What Aria actually does
The full feature list, and the honest limits of each one.
Wideband audio, real codecs
Opus up to 48 kHz where both ends support it, G.711 everywhere else. The RTP engine is ours, so the jitter buffer and resampling are tuned for voice rather than inherited from a general-purpose media stack.
- Opus codec support (up to 48kHz)
- G.711 µ-law and A-law
- Adaptive jitter buffer
- Sample rate conversion
Encrypted in transit
TLS secures signalling, SRTP encrypts media using AES-128-CM with HMAC-SHA1-80, and credentials are stored in your system keychain rather than in plain text. Keys are exchanged in the SDP (SDES), so media is encrypted between Aria and your server — this is transport encryption, not end-to-end encryption.
- TLS transport for SIP signalling
- SRTP with AES-128 encryption
- Secure credential storage
- No data sent to third parties
Never Miss a Detail
Record calls with a single click or enable auto-recording for all calls. Recordings are saved locally in high-quality WAV format, giving you full control over your data.
- One-click recording during calls
- Auto-record option per account
- Local storage - you own your data
- Easy playback from call history
All Your Lines, One App
Manage multiple SIP accounts effortlessly. Switch between work, personal, and client accounts with a single click. Each account maintains its own settings, history, and preferences.
- Unlimited SIP accounts
- Quick account switching
- Per-account settings
- Separate call histories
Native Mobile Apps
True native apps for iOS and Android, powered by the same Rust SIP and RTP engine as the desktop. Calls wake your phone instantly via push notifications and show up in the native call UI.
- CallKit integration on iOS (lock screen, Siri)
- Android ConnectionService with native call UI
- VoIP push via APNs and FCM
- Contacts integration on both platforms
- Shared Rust core via UniFFI bindings
Self-Hosted Push Gateway
The Aria Push Gateway is a lightweight SIP B2BUA that sits between your PBX and mobile devices. It maintains SIP registrations on behalf of phones, intercepts incoming INVITEs, and delivers instant VoIP push notifications. Outgoing calls route through the gateway too.
- Maintains SIP registrations for mobile devices
- Delivers APNs (iOS) and FCM (Android) push
- B2BUA for outgoing call origination
- REST API for device registration and call signaling
- SQLite storage, ~256MB RAM, runs anywhere
The rest of it
Smaller things that matter once you use it every day
Every Platform
Desktop on macOS, Windows and Linux; iOS and Android in testing
Contact Management
Import from system contacts on desktop and mobile, add favourites
Call History
Full history with search, filtering, and one-click callback
Push Notifications
Instant call delivery via APNs and FCM, even when the app is closed
Beautiful UI
Modern interfaces — React on desktop, SwiftUI on iOS, Compose on Android
Open Source
Free for non-commercial use — inspect, modify and build it yourself
Point it at your SIP account
Download now and start making crystal-clear calls in minutes.
Download Aria