need.