Is it possible to use smartphone as a device to do different things?

[sidjohn1]

Yes, you can. Depending on your environment I would also check out the following:

[OBSOLETE] Fully Kiosk Browser Controller (DTH)

Gavin Campbell developed this driver for Hubitat when he found out that Fully Kiosk Browser had a REST API. This way you can use your tablet as a chime or using TTS in your apps. (without needing to install any additional phone apps such as LanNouncer, and without interfacing with Alexa or Google.) This is my SmartThings port of the Hubitat app. I use this app to replace Lannouncer mainly on Fire devices running the Fully Kiosk Browser, but it also works well on standard Android devices. Lannouncer is a superb app, however on my system Fire OS seems to put it to sleep, so it goes mute, and stops talking. Many of us use Fully with ActionTiles, so it is usually in the foreground. There also seems to be a message queue in Fully, so messages speak completely, no more message chopping when mu…

https://manything.com/ifttt.html