Posted 29 November 2012 - 09:30 PM
Probably not a virus. But could be a bad sector or something.
Do you still have it backed up to hard drive? That's a good idea, you know. So is using a program like Dropbox to have it on the phone and another machine at the same time.
I had an app that kept disappearing more than a year ago. But I think Google was "protecting" me. It disappeared from the app store at about the same time, too. But I had a copy of the apk backed up, so I reinstalled it. They (or something) removed it again, and I installed it again. After a number of reinstalls, it stopped disappearing. I still have it on the phone and on the tablet. And no problems with it at all.
Viruses as such aren't really a problem on Android. Yes, there have been a few cases of bad apps acquired through the app store. But every one of them was removed within 15 minutes of Google finding out they were problematic. Then they took steps to remove them from users' devices. (Maybe they thought the app that kept disappearing was one of those. But I scanned it and have used it across 6 devices without any problems at all, including no private information leaked. I think they were mistaken, but it's still not in the app store.)