Some say it is not necessary, that there are fewer viruses attacking android but with around 50% of web traffic now on phones & tablets don’t you think the scamming b@st##ds who create viruses will be looking to target Android?
First of all I would say keep all your apps and your phones operating system up-to-date
Now here are some links to Antivirus providers
or just search for antivirus on the Google Play Store
Some of the above include ‘cleaning’ software to clear caches and stop apps running in the background, slowing down your phone and using the battery – but I use Clean Master and CCleaner but there are many to choose from – again just search on Google Play
Hope you find this of use, be safe and enjoy
Before I bought my cheap Chinaphone las year I already knew that some came with built in Malware.Unfortunately Amazon who I bought it off still don't check a lof of the phones they let some Vendors sell.
As I'm used to modding Android phones I eventually found a couple of better,"Custom Roms" for the phone and defeated the Malware which would cause unwanted Ads and games downloads.
The only Anti-Malware/Anti-virus that found the deep rooted stuff was,"ESET",
But another decent free one is Sophos,