Available on iOS
Find the resonance.
Sorvelin is free on the App Store. iPhone and iPad, iOS 26.5+. No account, no ads, no purchases.
A quiet sensory app for iPhone & iPad
Listen for the field.
No score · No timer · No words
Sorvelin is a quiet sensory experience for iPhone and iPad. Drag a probe across a moving wave field. Buried in the noise are resonance nodes — points where the waves stack into a stable peak.
The field doesn't show you where they are. Three feedback channels converge as you get closer: the particles align, the oscillators bend toward unison, and the haptic grain thickens under your finger.
When all three lock, you've found one. A small bloom, a chord, a quiet pulse. The node leaves a ghost-mark, and the hunt continues.
Thousands of soft bioluminescent particles ride the wave amplitude. Near a node they brighten, slow, and tighten into a halo around your finger.
A bank of sine oscillators — one per wave generator — pitch-bends toward unison as you approach. At lock, a three-voice harmonic chord blooms and decays.
A continuous haptic grain rides under your finger, densifying with proximity. Lock fires a sharp transient followed by three decaying taps — a hand-felt resonance.
Sorvelin was built around things that are often missing from games: no timer, no score, no failure, no language. The field rewards slow attention and repetition. It doesn't demand a win condition — it just responds to where you are.
Three Sensory Presets let you choose how loud the field feels. Tap once and the whole app re-tunes — haptic intensity, motion, audio — to match. Drift between them across the day; the field doesn't care.
Full motion, full haptics, full audio. The field at its most alive — for picking up the app cold and exploring.
Reduced motion, lower haptic intensity. A calmer baseline for longer sessions or anyone sensitive to high-frequency buzz.
Low-stimulation profile pairing with Calm Mode. Still felt, just not loud. Built for sensory regulation moments.
Real interference of multiple sine sources. The whole field is one continuous mathematical surface, sampled every frame under your finger.
Hidden constructive-interference peaks discovered at field load. The detector runs once — runtime is just distance, so the field stays smooth.
A continuous CHHapticAdvancedPatternPlayer modulated in real time. Lock fires a separate one-shot pattern over the top — no clicks, just texture.
AVAudioEngine with per-generator sine voices and a silent harmonic chord that arms on lock. All sample-accurate, no recorded audio.
Standard, Soft, and Calm — one-tap profiles that re-tune motion, haptics, and audio together. Per-channel sliders for fine-grained control.
Shallows, Open Ocean, The Deep. Calmer fields to begin, deeper layered interference as you drift. No level select — you just keep going.
The field teaches through feedback alone. No tutorial text, no menus mid-session, no notifications. Language-agnostic by design.
No accounts. No servers. No analytics SDKs. Nothing leaves your device. The app runs in airplane mode exactly the same as online.
Sorvelin is free on the App Store. No subscriptions, no in-app purchases, no advertising. The whole field is yours.
Two generators, slow dynamics, a single node with a strong gradient. The field practically pulls you toward resonance. A good place to learn what locking feels like.
Three or four generators, moderate dynamics, two or three nodes scattered. Interference patterns interfere — your finger has to choose which peak it's drawn toward.
Four or five generators, fast dynamics, weak gradient, nodes that drift. The field rarely sits still. Locking here is an act of attention, not technique.
Sorvelin is free on the App Store. iPhone and iPad, iOS 26.5+. No account, no ads, no purchases.