I'm new user, can anyone tell me about this application ? if i buy bidefender mobile security, how many device mobile i can use it and can it be work on android and IOS mobile too ?
You can find all the information in the links stated below (but these will be for a single device, in case you need multiple device you will have to buy subscription one by one for each device which may get costlier)
If you want to increase the number of devices, with manageable price, you may have to consider Bitdefender Total Security, whose license you can use on Windows, Mac, Android, and iOS devices. You can check the price according to the number of devices you want to use the product on:
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Bitdefender Ultimate Security Plus (user)