4 things you must care before to choose a spy software for cell phone :
1) the spyware is invisible on the cell phone after installation ?
99% are not invisible like the sellers announce on there website. Check this link : http://www.1mole.com/1mole-spyware-invisible
2) how much is the cost and can you test on your phone before to buy.
its easy to spend money but difficult to ask to refund money back.
3) does the software contain too much features and can slow down very quick the battery of the phone you plan to spy.
(listen live conversation, capture picture, record calling... is only to attractive customers to buy but not useful because it kill the battery). If the people you spy discover his battery slow down too fast he will reset his phone and at the same time will delete the spyware you just installed.
4) Never use a software when you cannot know who is the owner of the website . They are some spy wares became a virus in 2013. They offer 48H free to attractive users. After you install on your phone, the virus can execute some calling or send sms from your phone without you know. (check your cellular billing every month). When you try to uninstall the spyware, you cannot and it still continue to run. Only one way to delete the virus is to reset your phone or (jailbreak again with an idevice)
In 2013, the best solution Safety and 100% FREE is at WWW.BOSSPY.COM