Delivery App Rebuild Cuts Crash Rate to 0.3%
We rebuilt a struggling Pakistani delivery app from the ground up, resolving critical stability issues to achieve a near-perfect crash-free rate and skyrocketing app store ratings.
About the Client
Client identity withheld per NDA. A rapidly scaling delivery and logistics startup in Pakistan was facing severe operational bottlenecks due to a poorly optimized legacy mobile application.
Frequent Crashes Were Costing Orders
A poorly architected legacy codebase was completely failing under peak load.
Poor state management, memory leaks, and inefficient API calls caused the app to crash frequently for end-users at the payment gateway, and for riders during live GPS tracking. Furthermore, continuous background location tracking was heavily draining riders' phone batteries, making it difficult for them to complete full shifts. The technical debt was too high to patch; they needed a total rebuild.
What We Set Out to Achieve
Measurable goals agreed with the client before kickoff.
How We Got From Problem to Result
The process followed from kickoff to launch.
Audit
Deep-diving into Crashlytics to identify the legacy app's fatal memory leaks.
Architecture
Designing a scalable, lightweight state management system.
UI/UX Polish
Modernizing the interface while keeping core flows familiar to users.
Development
Rebuilding the consumer and rider apps entirely in Flutter.
Testing
Field testing with riders in low-bandwidth, high-density urban areas.
Deployment
Executing a phased rollout to monitor stability under real-world load.
What We Built It With
Before & After
Screens shown are representative mockups. Live product link withheld per NDA.
Before: High crash rates and poor UI
After: High-performance, stable architecture
Numbers From the Real Campaign
Metrics measured post-launch, compared against baseline.
What the Client Had to Say
"Client feedback is kept confidential under our client agreement. The rebuilt app completely stabilized their operations, allowing them to scale their order volume by 3x without technical bottlenecks, and riders love the improved battery performance."
How Long It Took
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