iOS & Android
Lubb Softphone
Your phone system, in your customers' pockets. The complete iOS and Android calling app — sign-in provisioning, full in-call controls, push and in-app top-ups. Licensed once, published under your own brand, on your own developer accounts.
A Real Calling App
Dialer, contacts, favourites, call history and full in-call controls — the app your customers actually make calls on, not a demo.
Your Brand, Your Stores
Swap the name, bundle ID, icon and palette, publish under your own Apple and Google developer accounts.
Calling Engine Included
The commercial SIP engine licence for your own build is arranged and included in the fee — nothing else to buy.
Own It Outright
One licence fee, once. No per-seat fee to us, no monthly platform charge, ever.Everything a calling app needs, already built
Not a starter template — every one of these is in the source you receive, running today against a live phone system.Zero-touch provisioningA user signs in and the app pulls their extension, password, SIP server and caller ID straight from your platform. Nobody types a SIP setting, ever.
QR-code sign-inScan a code to hand an extension to a phone in seconds — the fastest way to onboard a team that has never seen a softphone.
Full in-call controlsHold, mute, speaker, call transfer with its own keypad, DTMF tones, and proximity blanking so a cheek never ends a call.
Contacts, favourites & historyThe phone’s own address book with multi-number contacts, a favourites tab, and a searchable inbound / outbound / missed call log.
Push, even when closedIncoming calls arrive as push notifications with a ringtone, registered against your own phone system — the app doesn’t have to be open.
Forwarding & call blockingForward-all, forward-on-busy and forward-on-no-answer, plus a blocked-numbers list, all driven from the user’s own account.
In-app top-upsBuy airtime inside the app through both stores’ in-app purchase rails, with a PayFast web checkout path alongside for card payments.
Sign-up & OTP verificationSelf-service registration with SMS one-time-pin verification and account cancellation — the whole lifecycle, not just the login screen.
Deep SIP settingsCodecs, DTMF mode, transport, STUN / ICE, keep-alive intervals, custom DNS and dial plans — everything a network engineer asks for on day two.
Zero-Touch Provisioning
From install to first call, without a single SIP setting
The reason a softphone rollout usually stalls is the setup screen — servers, ports, transports, passwords. This app doesn't have one. It asks your platform who the user is and configures itself.01Sign in, or scanThe user enters their number, or scans a QR code you generate. An SMS one-time pin confirms it’s them.
02The extension arrivesYour platform answers with the extension, password, SIP server, caller ID and forwarding rules. The app registers itself.
03They’re on the phone systemTheir mobile is now an extension — same number, same routing, same call history as the desk phone they left behind.
Source Code License
Own the app outright
A one-time, non-exclusive licence to the complete Lubb Softphone source — everything on this page, both platforms, and the commercial calling engine licence for your own build. Ship it to as many customers as you like. No per-seat fee to us, ever.27 500+
Lines of Dart, already written and shippingiOS + Android
Both apps, from one Flutter codebase200+
Signed CI builds behind it — a shipping app, not a prototypeIncluded
The commercial SIP calling engine licence for your build| Source Code License | Full Source Code LicenseLubb Softphone — Full Source Code LicenseOwn the entire Lubb Softphone app outright — the complete iOS and Android calling app that turns any phone into an extension on your phone system. Full source code, the commercial SIP engine licence for your own build included, and the right to brand it, publish it under your own developer accounts and ship it to as many customers as you like. Non-exclusive: you get the codebase and the right to run and white-label it, and Lubb keeps shipping its own app alongside you. | Deployment & HandoverLubb Softphone — Deployment & HandoverOptional once-off service: we build and publish the app under your own brand on your own Apple and Google developer accounts, point it at your phone system, and hand over to your team fully trained. Not required — the licence includes full build and deployment documentation if you'd rather ship it yourselves. |
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R100 000each | R20 000each | |
| What's included | ||
| Complete Flutter source — one codebase building both the iOS and the Android app | — | |
| Commercial SIP engine licence for your own build, arranged and included in the fee | — | |
| Non-exclusive licence — publish under your own developer accounts, under your own brand | — | |
| Unlimited end users and extensions on your own installation | — | |
| Zero-touch provisioning — a user signs in and the app pulls their extension, password, server and caller ID | — | |
| QR-code sign-in for handing an extension to a phone in seconds | — | |
| Full in-call controls: hold, mute, speaker, call transfer, DTMF keypad and proximity blanking | — | |
| Native dialer, device contacts, favourites and call history | — | |
| Call forwarding and call blocking driven from the user's own account settings | — | |
| Push notifications for incoming calls, with the push-registration service included | — | |
| In-app airtime top-ups through both app stores, plus a PayFast web checkout path | — | |
| Sign-up, SMS one-time-pin verification and self-service account cancellation | — | |
| Advanced SIP settings: codecs, DTMF mode, transport, STUN/ICE, keep-alive, DNS and dial plans | — | |
| Built to ship | ||
| Flutter 3 / Dart with BLoC state management, dependency injection and generated models | — | |
| 27 500+ lines of Dart across 236 files, plus the native iOS and Android integration | — | |
| CI pipelines that build, sign and publish to Google Play and App Store Connect | — | |
| White-label ready — app name, bundle ID, icons, splash screen and colour palette in one place | — | |
| Backend API contract documented, so you can point it at your own phone system | — | |
| 90 days of source updates and handover support | — | |
| What deployment & handover covers | ||
| White-label build: name, bundle ID, icon and palette | — | |
| Publishing to your own App Store and Play Store accounts | — | |
| Connecting the app to your phone system and push credentials | — | |
| Handover training for your technical team | — | |
| Two weeks of post-launch email support | — | |
How the handover worksSigning the licence is the start, not the end. This is what the weeks after look like — no charge on top, it's what the licence fee covers.
No VAT is charged — Lubb is not a registered VAT vendor. Non-exclusive licence: you may publish and white-label the app freely, and so may other licensees — nothing here is exclusive to one buyer. Apple and Google developer accounts, and your own hosting, stay in your name.Licence agreement signed, and the commercial SIP engine licence raised in your name
Private repository access, with the backend API contract documented
Your app name, bundle IDs, icons, splash screen and colour palette swapped in
Your Apple and Google developer accounts wired into the build pipelines
First signed build in your hands, and 90 days of source updates and support
Goes With
Need the phone system behind it too?
Lubb PBX — the multi-tenant platform this app was built against — is licensed the same way: source code, once-off, run it on your own infrastructure. Take both and you own the whole stack, switch to handset.See Lubb PBX
Ready to own it?
Tell us how you plan to ship it — your own network, your own customers — and we'll walk you through the licence and get you the source.Request This License