The built-in apps get and send SMS from a system service on Android. In nearly every case the system app is from the same vendor as the system itself which means there’s no significant opportunity for data disclosure that doesn’t already exist within the system. If anything , the system has much larger opportunity to vacuum data. Therefore if you don’t trust the system SMS app, you shouldn’t trust the system either. If you trust the system, you can probably trust the system SMS app too. Third party SMS apps present net additional opportunity for data disclosure so one has to trust the one they use doesn’t vacuum data.
The built-in apps get and send SMS from a system service on Android. In nearly every case the system app is from the same vendor as the system itself which means there’s no significant opportunity for data disclosure that doesn’t already exist within the system. If anything , the system has much larger opportunity to vacuum data. Therefore if you don’t trust the system SMS app, you shouldn’t trust the system either. If you trust the system, you can probably trust the system SMS app too. Third party SMS apps present net additional opportunity for data disclosure so one has to trust the one they use doesn’t vacuum data.