The Trust But Verify App ..."text my other phone."

mCouple is something you can download on your Android and iOS devices to keep track of your partners.

So if someone thinks their significant other is cheating on them or if they’re anxious about who their partner is talking to and where he/she is going... (You get the idea.) It works in a two-way fashion, so both the partners need to have it installed on their devices in order to take advantage of it... 

...its key concept is that all the history from you device will be accessible on your partner’s device. This means, any call or message you get during your day will be accessible on your partner’s connected smartphone without any bounds.

The same applies for contact entries made by you as well. ...its GPS tracking attribute makes it possible to track every move your partner makes. Facebook hasn’t been kept out of mCouple’s purview as well, with partners having been given the option of viewing all the Facebook chats of their significant others. (more)

FutureWatch: An in-app purchase offer for the Instant Alibi upgrade feature :)