Use a Gantt chart to plan your mobile app launch. Coordinate development, QA, app store submission, marketing, and launch day across iOS and Android with one shared timeline.
Mobile app launches have a structural problem that web launches don't: the app store review process. iOS review takes 1–7 days (longer if you're rejected). Google Play is typically faster, but not instant. If your marketing campaign is scheduled to go live the day after submission, any review delay pushes the entire launch.
A Gantt chart solves this by making the review window explicit in the timeline. When the marketing team can see that submission happens on Day X and review takes 3–7 days, they stop scheduling launch-day emails for Day X+1.
This guide walks through building a mobile app launch Gantt chart that coordinates development, QA, app store submission, and marketing in a single timeline.
| Phase | Work | Dependency | Typical Duration |
|---|---|---|---|
| Feature completion | Final feature development | None | Varies |
| Internal QA | Bug testing, device testing | Feature complete | 1–2 weeks |
| Beta testing | TestFlight / Firebase, user feedback | Internal QA passed | 1–2 weeks |
| App store assets | Screenshots, descriptions, metadata | Beta started | 1 week |
| Submission | Upload builds, submit for review | Beta complete + assets ready | 1 day |
| Review window | Apple/Google review | Submission | 3–7 days (buffer 7) |
| Marketing prep | Content, emails, social scheduling | None (parallel) | 2 weeks |
| Launch day | Approve release, trigger campaign | Review approved | 1 day |
| Post-launch monitoring | Crash rates, ratings, support | Launch | 2 weeks |
The review window is the critical uncertainty. Always buffer 7 days even if average review is 2 days. Rejections restart the clock.
Work backward from your target launch date. Add the review buffer (7 days), then beta testing (2 weeks), then internal QA (1–2 weeks). That gives you the latest date feature development can complete.
If feature development won't be complete by that date, the launch date needs to move — not the QA buffer.
Open gantt-chart.io and pin your launch date as a milestone. Build everything backward from it.
Mobile launches often have iOS and Android tracking separately — different submission timelines, different review processes, different build tools.
Create two swim lane sections: iOS and Android. Duplicate the phase rows in each. iOS typically needs more buffer for review; Android can often move faster.
Draw dependency arrows:
These arrows are non-negotiable. If you try to run QA and feature development simultaneously on the same features, you'll be retesting every day.
Marketing prep — copywriting, App Store screenshots, social content, email sequences — can run in parallel with beta testing. It doesn't need to wait for QA to complete.
Add a "Marketing" swim lane with tasks starting as soon as the beta period begins. The one constraint: no marketing can go live until review is approved.
Set a dependency arrow from "Review approved" to "Marketing launch." This prevents the launch email from going out before the app is actually available in the stores.
Post-launch is not "done." Add 2 weeks of monitoring tasks: crash rate tracking, App Store rating response, user feedback review, hotfix readiness.
Putting this in the chart signals to leadership that the team is not immediately available for new feature work the day after launch.
Not buffering review time. The most common launch delay in mobile. Plan for 7 days, communicate it explicitly, and don't let anyone schedule a launch-day event until review is confirmed.
Coupling marketing dates to submission dates. Submission and launch are not the same event. Marketing should be ready to fire the moment review is approved, not scheduled for a specific date.
Running QA and feature development simultaneously. If engineers are still committing to main while QA is testing, the test results are invalid. Lock the branch before QA starts.
Ignoring Android/iOS differences. iOS has stricter guidelines, more reasons for rejection, and variable review times. Android is generally faster but has its own rejection triggers (especially around permissions). Treat them as separate timelines on the chart.
No beta period. Shipping directly from internal QA to public launch misses an entire class of real-device, real-network issues. Even a 3-day TestFlight beta with 10 users finds things internal QA doesn't.
Development
Feature Completion |████████░░░░░░░░|
iOS
Internal QA |░░░░░░░░████░░░░| → feature complete
Beta (TestFlight) |░░░░░░░░░░██░░░░| → internal QA
App Store Assets |░░░░░░░░░░██░░░░| (parallel to beta)
Submission |░░░░░░░░░░░░█░░░| → beta + assets
Review Window (7d buffer) |░░░░░░░░░░░░░███| → submission
Android
Internal QA |░░░░░░░░████░░░░| → feature complete
Beta (Firebase) |░░░░░░░░░░██░░░░| → internal QA
Play Store Assets |░░░░░░░░░░██░░░░| (parallel to beta)
Submission |░░░░░░░░░░░░█░░░| → beta + assets
Review Window (3d buffer) |░░░░░░░░░░░░░░█░| → submission
Marketing
Content + Assets |░░░░░░░░░░████░░| (parallel to beta)
Email / Social Scheduled |░░░░░░░░░░░░░░░░| on hold until review ◆
Milestone: Beta Launch Week 5 ◆
Milestone: Submission Week 7 ◆
Milestone: Launch Day Week 8 ◆Build your mobile launch timeline in gantt-chart.io. Start with your target launch date as a milestone and work backward. Add the review window buffer before you schedule anything in marketing.