Frequency Generator: Tone Hz

Tone Generator is an audio frequency generator, sine wave oscillator, and signal generator for Android. Generate pure tones from 1 Hz to 22 kHz with sine, square, sawtooth, and triangle waveforms, frequency sweep, and dual-tone output — replace expensive lab equipment with the phone you already carry.

▶ MAIN FEATURES

• Sine, square, sawtooth, and triangle waveforms

• Full 1 Hz – 22 kHz frequency range with 0.1 Hz precision

• Frequency sweep mode (rises or falls over time)

• Dual-tone and stereo output with independent channels

• Adjustable volume and left/right balance

• Precise frequency entry by slider or number

• Function generator and signal generator in one app

• Speaker, subwoofer, and hearing test tones

• Dark mode for studio and night use

• Works fully offline — no internet required

▶ HOW TO USE

1. Pick a waveform (sine gives the cleanest pure tone).

2. Set the frequency with the slider or type an exact value (e.g. 440 Hz).

3. Adjust the volume to a safe, moderate level.

4. Tap Play — the tone outputs instantly.

5. Use sweep or dual-tone mode for response and channel testing.

▶ WHO USES TONE GENERATOR

• Audio and AV engineers calibrating systems

• Musicians and instrument tuners working to exact Hz

• Speaker and subwoofer testers checking drivers

• Electronics hobbyists testing circuits and filters

• Science and physics students exploring sound and frequency

• Hearing-range testers generating reference tones

Use a moderate volume to protect your hearing and your speakers — high-frequency tones at high levels can cause damage. Start low and increase gradually.