Across 4 observed Apple App Store storefronts, Bass Booster, Volume Amplifier is free to download in every stored observation. Because every observed download price is zero, the repeated per-country zero-price table is collapsed into this summary.

Observed storefronts: 4
Download price: Free in all stored observations
Reference currency: USD
Rate date: 2026-08-17
Latest observation: August 12, 2026

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Public in-app purchases

Current public in-app purchase prices from the US App Store storefront.

Sound Amplifier - Bass Boost$9.99

Volume Booster, Equalizer (EQ)$5.99

Sound Amplifier - Bass Boost$7.99

Sound Amplifier - Bass Boost$5.99

Sound Amplifier - Bass Boost$9.99

Bass Booster・Volume Equalizer$7.99

Volume Booster, Equalizer (EQ)$29.99

Sound Amplifier - Bass Boost$19.99

Volume Booster, Equalizer (EQ)$7.99

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Download price

Free in all observed storefronts

All 4 stored App Store observations have a download price of 0. Repeated zero-price country rows are hidden because there is no regional price difference to compare.

4 storefronts · free

Latest regional observation: August 12, 2026. Individual storefront records remain available to AppPriceData without repeating identical zero values here.