Speaker Booster - Ampcrank

Volume maxed out and still hard to hear? Ampcrank is an audio-boosting player: import your music, podcasts, recordings, and voice messages, then make them louder and clearer with real volume gain and a full equalizer.

VOLUME BOOST
- 0 to +24 dB digital gain — turn the knob and hear the difference instantly
- Built-in limiter keeps audio clean and distortion-free even at maximum boost
- Live level meter and spectrum animation show the boost at work

EQUALIZER
- Vocal Booster: brings muffled, unclear speech into focus
- Bass Boost: deeper, punchier low end
- Podcast / Voice Memo: tuned for recordings and voice messages
- 10-band manual EQ (31 Hz–16 kHz) with savable custom presets

A COMPLETE LOCAL PLAYER
- Import MP3, WAV, M4A, FLAC, and AAC from the Files app or iCloud Drive
- Extract the audio track from MP4 videos
- Receive audio files shared from other apps via the system share sheet
- Background playback with Lock Screen and Control Center controls

CLEAN AND SIMPLE
- No account required; your audio files stay on your device and are never uploaded

HOW IT WORKS
Ampcrank enhances audio through digital signal processing (gain + EQ + limiting) applied to files played inside the app. It does not raise your iPhone speaker's hardware volume limit, and it does not amplify other apps, ringtones, or phone calls.

AMPCRANK PRO
- Boost audio all the way to +24 dB
- Use the full 10-band equalizer
- Unlock every preset, custom presets, and loop mode
- Payment is charged to your Apple ID. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in App Store settings.

This app is using the standard Apple Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/