Short answer: a mobile app with core features ships in 4 to 6 weeks, a store or booking app with online payment and an admin panel in 8 to 12 weeks, and apps that integrate with existing systems or carry several user roles in up to 16 weeks.
These are real delivery times using Flutter, one codebase running on both iOS and Android, covering design, development, testing and publishing to both stores. Below is each phase, its duration, and what actually stretches a timeline.
Phase-by-phase timeline
| Phase | Duration | What is delivered |
|---|---|---|
| 1. Scope and screens | 3 to 5 days | Screen list, features and user roles, signed off in writing |
| 2. UI design | 5 to 10 days | Every screen designed in the client's brand, editable before coding |
| 3. Backend and database | 7 to 14 days | Database, APIs and admin panel |
| 4. App development | 10 to 25 days | Installable test build at the end of every two weeks |
| 5. Payments, notifications, integrations | 4 to 8 days | Payment gateway, push notifications, any existing-system integration |
| 6. Testing and fixes | 4 to 7 days | Testing on real devices, bug report and fixes |
| 7. Store submission | 2 to 5 days + store review | Published on the App Store and Google Play |
Phases overlap: development starts before the last screen is approved, so the total is shorter than the sum of the parts.
Why Flutter instead of two separate apps
Two native apps means two teams, two codebases, two test cycles and every bug fixed twice. With Flutter we write one codebase that runs on both platforms with near-native performance, cutting roughly 35% to 45% off the timeline and the same off long-term maintenance, because each change is made once.
What actually stretches the timeline
- Late content: copy, images and product data from the client. This is the number-one cause of delay.
- Requirement changes after kickoff: adding a screen or a user role mid-development reopens earlier phases.
- Payment gateways and store accounts: merchant activation and store review sit outside the development team's control.
- Integrating an existing system: how well the client's accounting or inventory APIs are documented decides between one week and three.
How we work with agencies
Most agencies in the Gulf have a client asking for an app and no in-house development team. We build that part white label: delivery under the agency's name, no contact with your client, full source code handed over. You get a written phase timeline you can drop straight into your own proposal.
Before any financial commitment we offer a free technical review of your first request: send the app idea and we return a written scope, timeline and cost within 24 hours.
Read next
- When is a mobile app a real investment, not an expense?
- How to choose a software company you will not regret
- Case study: the KiddyTop platform
FAQ
How long does it take to build a mobile app from scratch?
4 to 6 weeks for core features, 8 to 12 weeks for a store or booking app, up to 16 weeks when integrating existing systems.
Is store publishing inside that timeline?
Yes, but App Store review adds one to seven days outside our control; Google Play is usually under three days.
Does building for both platforms double the time?
No. One Flutter codebase runs on both and saves roughly 35% to 45%.
Do we see the app before final delivery?
Yes, an installable build at the end of every phase, roughly every two weeks.
Can you build under our agency's name?
Yes, delivery under your name, no contact with your client, full source code handed over.
Get started
Send us the app idea, even a rough one, and you get a written scope, timeline and cost within 24 hours. Contact us.
Money Leek Software Development
Phone +20 122 066 3807
WhatsApp +20 100 044 6359
sales@moneyleek.online