NightShield: Blue Light Filter

NightShield is a lightweight, privacy-first eye-care toolkit that sits quietly on your phone and steps in when the sun goes down.

One tap gives you a warm, adjustable tint that filters harsh blue light. Another dims your screen below the system minimum so late-night reading doesn't sear your eyes. A third gives you a gorgeous Always-On Display — clock, date and battery — so you don't have to wake the whole screen just to check the time.

Everything runs as a tiny overlay — no screen recording, no root, no ads that hijack your scroll. No login. No tracking. Your schedule, your settings, your phone.

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WHAT YOU GET (FREE)
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🌙 BLUE LIGHT FILTER
• Adjustable intensity (0-100%) and colour temperature
• 3 curated presets: Reading, Night, Movie
• Covers the status bar and navigation bar on every device
• Lightweight overlay — no system permissions beyond "Display over other apps"

💡 EXTRA DIMMER
• Drop your screen brightness below what Android allows
• Independent overlay — use it with or without the filter
• Perfect for pitch-dark bedrooms

🕐 ALWAYS-ON DISPLAY (AOD)
• 2 clock styles: Digital, Minimal
• Battery % built in
• Tap anywhere to dismiss
• Works on any Android phone — you don't need an AMOLED

⏰ AUTO SCHEDULE
• Pick exact start and end times
• Filter turns on and off on its own, every day
• Survives reboots

⚡ QUICK ACCESS
• Quick Settings tile — toggle the filter from your notification shade
• Home screen widget — tap to open
• Persistent notification — turn off with one tap, never surprised by a stuck overlay

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UPGRADE TO PRO (ONE-TIME)
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✨ Extra filter presets — Gaming, Bedtime, Sunrise
✨ AOD analog clock face
✨ AOD custom clock colours (amber, blue, green, red, purple)
✨ No advertisements, anywhere in the app
✨ Support a small, indie developer

Pay once, keep forever. No subscriptions.