StarMaker
Sing unlimited karaoke & duets
<$1K
Estimated monthly revenue
<1K
Monthly downloads
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Explore Paywall BuilderVolume Booster: Amplify Bass is an iPhone and iPad app for boosting audio volume and bass, adjusting sound with an equalizer, and playing music from supported libraries and services. It offers Premium access through weekly subscriptions listed at $4.99–$9.99 and annual subscriptions listed at $24.99–$29.99.
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