Short answer: a marketing or advertising agency can sell iOS and Android apps to its clients without hiring a dev team, by using a white-label partner that builds the app in Flutter under the agency's brand, hands over the full source code, and is paid in milestones tied to clear deliverables.
This model fits agencies whose clients keep asking for apps but who do not want fixed developer salaries for irregular demand.
Why Flutter for agency client apps?
- One codebase, two platforms: iOS and Android from the same code, so less time and lower maintenance.
- Pixel-faithful UI: what the client approves in Figma ships almost exactly as designed.
- Faster changes: new colors, screens or content do not mean rebuilding two apps.
- Near-native performance: fine for stores, bookings, loyalty and service apps.
How white-label development works
- The agency sends the brief: the client idea, requirements, or Figma designs if any.
- Written proposal within 24 hours: scope, timeline, cost and payment milestones, so the agency can quote its client with confidence.
- Built under the agency's name: no contact with the client unless requested, and our name never appears in the app.
- Milestone delivery: screens first, then a test build, then the final release.
- Publishing and maintenance: App Store and Google Play release prep, plus an optional monthly maintenance contract.
What the agency receives
- A Flutter app running on iOS and Android.
- A web admin panel and API (usually Laravel) for content, orders and users.
- Full source code in a Git repository under the agency's or client's name, with setup docs.
- Payment gateway, push notifications and maps integration as needed.
How long does it take?
A basic app usually takes 4 to 6 weeks; an app with a store or bookings and online payment takes 8 to 12 weeks. More in how long mobile app development takes and how to estimate software project cost.
When this model is not for you
If the agency already has a fully booked in-house app team, or the app depends on rare OS features that need pure native code. Otherwise, a white-label partner costs less than hiring for irregular demand.
FAQ
Why do agencies choose Flutter for client apps?
Flutter builds the iOS and Android apps from one codebase, which cuts build time and maintenance cost compared with two separate native apps, while keeping near-native performance and UI.
Will our client see your name as the developer?
No. In white-label work the team operates fully under the agency's brand, never contacts the agency's client unless asked, and publishes on the client's or agency's store accounts.
Who owns the source code after delivery?
The agency or its client owns the full source code. It is delivered in a Git repository under their name, with setup docs, the admin panel and the API.
How long does a Flutter app for an agency client take?
A basic app usually takes 4 to 6 weeks, and an app with a store or bookings plus online payment takes 8 to 12 weeks. The final timeline is set in a written proposal after reviewing the requirements.
How do payment and delivery work?
Payment is split into milestones tied to clear deliverables: screen designs, a test build, then the final version and store release. The agency never pays for a milestone before seeing it work.
Does the service include an admin panel and store publishing?
Yes. We build the admin panel and API, usually with Laravel, prepare the app for the App Store and Google Play, and offer an optional monthly maintenance contract after delivery.
Read also
White-label development partner for agencies, how to choose a software company and our mobile app development service. For a written proposal: contact us.
Anything custom your client has in mind, we can build it exactly as you picture it.