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!