Skype Lite is Android app intended for India only, you can install it through Yalp market or from Apk mirror, it's pretty much same as proper Skype, just 3 times smaller and should be lighter on data, not sure why Microsoft doesn't officially allow it in other markets too since it can deal with your voice calls, skype calls, SMS, chat so you could replace your dialer, your messaging app and your Skype
Signal should be always introduced just as nice SMS/MMS app and add it can also send encrypted chat messages if other party has Signal as well, because what's the point having single purpose SMS app when you can have app providing two options of delivering your messages, I think it's good way to sell Signal, considering most of built in SMS apps are crap.
Signal should be always introduced just as nice SMS/MMS app and add it can also send encrypted chat messages if other party has Signal as well, because what's the point having single purpose SMS app when you can have app providing two options of delivering your messages, I think it's good way to sell Signal, considering most of built in SMS apps are crap.