Biyajkhata-Style App With Enhancements

I need an app that mirrors Biyajkhata’s customer-management flow while running natively on both iOS and Android. The reference app already covers the core screens and logic, so your main focus will be recreating that experience and adding two important extras:

• Key numbers panel – a quick snapshot of each customer’s outstanding balance, paid amount, and upcoming due date.
• Universal name search – a fast search bar that lets users find any customer from any screen in real time.

A cross-platform framework such as Flutter or React Native is fine, provided the final builds are smooth on modern and older devices alike. I’ll share Figma wireframes at project start; you’ll handle coding, basic UI styling consistent with Biyajkhata, and produce publishing-ready .ipa and .aab files. Source code must be clean, well-commented, and delivered via Git.

Acceptance criteria
• iOS and Android installs run without crashes.
• Customer-management workflow matches Biyajkhata’s behaviour.
• Key numbers widget and global search function exactly as described and update instantly.
• All logic passes tests with sample data I provide.

Please tell me which stack you prefer and how long you’ll need.