Coverage & Signal Simulation
Model strong, weak, and unstable network conditions to validate in-app behavior.
Built for mobile reliability testing
Test app behavior in real-world network conditions.
DevMock simulates weak coverage, high latency, jitter, and connection drops so your team can validate key user flows before release.
Everything you need to stress-test app behavior
Latency, Jitter & Packet Loss
Inject realistic instability to test retries, timeouts, and fallback behavior.
Image Upload Testing
Validate image upload progress, retries, and failures across slow and unstable networks.
Video Upload Testing
Test large and chunked uploads, resume behavior, and timeout handling under poor connectivity.
Offline/Online Transitions
Simulate connection drops and reconnects to verify graceful offline-to-online recovery.
Use cases
Mobile App Reliability
Ensure core app flows behave well in weak coverage, high latency, and intermittent connectivity.
Image Upload Flows
Test compression, progress states, retries, and failed uploads for user photos.
Video Upload & Processing
Validate large upload behavior, chunk retries, and resumable upload logic.
Auth & Session Stability
Verify sign-in continuity, token refresh, and session handling during network drops and reconnects.
E-commerce Checkout APIs
Stress-test cart, payment, and order flows under degraded network conditions.
CI Reliability Regression Tests
Run repeatable network-condition tests in CI to catch reliability regressions early.
How DevMock works
1
Define network scenarios
Choose profiles for coverage, signal strength, latency, jitter, and packet loss.
2
Run your app flows in each condition
Exercise app journeys like sign-in, uploads, and checkout while DevMock applies controlled network behavior.
3
Review failures and improve resilience
Identify issues in retries, timeouts, reconnect handling, and edge-state UX before release.
Built for teams shipping on unpredictable networks
“We found timeout and retry issues in staging that only showed up on weak coverage. DevMock helped us fix them before release.”
Evans Mbongo
QA Engineer, Amalitech Limited
“DevMock made it easy to simulate real network conditions and validate our app's behavior. We caught issues early and shipped with confidence.”
Anthony Bassaw
Web Developer, Devops Africa Limited
“QA can now reliably reproduce flaky network issues instead of guessing. Reviews are much more focused.”
Emmanuel Ofori
QA Engineer, Devops Africa Limited
“FieldTool is an image and video intensive app, and DevMock has been a game changer for testing upload flows under real network conditions. Since many users work in remote areas with poor connectivity, it helped us catch critical issues early and ship with confidence.”
Brembie
QA Engineer
Start free and validate real-world behavior early.
Use DevMock to run app flows under varied network conditions and evaluate reliability issues before release.
About the Developer
DevMock was created by Augustine Cobbold, a software engineer passionate about improving app reliability and user experience across real network conditions. With experience in building mobile apps and backend services, Augustine understands the challenges teams face in testing and validating app behavior under unpredictable connectivity. DevMock is his solution to help teams catch network-related issues early and ship more resilient apps.
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