Show HN: RentUp – I built a rent manager for my parents

Hey HN,

I built RentUp to stop juggling spreadsheets and missing tenant calls—especially for landlords who find modern apps too complex (like my parents).

RentUp keeps it simple: * Large, color-coded rent badges * Auto reminders for leases, maintenance, and tenant calls * Secure document vault with biometric lock * Works offline + guest sign-in (zero friction)

Tech: Kotlin • Jetpack Compose • Firebase Auth/Firestore • WorkManager

I’m looking for feedback on: * Readability & UI clarity at a glance * Call-reminder flow—does it make sense? * Scaling the UI for dozens of properties without clutter

Thanks, and excited to hear your thoughts!