Support & FAQ

Installing Lumen Guard is simple:

1. Download Lumen Guard from Google Play
2. Open the app after installation
3. Grant the "Draw over other apps" permission when prompted
4. Start adjusting your screen dimming and warmth levels!

Lumen Guard requires the following permissions:

• Draw over other apps (SYSTEM_ALERT_WINDOW) - Required to display the dimming overlay on your screen
• Foreground Service - Keeps an active filter overlay available while you use other apps
• Notifications (optional) - Enables filter status updates and optional reminders; the filter still works when notifications are off
• Internet and Google Play Billing - Support Google Mobile Ads in the free version and an optional premium purchase

“Display over other apps” is required for the filter itself. Advertising and purchase data are handled by Google as described in our Privacy Policy.

To enable the screen filter:

1. Open Lumen Guard
2. On the Home screen, toggle the power button at the top
3. Adjust the dim and warmth sliders to your preference
4. The filter will be applied system-wide

Custom Scenes allow you to save your favorite dim and warmth combinations for quick access. For example, you can create:

• Reading Mode - Medium dim, high warmth
• Movie Mode - Low dim, low warmth
• Bedtime Mode - High dim, maximum warmth

To create a scene:

1. Go to the Scenes tab
2. Tap "Create New Scene" (Premium feature)
3. Adjust dim and warmth levels
4. Give your scene a name and save

Smart Scheduling automatically enables the screen filter at specific times. Perfect for evening eye protection!

To set up a schedule:

1. Go to the Schedule tab
2. Toggle "Enable Schedule"
3. Set your start time (e.g., 8:00 PM)
4. Set your end time (e.g., 7:00 AM)
5. Lumen Guard will automatically activate during these hours

No. Notifications are optional. The filter and schedules still work if you leave them off, but you will not receive filter status updates or night reminders.

You can change this later from Android's app notification settings or the App Notifications item in Lumen Guard's Settings tab.

• Dim Level - Controls the overall darkness of the screen overlay. Higher values make your screen darker, reducing brightness beyond system limits.
• Warmth Level - Applies a warm (orange/amber) tint to reduce blue light emission. Higher values provide more blue light filtering.

For best eye protection, especially before bedtime, use both a moderate dim level and high warmth level.

If the filter isn't displaying, try these steps:

1. Check Permissions - Go to Settings → Apps → Lumen Guard → Permissions and ensure "Display over other apps" is enabled
2. Restart the App - Close and reopen Lumen Guard
3. Check if Enabled - Make sure the power toggle on the Home screen is ON
4. Check Battery Settings - Some devices aggressively kill background apps. Add Lumen Guard to your battery optimization exceptions

This usually happens due to battery optimization settings:

1. Go to your device Settings
2. Navigate to Battery or Battery Optimization
3. Find Lumen Guard and set it to "Don't optimize" or "Unrestricted"
4. Return to Lumen Guard and confirm the schedule is still enabled

Currently, Lumen Guard applies the filter system-wide. If you need to temporarily disable it for specific tasks:

• Use the quick toggle on the Home screen
• Use the optional floating widget if you have enabled it
• Use the status notification when notifications are enabled

Lumen Guard is designed to be lightweight and battery-efficient. However, if you notice increased battery drain:

• Make sure you're running the latest version from Google Play
• Turn the filter off when you do not need it
• Use Android's battery settings to check which apps are consuming power on your device

If battery drain persists, please contact support with your device model and Android version.

To uninstall Lumen Guard:

1. First, disable the screen filter within the app
2. Go to your device Settings → Apps
3. Find Lumen Guard and tap "Uninstall"

All your settings and data will be automatically removed when you uninstall.

Premium unlocks the following features:

• Unlimited Custom Scenes - Save as many configurations as you want
• Unlimited Schedules - Set up as many routines as you need
• Floating Widget - Quick on-screen filter controls
• Ad-Free Experience - No in-app advertising placements

To upgrade to Premium:

1. Open Lumen Guard
2. Tap the Settings tab
3. Tap "Upgrade to Premium"
4. Complete the purchase through Google Play

Your premium features will be activated immediately after purchase.

Refunds are handled according to Google Play's current refund policies:

1. Open the Google Play Store app
2. Tap Menu → Account → Purchase history
3. Find Lumen Guard Premium
4. Tap "Request a refund"

For help with a purchase, contact us at beansnbrackets@gmail.com.