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.