So you want to spy on other iPhones or Android devices? Mspy can help. It is a bugging tool that lets you record conversations remotely. You can check call details to find out who has called the phone you are targeting. You can also block phones and websites. Mspy allows you to spy on text messages too. Users have the option to remotely lock a device and wipe its data.
Mspy can serve as a keylogger or GPS tracker. You can even use it to read e-mail exchanges. Not too cheap but interesting nonetheless.