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★★★★★
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Major update! New breathing guide, ambient visuals, waveform picker, and a completely redesigned player experience.
Tone Flow is a precision frequency generator with 80+ curated tones across 12 categories, designed for sound wellness, meditation, relaxation, and audio calibration. FEATURES - 80+ Frequencies — Solfeggio, Schumann resonance, Chakra, Angelic, Planetary, Sacred geometry, Rife, Otto tuners, Harmonic, Therapeutic, and more - Multiple Waveforms — Sine, Square, Triangle, and Sawtooth for different tonal qualities (Pro) - Custom Frequencies — Create and save your own tones from 1 Hz to 25,000 Hz - Favorites — Quickly access your most-used frequencies - Background Playback — Keep tones playing while using other apps - Lock Screen Controls — Play, pause, and see what's playing from your lock screen - AirPlay Support — Stream to external speakers and devices - Built-in Sound Therapy Guide — Learn about each frequency category and how to use them FREQUENCY CATEGORIES - Solfeggio (174–1174 Hz) — Ancient tones used in wellness practices - Schumann Resonance (7.83–93.96 Hz) — Earth's natural electromagnetic frequencies - Chakra (126–272 Hz) — Tones associated with energy centers - Angelic (111–999 Hz) — Sequences used in spiritual practice - Planetary — Frequencies derived from planetary orbits - Sacred Geometry (108, 432, 864 Hz) — Tones rooted in mathematical harmony - Otto Tuners (8–128 Hz) — Earth-based grounding tones - Rife (20–1550 Hz) — Frequencies used in complementary wellness - Harmonic — Just intonation scale with pure mathematical ratios - Modern — Standard equal temperament tuning (A4 = 440 Hz) - Therapeutic — Biosonics and Fibonacci-based frequencies PRECISION AUDIO Every tone is generated in real-time with ±0.01 Hz accuracy using a professional audio engine. Smooth fade-in and fade-out prevent clicking or harsh transitions. PRO UPGRADE Unlock all four waveform types, unlimited favorites, and an ad-free experience with a single one-time purchase. No subscriptions. Note: Tone Flow is designed for wellness, relaxation, and educational exploration. It is not a medical device and does not diagnose, treat, or cure any condition.