hactools.

OtoSignal OtoMoji Hz / AndroidTurn typed text into sound
and send it to nearby phones

You can also exchange messages at high pitches that many people find hard to hear.

AndroidText and voicePassphraseFree (with ads)
Coming soon to Google Play

Package: com.hac.otosignal.otomoji / Developed and published by HacTools

The messaging screen while receiving
Main features

Send as a sound signal

Short messages are sent as sound. Longer messages are split and joined back together on the receiving side. Several people can join in.

Choose the pitch

Pick from high pitches that many adults find hard to hear, a soft low sound, or an ordinary audible sound.

Passphrase

Messages are encrypted so that only people with the same passphrase can read them.

Send by voice

Send a read-aloud voice. You can also choose the voice pitch and reading speed.

Quick phrases

Send phrases like "OK" or "Good work" with one tap. You can add your own.

Screenshots
Messaging screen
Messaging
Choosing the sound type
Sound type
Name and passphrase
Name & passphrase
Choosing the voice type
Voice type
Making your own voice
Make your own voice
The range this phone can play
Pitch range
Please note
Coming soon to Google Play

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