Music Volume Booster: Bass EQ
Equalizer, Amplifier, Louder
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Quiet tracks, fixed: a real +6 dB boost dial, 10-band EQ with bass presets, and a live spectrum for the music you import. Louder, without the distortion.
Make your music louder — really louder. Boostbox is a music player with a boost dial that adds up to +6 dB of true gain (that's 200%), a 10-band equalizer, and a live spectrum, so quiet tracks finally hit as hard as the rest of your playlist.
Most volume booster apps promise 400% or system-wide magic they can't deliver. Boostbox does it the honest way: real gain applied to music played inside the app. Import your files, turn the dial, hear the difference in seconds — while a built-in limiter catches the boosted peaks so louder never turns into distorted.
WHAT YOU GET
• That quiet old MP3 finally plays as loud as everything else — boost dial from 0 to 200%, up to +6 dB of real gain
• Bass you can feel on flat-sounding tracks: 10 bands from 32 Hz to 16 kHz with Bass Boost, Vocal, Rock, and Flat presets
• Your own sound saved as Custom — drag any band and the curve is yours
• A spectrum that moves with the actual audio — 24 bars driven by a real FFT analysis, not a canned animation
• Music keeps playing with the screen off — background playback with play, pause, skip, and seek
• Import songs from the Files app and remove them anytime; five built-in tracks let you test the dial before adding your own
PERFECT FOR
• Commuters whose earbuds can't compete with the train
• Anyone with a folder of old MP3s mastered quieter than modern streams
• Bass heads who want the 32 Hz band to actually show up
• Listeners who need vocals lifted above the mix without touching the bass
WHY NOT JUST USE THE VOLUME BUTTONS?
The volume buttons stop at 100% of what the file gives them — a quietly mastered track stays quiet. Boostbox adds gain to the audio itself, up to +6 dB on top, then limits the peaks so it stays clean. To be clear: the boost applies to music played inside Boostbox, not to other apps or your whole phone.
PRIVATE BY DEFAULT
Your music stays on your device. No account, no uploads, no tracking of what you listen to. An optional daily reminder is the only notification, and only if you turn it on.
FULL ACCESS
Boostbox Pro unlocks boost beyond 100% (up to 200% / +6 dB), the Bass Boost, Vocal, and Rock presets, and the full custom 10-band equalizer. Choose a Weekly or Yearly auto-renewing subscription, or a one-time Lifetime purchase. Prices are shown in the app before you pay; subscriptions renew until cancelled in your Apple ID settings.
Download Boostbox, import one quiet track, and turn the dial past 100 — you'll hear the difference in ten seconds.
Terms of Use (EULA): https://web-levi.web.app/terms
Privacy Policy: https://web-levi.web.app/privacy-policy
Questions? tphuc.work@gmail.com
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Subscriptions
In-App Purchases
The developer, Phuc Pham, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Phuc Pham
- Size
- 7 MB
- Category
- Music
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Spectrum Visualizer Lifetime $69.99
- MP3 Player Yearly $34.99
- Sound Gain Weekly $6.99
- Copyright
- © 2026 Phuc Pham