# Tone Flow: Sound Therapy — Sound Frequency Generator

> Precision sound frequency generator for wellness, meditation, and audio calibration. (iPhone/iPad app by Ocean Path Ventures LLC.)

- Source: https://appshunter.io/ios/app/tone-flow-sound-therapy/id6758593023 (this page in markdown: same URL + `.md`)
- Developer: [Ocean Path Ventures LLC](https://appshunter.io/developer/1873678642)
- Category: Utilities, Health & Fitness
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-02-12
- Data updated: 2026-06-11
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/tone-flow-sound-therapy/id6758593023/reviews.md

## What is Tone Flow?

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.

## Key features

- 80+ curated sound frequencies
- Multiple waveform options (Pro)
- Custom frequency creation
- Background playback
- Lock screen controls
- Sound therapy guide

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| ToneFlow Pro | $4.99 | one-time |



## Frequently asked questions about Tone Flow

### What is Tone Flow?

Tone Flow is a precision frequency generator app that offers over 80 curated tones across 12 categories for sound wellness, meditation, relaxation, and audio calibration. It features real-time generation with ±0.01 Hz accuracy.

### What types of frequencies does Tone Flow offer?

Tone Flow includes categories like Solfeggio, Schumann Resonance, Chakra, Angelic, Planetary, Sacred Geometry, Rife, Otto Tuners, Harmonic, Modern, and Therapeutic frequencies, totaling over 80 distinct tones.

### Can I create my own frequencies in Tone Flow?

Yes, Tone Flow allows you to create and save your own custom tones ranging from 1 Hz to 25,000 Hz. This feature enhances the personalization of your sound therapy experience.

### What are the Pro features in Tone Flow?

The Pro upgrade unlocks multiple waveform types (Sine, Square, Triangle, and Sawtooth), unlimited favorites, and an ad-free experience. This is offered as a one-time purchase, not a subscription.

### Does Tone Flow support background playback?

Yes, Tone Flow supports background playback, allowing you to continue listening to tones while using other applications. It also features lock screen controls for easy management.

### Is Tone Flow available on multiple devices?

Tone Flow is currently supported on iPhone and iPad devices, making it accessible for users within the Apple ecosystem. The app was last updated on February 16, 2026.

### What is the age rating for Tone Flow?

Tone Flow has an age rating of 4+, making it suitable for a wide range of users interested in sound therapy and relaxation. The app is designed for wellness and educational exploration.

### How accurate is the frequency generation in Tone Flow?

Tone Flow generates every tone in real-time with a precision of ±0.01 Hz using a professional audio engine. This ensures high accuracy for all generated frequencies.

## Version history (last 2 releases)

### 1.1 — 2026-02-16

Major update! New breathing guide, ambient visuals, waveform picker, and a completely redesigned player experience.

### 1.0 — 2026-02-13

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*