In short
Lose It keeps users motivated through a 109-screen onboarding. The first screen confirms the App Store promise, 53 screens segment users while 47 lift their motivation, a gradual warm-up comes before data collection, push permission is requested only on screen 103, and sign-up is followed immediately by a paywall with a 7-day trial.
№33 in Health & Fitness, 109 onboarding screens!
Downloads - 100K, Revenue - 2M

Exemplary Welcome screen #F1:


Information tailored to the USER's needs:
Gradual warm-up before data collection: 32 screens!
Sign-up is shown at the end followed immediately by the paywall.
User segmentation occurs after the warm-up and product trial phase (#F7):

You can find the full analysis here.