The program doesn't matter as far as getting detected, if you abuse it, you will get caught (some app advertise that they have some kind of stealth mode, don't believe it, there is no way to hide that traffic, if a humand review your account, it will easily detect that you are tethering, your account don't get flag for review if you dont abuse it). As far as the App, I like Mywi, Since you have more control over the connection, output power, encryption, client list, and onDemand is great for the iPad.