Plan a mobile app launch with a Gantt chart covering discovery, iOS/Android dev, QA, App Store review timelines, ASO, and post-launch monitoring.
Mobile app launches have a deceptive structure. The development work feels like the whole project — design, build, test — but the actual launch involves a second set of dependencies that most teams don't schedule rigorously. App Store review takes 24 to 48 hours for Apple and up to 7 days for Google. Marketing assets (screenshots, preview videos, app descriptions) need to be produced and reviewed before submission. Beta testing needs to close and feedback needs to be actioned before you submit for review. ASO (App Store Optimization) copy needs to be written, localized if you're launching in multiple markets, and approved.
Every one of these is a real task with a real duration and a real dependency on something before it. A Gantt chart makes all of them explicit — and makes it nearly impossible to accidentally submit to the App Store two weeks after your planned launch date because someone forgot to start the screenshot production.
Before a line of code is written, the project needs clear scope, validated assumptions, and a technical foundation.
Key tasks:
The scope sign-off milestone is a gate. Design cannot start until scope is approved. Make this explicit on the Gantt — design tasks have scope sign-off as a dependency.
Design and development often want to overlap, but design must lead — developers need finalized screens to build from.
Design Gantt tasks:
The design handoff milestone gates development start. If developers start before design is final, they'll rebuild screens. Some overlap is acceptable for non-UI work (API integration, data layer), but screen implementation must wait for final design.
If you're shipping to both platforms, iOS and Android development run as parallel Gantt tracks. Each has its own developers, its own build, its own release artifacts.
Per-platform Gantt structure:
Show iOS and Android as separate swimlanes. Where they depend on the same backend API endpoint being ready, draw that dependency explicitly — both platform tracks have a successor relationship to the API completion milestone for that feature.
Backend development is a third parallel track, often the constraint that determines platform development pace.
Backend Gantt items:
The API spec, delivered early in this track, lets iOS and Android developers mock backend responses and build UI without waiting for the real backend. When the real backend is ready, they swap the mock for the live implementation. This reduces the sequential dependency and shortens the overall timeline.
QA runs in two forms: ongoing throughout development (developers test their own work) and a structured QA phase at the end of development.
Structured QA Gantt tasks:
The QA sign-off milestone gates beta testing. Don't send a bug-laden build to beta testers — you'll exhaust their goodwill on issues your team should have caught internally.
Beta testing with real users catches issues no internal team ever finds.
Beta testing Gantt:
Manage beta recruitment on the Gantt too. You need to invite testers, wait for them to install, give them time to use the app meaningfully, and collect feedback before the testing period ends. If you open beta on a Tuesday and close it Friday, you'll get shallow feedback. Plan for at least 2 weeks of active beta usage.
ASO work starts while development is finishing — not after. App Store Optimization affects discoverability from day one, and the assets take time to produce.
ASO Gantt tasks:
Screenshot and video production is the most time-consuming ASO task. Plan for 2–3 weeks of design and revision. App icons need to look sharp at 1024×1024 before the platforms scale them down — any fuzziness in the master file becomes a problem.
Review timelines are outside your control, but you can plan around them.
Apple App Store:
Google Play Store:
Gantt structure for review:
Don't schedule your marketing launch for the day you expect App Store approval. Add a 5-day buffer. If Apple rejects and you need to resubmit, you'll miss your own launch by a day if you haven't built in buffer time.
Marketing assets must be ready before the apps are published — press coverage, social posts, and email campaigns should drop at the same time the app becomes available.
Marketing launch Gantt:
Launch is not the end. The first two weeks after launch are the highest-risk period for critical bugs.
Post-launch Gantt:
Reserve developer capacity for hotfixes during the first two weeks. Don't immediately rotate the entire team to the next sprint after launch. A P0 bug discovered by 10,000 users on day 2 needs immediate attention — if the team is deep in new feature development, the response time suffers.
The app launch Gantt typically spans 20 to 28 weeks for a well-resourced team with a medium-complexity app. Simpler apps with experienced teams can hit 12–16 weeks. Complex apps with backend systems, multiple integrations, and full-platform support run longer.
Build the Gantt starting from your target App Store submission date and work backward: submission date minus review buffer gives you your code freeze date; code freeze date minus beta duration gives you QA start; and so on. When you hit the discovery tasks at the beginning, you'll know whether your target launch is achievable or needs to move.
Use gantt-chart.io to manage the parallel iOS, Android, and backend tracks, assign tasks to specific engineers, and give stakeholders a live view of progress toward launch. When the QA phase reveals more bugs than expected and needs to extend two weeks, the Gantt shows exactly which downstream milestones shift — and lets the team make an informed decision about launch date rather than a panicked last-minute call.
A mobile app launch is complex enough without the added stress of losing track of where things stand. The Gantt keeps the whole team — developers, designers, QA, marketing, and executives — oriented toward the same finish line.