In a market saturated with streaming service widgets, Bass Booster, Volume Equalizer by Sirbu Maruta carves out a niche as a dedicated system-wide audio enhancement tool for iOS. The app positions itself as a software intermediary, processing audio from any source before it reaches the headphones or speakers. This approach allows it to function with Apple Music, Spotify, YouTube, and local media files, attempting to deliver a more consistent and powerful listening experience from a mobile device. Core functionality centers on a multi-band equalizer with several predefined presets—such as Rock, Pop, and Classical—alongside a fully customizable manual mode. The signature feature is the bass booster, which applies low-frequency gain, and a separate volume normalizer aims to reduce drastic volume jumps between different media tracks. A notable inclusion is a mono audio switch, which is a practical accessibility feature often buried deep in system settings. The interface presents these controls in a single, tabbed layout, making adjustments relatively quick. For real-world usage, the app is typically opened and a preferred profile selected before starting playback in another application. In testing, the bass enhancement is immediately perceptible with consumer-grade earbuds, adding noticeable thump to bass-heavy genres. The volume normalizer shows mixed results; it successfully levels the volume between, for example, a quietly mastered podcast and a loud music track, but can occasionally introduce subtle audio compression artifacts. The system-wide claim holds true, though there is a barely perceptible delay when initiating playback after enabling the processor. As a relatively new entry with no published user reviews, broader community feedback trends are not yet established. However, based on common user reports for similar apps in this category, the value proposition hinges on the finetuning capabilities absent from stock iOS. Users often seek these tools to compensate for weak built-in speakers or to tailor sound to specific headphone models. The lack of in-app purchases or subscriptions, as currently presented, is a point that typically resonates positively with users wary of recurring fees for utility software. Overall, Bass Booster, Volume Equalizer offers a focused set of audio adjustments that work as advertised. Its strengths lie in its simplicity, system-wide application, and one-time cost structure. The limitations are inherent to digital signal processing on iOS; audio quality ultimately depends on the original source file, and over-processing can lead to distortion. For users seeking more control than their music app provides, this is a functional and affordable option, though it may not satisfy audiophiles looking for lossless, high-fidelity manipulation.