Overview
This lecture explains how to manage running mobile apps in iOS and Android, focusing on app behavior, troubleshooting slow devices, and understanding battery usage.
Managing Running Apps
- iOS and Android do not show running processes but display running apps via an app switcher.
- Open the app switcher on iOS or Android to see a list of active apps.
- Foreground app is the one currently in use; all others are background apps.
- OS suspends background apps to save battery and improve performance.
App Suspension and Closing
- Suspended apps are paused but not closed; they may be woken by the OS when needed.
- OS prefers to keep apps suspended rather than closed for better battery usage.
- Misbehaving or unsuspendable apps can slow the device and drain battery.
- Close background apps by swiping them away in the app switcher on iOS and Android.
- "Clear All" can be used on some Android versions to close all apps at once.
Troubleshooting and Performance
- Troubleshoot slow devices by closing apps one at a time, starting with the most recently used.
- Only close apps regularly if they are causing issues; otherwise, leave them suspended.
- Closing and reopening apps uses more battery than leaving them suspended.
- If closing apps doesn't help, reset the app (clear cache) or restart the device.
- Persistent performance issues may require deeper investigation.
Battery Usage Analysis
- View battery usage in Settings > Battery > Battery Health (iOS) or Settings > Battery > More > Battery Usage (Android).
- Check which apps consume the most battery to spot potential issues.
- Determine if high battery usage is expected based on the app's function and user needs.
Key Terms & Definitions
- Foreground app — The app currently being used on the screen.
- Background app — Apps that are running but not actively in use.
- Suspended app — A background app paused by the OS to save resources.
- App switcher — Interface showing recent and running apps for switching or closing.
Action Items / Next Steps
- Practice opening the app switcher and closing apps on both iOS and Android devices.
- Check battery usage for installed apps and identify any that may need attention.
- Refer to device documentation for app management steps if user interface differs.