[mysteriousllama]

Tasker for Android can help notify you if this is happening to you.

From the documentation I've gathered stingray devices appear to impersonate a cell tower with a stronger signal than the real one in order to get the device to associate. This means that stingray devices likely have their own cell ID so as not to trample the real one. If it didn't, it'd be a jammer not an interception device.

A simple PoC Tasker script (I wish it had an actual text-based language..): Add a new state, "Cell Near", Scan and pick the tower with highest signal. Invert the action. Tie it to a Notification task.

Whenever your phone associates with anything other than that tower you will get a notification. If you're good with Tasker it can be expanded to use GPS/Expected-tower pairs and alert you if something strange is going on.

Yes, someone should write an app for the general public. Maybe even see if the EFF can help promote it!

[genericacct]

https://github.com/SecUpwN/Android-IMSI-Catcher-Detector

[atmosx]

Hm, impressive. Nothing for iOs right? Android might not be as polished, but gets all the cool stuff.