Sidetone
Mumble Client
Free · Designed for iPad. Not verified for macOS.
Sidetone is a Mumble client for iPhone built around listening.
Most voice apps give you one room. Sidetone gives you a mix: you join one channel — that sets where your voice goes — and then listen to as many other channels as you like, each with its own level, mute and left/right placement. Dispatch on the left, your own team centred, the wider net low and to the right. You can tell them apart by ear instead of by reading the screen.
Talking is deliberate. Talk targets are held, not tapped, so nothing goes out by accident.
THE LISTEN MIX
• Join one channel, listen to any number of others
• Per-channel volume, mute and stereo placement
• Mute individual people without leaving the channel
• Live level meters show who is speaking
HOLD TO TALK
• Up to eight talk slots, each aimed at a channel, a person, or everyone you are listening to
• Push-to-talk, or voice activity with an adjustable threshold
• Double-tap to latch a slot open; tap again to close
• Optional haptics and spoken confirmation of the target
• The rest of the mix ducks while you speak
BUILT TO BE LEFT RUNNING
• Live Activity on the lock screen and in the Dynamic Island: server, who is talking, transmit state
• Carries on in the background and reconnects by itself, with a tone or a spoken cue when the link drops or returns
• Remembers per server: joined channel, listen channels, levels, placement, muted people
• Five accent colours, light and dark
STANDARDS, NOT A SERVICE
• Connects to any Mumble or murmur server — your own, or your team's
• TLS control channel, OCB2-encrypted voice, Opus at 48 kHz
• A client certificate is generated on your device so servers can register you
• No account, no sign-up, no analytics, no third-party SDKs
There is no Sidetone server. Your audio goes to the server you choose and nowhere else.
You need access to a Mumble server to use Sidetone. Sidetone is an independent client and is not affiliated with or endorsed by the Mumble project; portions of the protocol implementation are derived from Mumble under the BSD 3-clause licence, reproduced in the app under Setup → About.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Improved audio controls
- Increased touch controls usability
- Media MTX support
The developer, Stephen Markham, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Stephen Markham
- Size
- 2.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Stephen Markham