Lightning Bug - Sleep Clock

29.7K reviews
Content rating
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About this app

Lightning Bug
Lightning Bug, ambience and white noise mixer.
Mix some me time! Find sleep and relaxation easier with Lightning Bug, an ambience and white noise mixer for Android powered devices. Lightning Bug features a library of almost 200 sound loops and samples ranging from the natural peace of rain storms and ocean waves, to pure white noise, city trains, meditation bells, acoustic and electronic instruments, and down-tempo break beats.

Lightning Bug also includes many soothing backgrounds and sound visualizations. It even has a stylish, customizable digital clock with alarm, a great replacement for your bedside alarm clock!

For the full Lightning Bug experience, check out plugins. Press the puzzle piece!

Having a problem with sounds and icons disappearing?
The original version of Lightning Bug stored files to a generic folder on your SD card. But in the last year or so various anti-virus and disk utility apps have determined this type of storage is suspect and, in some cases, will automatically delete the contents of Lightning Bug's content folder. So, in our latest release, as of this writing, we moved Lightning Bug's folder into protected app storage on your SD. This will prevent anti-virus and disk utility apps from deleting your icons and sounds.

This means that if you're sounds and icons were already gone before installing, they will still be missing. The update will prevent your sounds and icons from going missing again, but unfortunately you'll have to re-install your plugins one more time. We're very sorry for the inconvenience!

Interested in Beta Testing?
Read our tester guide for more info here:

- Almost 200 sound samples and loops engineered exclusive for Lightning Bug
- Over 50 soothing backgrounds and sound visualizations
- Control each sound’s volume (long press the sound’s icon)
- Plugin-Mode for adding lot’s of high quality new content (look for the puzzle piece!)
- Control each sample sound’s playback frequency (plugin-mode only)
- Customize each scene with whatever sounds you want (plugin-mode only)
- Digital Clock, customize font, color, screen size, and date\time format
- Alarm Clock with customizable Snooze
- Sleep Timer w\ App Shutdown
- Screen Dimmer
- Screen Timeout
- Supports All Screen Orientations (except upside down)
- Disable Device Button Lights

We’ve been lucky to work with some very talented artists willing to contribute their skills to making Lightning Bug better for all. Please check out their sites, show them your support!

Photography by Maria “Jpeg” Izaurralde

Sounds by State Azure
Updated on
Nov 20, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
App activity and App info and performance
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

29.1K reviews
Nate Anderson
December 15, 2023
I do like this a lot. But it's really annoying that it starts up by itself. I mean, I close it -tap X- then close it again as I would when I close all tabs or apps open. But randomly, the rain noise comes on when there's no way I opened it by accident. It's the only app I can think of that does this. I started using it on an htc incredible and I remember it didn't do this back then. I forgot about it through some other phones but got it again recently. I may stop now.
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Technica Software
December 23, 2023
Please contact and we'll sort it out, thanks!
Amber Skye
November 15, 2023
I love this app when it functions correctly. There are random times when it will just stop working in the middle of the night and wake me up. I'll have to then shut the app down and open it back up to get it back on. It's a sleep app, so it's maddening when it randomly stops, waking me up, and I have to get my phone to fix it before going back to sleep...
2 people found this review helpful
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Technica Software
December 22, 2023
Please contact and we'll sort it out, thanks!
November 17, 2021
I bought this app years ago, and over time kind of forgot about it. I was traveling this week and needed some white noise to drown out the hotel sounds and after a sleepless night trying to use Spotify rain tracks, i remembered this app. I re-download it, and it's just as good as ever. It does exactly what I want and with no fuss or issues.
5 people found this review helpful
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Technica Software
November 17, 2021
Thank you for being a long time user, we're glad to have you back! 🙏😄, ⚡🐞

What's new

Local Weather has been removed. Because Lightning Bug's main purpose is not to provide you with local weather, we removed this feature to keep Lightning Bug compliant with Google Play. If you have questions, please contact