What are the most effective strategies for improving mobile app user retent

Hi everyone,
Mobile app downloads continue to grow, but so does the challenge of keeping users engaged and returning regularly. With so many apps competing for attention, what strategies do you find most effective for improving user retention in mobile apps? For example:

Personalized onboarding experiences

Push notification timing and relevance

In-app messaging and rewards

Feature updates based on analytics

I’d love to hear your real-world examples, tools you use, and lessons learned from projects you’ve worked on!