Equalizer - Volume Booster EQ

What it does

Equalizer is a mobile music player designed for users who want granular control over their audio experience. The app allows users to import their own music or download curated packs and then apply a suite of advanced audio effects. These include a multi-band graphic equalizer, a volume maximizer, pitch and tempo controls, and a visually impressive spatial audio effect.

Where it shines

Where the app truly stands out is in its tangible and playful interface for complex audio tools. Instead of just presenting rows of generic sliders, it creates interactive visualizations for its effects. The spatial audio tool, seen at 01:46, is a prime example, using a 3D head model and animated particles to represent the soundscape. This approach makes sophisticated audio manipulation feel accessible and engaging. The app also excels at getting users started quickly by offering one-tap music pack downloads during setup (00:30), solving the common "empty library" problem.

UX highlights

Proactive Content Seeding: The app offers to download entire music libraries from sources like Audius during onboarding (00:33), ensuring users have content to experiment with immediately.
Visual Effect Controls: Abstract concepts are made concrete through dynamic visualizations, such as the particle system for spatial audio (01:48), which makes adjusting settings intuitive.
Clear Library Organization: The main "My Music" screen (00:43) is cleanly divided into Artists, Playlists, and Songs, using familiar patterns that make navigation straightforward.
Non-blocking Confirmations: Actions like removing a song from a playlist trigger a small, temporary toast notification (02:06), providing feedback without interrupting the user's flow.
Polished Loading States: The app uses a subtle shimmer animation (00:45) when loading album art, which is a more refined experience than a standard spinner.
Efficient Playlist Creation: Users can quickly create and add songs to a new playlist directly from a song's context menu in just a few taps (01:05 - 01:14).

Monetization & growth

While a formal paywall screen isn't shown in this recording, the monetization strategy is introduced very early. At 00:13, a full-screen display promotes "Music One," a premium subscription that bundles access to 17 different apps from the same publisher, Gismart. This suggests a strategy focused on converting users to a higher-value, ecosystem-wide plan rather than just a single-app subscription. The app also employs a standard growth tactic with an in-app rating prompt (00:48) to encourage positive App Store reviews.

Who it’s for

This app is for music lovers and audiophiles who want to go beyond the standard playback controls of default music players. It caters to users who enjoy tweaking sound profiles, whether it's boosting the bass for a workout, adjusting the tempo of a track, or creating a more immersive listening experience with spatial audio. It's also suitable for users who want an all-in-one player for music sourced from various cloud services and local files.

Notes & opportunities

While the interactive effects are a major strength, the initial onboarding could benefit from pre-permission warm-up screens. The app currently jumps directly to system prompts for tracking (00:10) and media access (00:28), which can be jarring for some users. Providing a brief explanation of why these permissions are needed could improve the grant rate. Additionally, the purpose of the "Maximizer" effect (01:30) could be made clearer with a small tooltip or label for users unfamiliar with audio production terms.