Teacher Mic: Class Speaker

Teacher Mic: Class Speaker turns your phone into a voice amplifier for the classroom. Talk at a normal level and your voice comes out live through the phone speaker, a Bluetooth speaker or a wired speaker, tuned for clear speech so the back row hears every word.

A CALMER VOICE FOR LONG LESSONS
• Clear voice is on from the start: it trims rumble and lifts speech
• Gain from -6 to +24 dB with input and output meters
• Keep voice level and Even out volume hold your voice steady as you move
• Noise gate mutes the mic between words so fan hum stays out
• Feedback guard (Gentle, Balanced, Aggressive) stops the squeal early
• Tone presets: Flat, Voice, Bass boost, Bright, Karaoke
• 10-second quick setup suggests gain, noise gate and Clear voice
• Tap on/off or hold-to-talk, a Quick Settings tile, and it keeps running with the screen off

SPEAKERS AND MICS
• Automatic output prefers a connected Bluetooth speaker, or pick phone, wired/USB or Bluetooth
• Keep speaker awake, a speaker delay test and per-speaker settings
• Mutes if the speaker disconnects
• Pick the phone, headset or USB mic; a wired headset mic works as a clip-on mic
• Lowers other apps' music while you talk

BELLS AND ANNOUNCEMENTS
• A big chime button; Door chime and School bell are free
• Bell schedule by time and day (2 bells free) while the mic is on
• Type a short message and the phone reads it aloud
• Record a short message and play it back
• Queue caller and an All clear emergency message

RECORD THE LESSON
• Tap Record to save what comes out of the speaker as a WAV file
• Play, share or save to your Music folder; the last 10 recordings are kept
• Free recordings last up to 60 seconds

CLASSROOM TOOLS
• Class noise: while the mic is muted, a level bar shows how loud the room is and can ring a chime when the class stays noisy
• Random name picker: paste your class list, call each student once per round, skip absent ones and read the name aloud
• Say the time, or announce it every hour while the mic is on
• Days off: scheduled bells stay silent on holidays
• Speech timer that buzzes at 1 minute left and when time is up
• Soften sudden loud sounds such as door slams or dropped objects
• Scenes: Small class, Hall, Outdoor or Phone speaker only in one tap

PREMIUM
• Unlimited sessions (free sessions end after 10 minutes) and no ads
• Echo, Karaoke, Hall and Stadium; Megaphone, Walkie-talkie, Robot and Alien voices
• Sirens, extra chimes, Evacuate and Lockdown messages
• Custom bass, mids and treble; longer spoken messages and 10 saved phrases
• Recorded messages that repeat; recordings up to 30 minutes with M4A export
• Monthly, yearly or lifetime, paid through Google Play

Free users see ads. Watching a rewarded ad opens every Premium feature for 30 minutes.

WHO IT'S FOR
Teachers and lecturers, tutors and coaches, tour guides, presenters and trainers.

HOW TO START
1. Connect a speaker and set its volume low
2. Tap the mic and talk normally
3. Raise the gain until the back of the room hears you
4. Keep the phone a little away from the speaker

GOOD PRACTICE
Turn up step by step and keep loud speakers away from ears. Tell people when you are recording, and never use the app to listen in on others.

QUESTIONS
Does the teacher microphone need internet? No, live amplification runs on the phone.
Why does it squeal? The mic hears the speaker. Place the speaker in front of you, facing away, and lower the gain.
Is there a delay on Bluetooth? Often 0.1–0.3 s. Wired speakers have the lowest delay.

PRIVACY
Live audio is processed on the phone and not sent anywhere. Audio is saved only when you tap Record or record a message, and the files stay on your phone unless you share them. Spoken messages use your phone's text-to-speech engine. Firebase Analytics and Crashlytics help us understand usage and fix crashes (switch them off in Settings). Ads in the free version use your device's advertising ID.