Is it a waste to load two anti-virus apps on your mobile? Are two AV apps more effective than one?
A known issue with running 2 AVs is that they'll consider each other as a potential virus.
This has to do with the behaviour of these programs. They scan directories, perform root-operations (if you have installed the AV on a rooted device), and so on.
This is true on any system, not only mobile devices.
You can in most cases run an AV together with an anti-malware product.
I do say in most cases.
As mentioned by Karan, there is no real need for AV software as long as you only run Google Play / Appstore apps and you don't download any rubbish from sites you visit.
Do keep in mind that there are some dangerous apps on Google Play. I'm an Android user myself, definitly no iFanboy, and I must admit not all Play apps are safe.
So always check the permissions and intentions of an app before installing it.
I myself have Avast! Mobile Security on my tablet.
This is because I run some off-the-market apps. MS also allows me to protect some apps with a pincode, such as my email apps.
I don't think running an AV is a waste of resources, but if you handle your device with care, there is no real need for one.
If you don't use much of sharing stuffs from unreliable/unknown sources and you do not visit unknown sites.
Answer is NO, you don't need a AV.
Its a waste of resources.
Q. Is it a waste to load two anti-virus apps on your mobile? Are two AV apps more effective than one?
YES it is a waste. NO two apps are not effective.
Reason is each AV has it its own heuristic engines to scan viruses, which generally detects another AV as a virus.