Sonavault: Echo Descent

Sonavault is an offline echo-navigation puzzle campaign set in dark, fading cavern fields. Pulse at meaningful moments, hold return geometry in memory, recover beacons, avoid moving obstructions, and choose a route before the field disappears. Sixty authored descents reward efficient coverage, controlled chains, and careful energy use. Campaign stars and best scores stay on this device. The illustrated fieldbook provides an offline reference for pulse behavior, echo memory, obstructions, route planning, scoring, and the visual language of the caverns. The new Echo Mapper lets you practice the core tradeoff. Adjust echo coverage and pulse reserve, introduce a moving obstruction, and watch route confidence respond. A deterministic daily blind-cavern survey supplies a shared date-based challenge without an account or server. Sonavault includes local achievements, haptic and high-contrast preferences, reduced-effects controls, Dynamic Type, VoiceOver labels, and iPhone and iPad layouts. Sonavault is an abstract puzzle game, not a navigation or safety instrument. One paid download includes every descent and feature. There are no subscriptions, ads, in-app purchases, accounts, analytics SDKs, microphones, location access, or remote unlocks.