From there, it gives you a rating on romantic or flirty your crush's language is — and can even give you tips on how to improve your communication.
"In many ways, Mei is the world's foremost expert on texting, having seen more pick-up lines, flirty texts, passionate exchanges, and spiraling break-ups than any human," says founder Es Lee.
"Mei acts as the friend you hand your phone to when you need help decoding a conversation, but instead of relying on personal judgment, her assessment and advice are based on data and knowledge accumulated from years of research."
But, there's a catch. The app only works with Whatsapp and you need to have at least 500 words from your crush in order to work.
So, if your crush is currently sliding into your DMs, you may need to move them over to Whatsapp with a subtle 'Hey, my mum is monitoring my Instagram account so I need to take this convo elsewhere."
Oh, and don't worry — your crush has no way of knowing you're using an app to analyse their messages!
Each analysis costs $8.99 US per analysis, which is around $13 AU. Which is pretty much equivalent to the cost of decoding messages with your friends over a pizza!
If you do want to give Mei a whirl and hopefully gain some crush clarity, you can download if for iOs here.