Originally Posted by Blossom
I like to backup previous version before upgrading in case the new version is unstable. To do that you can use ES File Manager or Astro File Manager. I use ES File Manager. You use the app manager option to back up the app into an apk which is like a exe setup file. You can store the apk files on your PC or something like Dropbox.
To me, apps are toys. I only get the free ones and will never buy an app. I never bother with backups. If an app proves to be unstable, I'll stop using it until it's fixed. In the meantime, I'll just find another free one to replace it.