lofi40s

lofi40s is a small, quiet place to stay for a while.

A rooftop terrace above the city changes with your phone's clock: soft morning light, a golden sunset, string lights at night. Choose the sounds around you, add calm music, and let the rest of the day wait a little.

WHAT'S INSIDE
• Rooftop by the hour: 24 pictures, one for each hour of the day, follow your phone's clock. The scene tag shows the time, and you can pin the hour you like if you want it to stay.
• Ambient sounds: fire pit, rain, crickets, train and vinyl crackle. Turn each one on or off and give it its own volume.
• Sound versions: pick the version you like for each ambient sound.
• Tracks: 178 calm tracks in six themes: Slow Morning, Deep Focus, Reading, Café Ambience, Relax & Unwind and Late Night. Every track shows its tempo in BPM. Turn on one theme card or several and listen in BPM order, switch single tracks off and drag them into your own order. Three ready-made presets (Morning, Deep focus, Rest) get you started.
• Equalizer: shape the tracks with a five-band equalizer and presets such as Bass Boost, Warm, Bright or Vocal, to suit your headphones or phone speaker.
• Volume you can read: each sound shows its level as a number from 0 to 99. Tap the number to type an exact value.
• Saved mixes: keep what you hear as a tape, with its volumes, tracks and equalizer, and bring it back with one tap. Hold a tape to rename it.
• Timer: set the hours and minutes, up to 99 hours 59 minutes, and how long the fade lasts. A countdown shows on the main screen along with the controls, everything fades gently to silence, and an optional soft chime tells you the time is up (a Sleep timer always ends quietly).
• Focus timer and Focus log: label a timer Study, Workout, Reading, Work or Sleep, then look back at your week in a simple chart.
• A gentle quote: a short quote in English, with a Korean translation, greets you when you open the app and when a timer ends. Classic lines mix with lines written for lofi40s.
• Wake-up alarms: up to five alarms, each playing one of your saved mixes and rising gently. Snooze for 10 minutes or stop. If you were listening to something, it comes back when you stop the alarm.
• Background playback: keep listening with the screen off or while you use another app, with controls on the lock screen and in the notification.
• Play alongside other apps: keep your mix going while another app plays sound.
• The ? guide: tap ? to see what every control on the screen does. The Presets, Timer and Equalizer windows have their own ? button.
• Optional tips: if you enjoy the app, you can leave a tip through Google Play. A tip unlocks nothing; every feature is there for everyone.

PRIVATE BY DESIGN
• No ads, no accounts and no tracking, and lofi40s itself collects no analytics.
• Your mixes, alarms, plans, focus log and usage statistics stay on your phone. Uninstalling the app or clearing its storage deletes them.
• The internet is used to download music and, if you leave a tip, for Google Play's billing (its library sends its own diagnostics to Google). The music server gets only which files to send and, as with any internet connection, your IP address; it never receives your mixes, alarms, plans, focus log, usage statistics or any account or device identifier.
• Songs stream from the lofi40s music server as you play them; download the ones you want for offline listening. You can keep downloads to Wi-Fi in Settings. Alarms always ring, even without the internet.

GOOD TO KNOW
• The app runs in landscape.
• The app comes in English and Korean; you can choose the language in the app.
• Equalizer boosts are kept in balance with the volume to avoid distortion, and the deepest bass is felt most on headphones. Some phones don't support the equalizer.
• It asks for permissions only when you set an alarm: exact alarms, so it rings on time, and notifications.

Questions or feedback: lofi40s.app@gmail.com