com.whateverwhatever is how Android app names work. Look at the initials do you have any apps on your device that could possibly use those initials in part or in whole to represent the name of an app? There is usually, but not always, some correlation.
I found the same hidden messaging apps you spoke of but I also found a business app that uses tinno. It may have something to do specifically with your device manufacturer, so telling us what device you have could be helpful as well, as Galactic Zoo asked.
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