Native Wallet App with Biometric Login and Real Time Transaction Updates
A fintech startup needed a native wallet experience with strong security and smooth performance. We built iOS and Android apps with biometric login, secure storage, and real time transaction updates. The app shipped with a release process that supported rapid iteration and safe rollouts.
Confidential engagement. NDA available upon request.
4.7
Average Rating
99.8%
Crash Free Sessions
45%
Faster Onboarding
10
Weeks to Launch
About the Client
Industry
FinTech
Company Size
18 to 35 employees
Background
A fintech team building a consumer wallet and rewards experience. Security and trust were critical, and the app needed to feel fast on day one.
Security and Product Challenges
Secure authentication and session handling
The app required biometric login, token rotation, and safe session recovery across network conditions.
Realtime updates without battery drain
Transactions and balances needed timely updates while preserving battery life and performance.
Onboarding drop off
Legacy flows had too many steps, unclear errors, and inconsistent validation.
Release safety
The team needed staged rollouts, observability, and a fast hotfix path.
The Mission
Ship a secure native wallet app with smooth onboarding, reliable realtime updates, and a release process that supports rapid iteration without instability.
How We Approached It
01. Design and security baseline
Week 1 to 2- Threat modeling for auth and sensitive actions
- UX mapping for onboarding and core wallet flows
- API contract alignment for transactions and balances
- Telemetry plan for activation and reliability metrics
02. Implementation
Week 3 to 8- Native iOS and Android implementation
- Biometric login and secure storage integration
- Realtime updates with efficient polling and caching
- QA across device matrix and poor network simulations
03. Launch readiness
Week 9 to 10- App store submission support and review readiness
- Crash monitoring and alerts
- Staged rollout playbook
- Post launch stabilization support
Vulnerabilities Discovered
0
CRITICAL
1
HIGH
2
MEDIUM
1
LOW
Session recovery edge cases
Certain timeout scenarios caused stale sessions without a clear recovery path, impacting trust and usability.
Certain timeout scenarios caused stale sessions without a clear recovery path, impacting trust and usability.
Sensitive screen privacy gaps
App switching and screenshots required additional privacy controls for sensitive screens.
App switching and screenshots required additional privacy controls for sensitive screens.
Validation inconsistencies in onboarding
Input validation rules differed across screens, causing avoidable errors and drop off.
Input validation rules differed across screens, causing avoidable errors and drop off.
Overly verbose error messaging
Some error states were too technical and did not guide the user clearly to the next action.
Some error states were too technical and did not guide the user clearly to the next action.
How We Fixed It
Secure auth and session handling
Hardened token rotation and session recovery, with clear user states under network stress.
Privacy and security controls
Added sensitive screen protections and stronger device level security assumptions.
Onboarding simplification
Reduced steps and standardized validation with clearer error copy and guidance.
Measurable Outcomes
The app launched with strong stability and a security posture that supported trust and growth from day one.
99.8%
Crash Free Sessions
45%
Faster Onboarding
4.7
Average Rating
22%
Higher Activation
Want to share this with your team or leadership?
Sharing a URL with your co-founder, CTO, or board does not always land the way it should. A polished PDF tells the same story in a format people actually open, read, and forward in Slack.
Download this case study as a branded PDF complete with key metrics, methodology, and outcomes and drop it straight into your next internal review, due diligence pack, or vendor evaluation deck.
Instant download · No sign-up required