Cat got your thumbs when it comes to the keyboard? Never fear, Taylor Swift to the rescue — sort of.

Tay Text, a new app founded by five Harvard business students, enables Swifties to incorporate more than 300 lyrics from 60 of the pop star’s singles into their messages — no matter what the social situation.

Unsure which line from “Blank Space” to include? The minds behind the 99-cent app, which launched Monday on iOS, have categorized the lyrics into 11 different themes, including “Into You,” “Over You” and “Party On.”

The Post took the app for a road test to see how it responds to various situations. Take a look: