Organizations needed legally valid digital signatures on mobile with support for Aadhaar-based and DSC authentication, but existing solutions were clunky and desktop-first.
We built the mobile frontend for a digital signature platform that enables legally valid document signing on both iOS and Android, with support for multiple authentication methods and offline functionality for areas with poor connectivity.
Client
A legal tech company...
Timeline
10 weeks
Team
1 engineer
Industry
Legal Tech
The client had a mature digital signature backend but needed a modern mobile experience. Their existing mobile solution was slow, hard to navigate, and didn't support offline workflows. Users in the field — sales reps, healthcare workers, government officials — needed to capture signatures in locations with unreliable connectivity and have them sync automatically.
Built a cross-platform Flutter app providing a native experience on both iOS and Android
Implemented secure signature capture with multiple authentication methods including biometric verification
Created offline-first architecture that queues signatures and syncs when connectivity is restored
Designed comprehensive audit trail UI showing signature validity, timestamps, and authentication chain
60%
Faster Signing Flow
Offline
Full Offline Support
0
Validity Disputes
10 wks
Delivered In
App adoption grew rapidly after launch, replacing the older mobile experience
Offline signing enabled use cases that were previously impossible
User time-to-sign reduced significantly compared to the previous mobile interface
Zero signature validity disputes since launch thanks to robust audit trails
“The old mobile app was basically unusable. Field teams avoided it and went back to paper. The new Flutter app is fast, works offline, and our adoption numbers speak for themselves. It's night and day.”
— Product Lead, Digital Signature Platform
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