Community Alert App Development

I need a mobile "Alert" app for both iOS and Android to enhance safety in our small community of 300. The app will allow residents to quickly notify others of suspicious activity.

Key Features:
- Simple "Alert" button to send notifications
- Alert message format: "Person - and Person's address"
- Admin approval required for new users
- Admins manage a master list via a web interface
- Notifications sent as SMS messages

Ideal Skills and Experience:
- Experience in mobile app development for both iOS and Android
- Familiarity with SMS integration
- Web interface development skills
- Experience in managing user authentication and approvals
- Background in community safety applications is a plus