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GoTall
A "height growth app" created by a 20-year-old college student. It resonated with teenagers and became a massive hit. It went viral on TikTok and surpassed $150,000 in monthly revenue within 8 months.
UX Highlights
To predict the user's future height, numerous questions are displayed. As a user, you're very interested in the height prediction, so you continue entering data without dropping off. With over 40 screens and an impressive 91% paywall reach rate.
Monetization
With the paywall, you must pay if you want to check the predicted height value. If you cancel the paywall, you can move to the app usage screen and use some features, but the paywall will still appear when you try to use the core features.
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