Start a project

video calling apps

Video Calling App Development

One-to-one and group video calls, voice rooms and in-app calling for Android, iOS and the web, built by the team behind Gravix Cloud.

Start a ProjectSee our work

Why teams choose us

Video calling app development is where real-time products win or lose users. Calls have to connect fast, stay clear on weak mobile networks and feel natural on every device. We have shipped calling, voice rooms and live streaming for clients for years, and we make our own real-time platform, Gravix Cloud, so we know these problems first-hand.

We build the whole product around the call: the Flutter, native or web app, sign-in and contacts, ringing and push notifications, in-call chat and screen share, camera looks, and the admin tools your team uses afterwards. Use Gravix Cloud, or keep the calling provider you already have. We will tell you plainly which one fits your scale and budget.

What's included

  • Video call app development

    One-to-one and group calls with screen share, chat and recording, on mobile and the web.

  • Voice calls & audio rooms

    Audio-first rooms with hosts, speakers and listeners that stay clear when the room fills up.

  • Ringing, push & call history

    Incoming-call screens, push notifications and missed calls that behave like the phone's own dialler.

  • Beauty filter & camera looks

    Real-time beauty presets on camera, free with Gravix Cloud on Android and the web, or the filter you already use.

  • Secure access

    Every join needs a short-lived token from your own server, so only your users get into a call.

  • Honest provider advice

    Gravix Cloud, another provider, or a move between them: we help you choose and build on whichever you pick.

The stack

Full-stack, one team — designed in Figma, built in Flutter & Go, run in production. No hand-offs to strangers.

  • Flutter
  • Android
  • iOS
  • Web
  • Gravix Cloud
  • Go
  • PostgreSQL
  • Firebase

Fixed timelines, visible progress

  1. Discover

    We map the call flows, the devices your users have and the networks they call from.

  2. Design

    Figma prototypes of the ringing, in-call and after-call screens, approved before code starts.

  3. Build

    SDK integration, call screens, notifications and admin tools, shipped in two-week sprints.

  4. Launch & support

    Testing on real devices and networks, a watched launch, then the next features together.

Questions, answered

Should we use Gravix Cloud or another provider?
Either can work. Gravix Cloud is our own platform, and we also build on the provider you already use. We compare cost, features and support for your use case before you commit.
How many people can join a call?
It depends on the call type and the plan. Tell us your expected group and audience sizes and we will plan the product around them.
Can you add video calling to an existing app?
Yes. We add calling to existing Flutter, iOS, Android and web apps without rebuilding them, using the calling SDK for each platform.
Are the calls private?
With Gravix Cloud, audio and video are encrypted in transit and every join needs a token that your own server signs. With other providers we set up the equivalent controls they offer.
Do you support the app after launch?
If you want, we do: monitoring, fixes, new features and store releases.

Ready to add calling to your app?

Tell us about your project — we'll reply with a plan, a timeline and a straight answer.

Start a projectChat on WhatsApp (opens in a new tab)