The BoldVoice team created an app that helps train English pronunciation.

As a promotion, they offer to read a short passage of text in English, after which the neural network will try to determine your native accent.

My accent was quickly exposed and classified as 100% Russian 🤣 And what about you?)

You can test your pronunciation here.

P.S.
From a marketing perspective, it's a great funnel. You test your accent, get a result, and then receive a strong offer and Call to Action:
"Sound like a native English speaker in 3 months with BoldVoice. Start your free 7-day trial today!
Get it on
GooglePlay"

They definitely have something to learn from.