Discover Applications
Monitor and analyze web and mobile application performance, errors, and user behavior from real user sessions across browsers, devices, and networks
The Applications feature in Discover is Last9’s Real User Monitoring (RUM) solution for web and mobile applications. Install the appropriate SDK and get real-time insight into how your app performs from your actual users’ perspective — Core Web Vitals and JS errors on the web, app startup and screen load times on mobile, plus sessions, errors, and user journeys on both.
Unlike synthetic monitoring, Discover Applications captures how your application actually performs for real users across different devices, networks, and locations.
What you can monitor
The Applications UI surfaces different metrics depending on whether the ingested data comes from a web or mobile SDK.
Performance
- Web: Core Web Vitals — TTFB, LCP, FCP, CLS, INP. Traffic patterns by path, browser, device, network, geography.
- Mobile: Cold Start, Warm Start, Screen Load Time. Traffic patterns by screen, OS version, device model, app version.
Errors
- Web: JavaScript exceptions, promise rejections, failed network requests, CSP violations. Breakdowns by browser, screen size, network type, device type, geography.
- Mobile: Unhandled exceptions, native crashes, Flutter framework errors, ANRs (Android). Breakdowns by OS version, device brand/model, app version, network type.
Sessions
Analyze user journeys, session duration, and engagement. Track how users navigate — page paths on web, screen transitions on mobile — and identify drop-off points.
User interaction insights (web)
Capture clicks, scroll depth, keyboard navigation, form focus/input, and touch gestures with optional element text, labels, and ARIA metadata. Correlate frustrating flows with errors and performance.
Key Benefits
- Identify Real Issues: See problems that actually affect your users, not just lab conditions
- Prioritize Optimizations: Focus on pages and issues that impact the most users
- Track Improvements: Measure the impact of performance optimizations and bug fixes over time
- Environment Comparison: Compare performance across different deployment environments
- Version Analysis: Understand how new releases affect user experience
- Real-Time Filtering: Filter by pages, user attributes, environments, and versions for targeted analysis
Setup and Usage
Install a RUM SDK
Web (JavaScript), Android, iOS, React Native, and Flutter SDKs
Performance
Core Web Vitals on web, app startup and screen load times on mobile
Errors
JS exceptions and failed requests on web, native crashes and ANRs on mobile
Sessions
User journeys, session duration, and engagement patterns across platforms
Troubleshooting
Please get in touch with us on Discord or Email if you have any questions.