MP3 GAIN by Keerby is a lossless MP3 amplifier that boosts your music and audiobooks without re-encoding. It uses statistical loudness analysis to maximize perceived volume while avoiding clipping, earning a 3.57/5 rating from 2,974 reviews and accumulating 100,000+ downloads. It isn’t ranked in any top charts.
Pros & Cons
Lossless gain preserves audio quality by avoiding decoding/encoding.
Perceptual loudness analysis aligns boosts with human hearing.
Get a detailed PDF report for MP3 GAIN with download trends, rating history,
and key performance statistics — useful for competitive research or tracking your own app.
Learn more
★★★★★
Reasonably good app. Just have to learn what you can do with it and what you can't. Obviously you're not going to get the android version to match up to the PC version. On last check, PC's are about 100x larger and powerful. Let's just be gentle. These guys can get turned off like anybody else, and we do need him to stay at the table, because I've scoured the Internet and this seems to be a one-of-a-kind app in the way it actually handles files. It works on the same file. All the others create a separate file which then requires you to now replace the "old" file with the "new" one in all your playlists. Also it doesn't alter the original file which means you can always return the files to its original state ... again all without ever losing its placement in all your playlists.
★★★★★
This was the only app that could increase my music for a Samsung Galaxy S6 Edge. It didn't ruin my music, I even did a comparison between Play Music and MP3 Gain and it was definitely a HUGE difference. I recommend using +3 db. And ONLY CHANGE IT ONCE because it automatically saves the next time you change it with what you already have added. If you do change it again by accident then you'll have to delete the actual file. Also, if you click on the music file by accident and don't want to change the db then just use "0" as it already is and then click "Apply Gain" so it won't effect what you already have set. Enjoy! 👍
★★☆☆☆
Can't batch process. I have 800 songs and I'm not about to load each one
★★☆☆☆
Doesn't work. Tried +12 and -20db changes, no effect. The interface is terrible as well. What looks like a refresh button is apparently the apply gain button. The buttons don't have any text on them so you're stuck guessing. No guide or explanation of how to use the app, and the navigation is white letters on top of light gray. Idiot design. The app doesn't do what its namesake does and scan the files either. This app is probably a fake, so go on a pc and get the actual program. At least you know that works.
Technologies used by MP3 GAIN
5 permissions·2 libraries
Subscribe to see full permission and library details
Trust & Safety: The app requests network and storage permissions (ACCESS_NETWORK_STATE, INTERNET, READ_EXTERNAL_STORAGE, WRITE_EXTERNAL_STORAGE) and VIBRATE. These are common for file processing and UI feedback. There is no evidence of accessing sensitive user data beyond file manipulation; users should back up files before applying changes.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
