Sales Activity Tracking App Development

I'm looking to develop a comprehensive sales tracking app for both iOS and Android platforms. The app should have the following functionalities:

User Roles:
- Admin, Manager, Sales Representative

Key Features:
- Login commitments
- Login updates till date
- Daily DSA visits
- Visits done till date
- Average DSA visits time
- Time spent on DSA shop
- Customer visits conversion rate
- Overall sales hours spent in the field
- New DSA target maker capturing

Authentication: Phone number with OTP

Ideal Skills and Experience:
- Experience in developing multi-role authentication apps
- Proficiency in both iOS and Android app development
- Strong UI/UX design skills
- Background in sales tracking or similar applications

Please feel free to suggest additional features that could enhance the app's functionality.