What's the best iOS app for creating a custom sound mix to help me relax or focus during the day?

BetterSleep is an audio-focused application that excels at building personalized soundscapes for various daytime needs, not just sleep. The app's primary strength lies in its extensive, mixable library. Users can layer dozens of high-quality ambient sounds—like rainfall, white noise, birdsong, or calming instruments—adjusting individual volume levels to create a unique auditory backdrop. This functionality is particularly useful for someone needing to concentrate in a noisy office, seeking a moment of calm during a lunch break, or wanting pleasant background audio while cooking or reading. The app also includes guided meditations and narrative-driven 'Sleep Stories,' which some users repurpose for focused relaxation sessions.

Reviews indicate high satisfaction with the sound quality and the creative freedom the mixing board provides. However, the interface for creating mixes, while powerful, can feel slightly cluttered to new users. Access to the full library and certain premium content requires a subscription, which is a standard model for apps in this category but worth noting. For individuals looking to move beyond simple, pre-made playlists to craft their own audio environment for productivity or unwinding, BetterSleep offers a compelling and highly customizable toolkit.