Some miscellaneous ideas are presented in these apps.
Some of these are Black body radiation, Color - addition and subtraction, principle of Vernier Calipers etc..
Should be of interest to students getting to do basic physics

This app is a part of collection of apps on introductory physics.
The other physics apps can be found on the playstore at
https://play.google.com/store/search?q=pub:Surendranath.B.
Desktop java applets dealing with this content are avialable for free at this website
http://www.surendranath.org (General Physics Java Applets)
Some of these applets have been reviewed on merlot. Please check the following link.
http://www.merlot.org/merlot/viewMaterial.htm?id=90202