... mobile apps and web, and I'd love to hear from folks actually building/running products. A few things I'm curious about: What tools are you using for engagement - push notifications, in-app messaging, email/SMS, onboarding flows, etc.? (Examples: OneSignal or anything homegrown.) What's working well - any tool or workflow that's genuinely made a difference in retention, activation, or support load? What's still a pain point? Common frustrations I keep hearing about: Fragmented data across mobile ...