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How to Manage a Mobile App Development Gantt Chart

Manage your mobile app development project with a Gantt chart. Track iOS and Android workstreams, QA, app store review, and launch milestones. Free online tool.

How to Manage a Mobile App Development Gantt Chart

The Problem: Mobile Projects Have Hidden Complexity

Mobile app development looks simpler than it is. You're often building the same product twice—iOS and Android—plus a backend API, plus web admin tools, plus app store assets and review cycles that are completely out of your control. The App Store review process alone can add 1–7 days of uncertainty to any release. Google Play is faster but has its own quirks.

Without a mobile app development Gantt chart, teams discover these compounding delays at the worst time: days before a promised launch. The Gantt chart surfaces the sequencing problems early—when there's still time to adjust.

gantt-chart.io is free and requires no account. Build your mobile project timeline in the browser and share it with your whole team.

Prerequisites

  • Platform targets: iOS only, Android only, or both?
  • Backend dependency: Is there a new API, or are you using existing endpoints?
  • Design status: Is UI/UX design complete, or running in parallel with development?
  • App store accounts: Are developer accounts set up? (Apple $99/year, Google $25 one-time)
  • Target release date: Hard deadline (event, marketing campaign) or flexible?
  • Team structure: Separate iOS/Android engineers, or cross-platform (React Native, Flutter)?

Step-by-Step Instructions

Step 1: Set Up the Timeline

  1. Open gantt-chart.io
  2. Title the chart: [App Name] - Mobile Development Timeline
  3. Set start date to project kickoff
  4. Add 2 weeks at the end for app store review buffer
  5. Use Week view for overall planning

Step 2: Add the Five Core Phases

  1. Discovery & Design — wireframes, UX flows, design system
  2. Backend Development — API endpoints, database, authentication
  3. Mobile Development — iOS and Android parallel workstreams
  4. QA & Testing — device testing, regression, performance
  5. Release — app store submission, review, launch

Step 3: Build the Design Workstream

  1. User flow mapping and wireframes — Week 1-2
  2. UI design in Figma — Week 2-4
  3. Design review and approval — Week 4
  4. Design handoff to engineering — Week 4
  5. Design QA during development — Week 6-8 (parallel)

Step 4: Build the Backend Workstream

  1. API schema design — Week 1-2
  2. Authentication and user accounts — Week 2-3
  3. Core API endpoints — Week 3-6
  4. Push notification service — Week 4-5
  5. Analytics and error tracking setup — Week 5-6
  6. API documentation — Week 6
  7. Load testing — Week 7

Step 5: Build Parallel iOS and Android Workstreams

iOS:

  1. Project setup and architecture — Week 3
  2. Core screens and navigation — Week 3-6
  3. API integration — Week 5-7
  4. Push notifications — Week 6-7
  5. App icon and launch screen — Week 7
  6. TestFlight beta build — Week 8

Android:

  1. Project setup and architecture — Week 3
  2. Core screens and navigation — Week 3-6
  3. API integration — Week 5-7
  4. Push notifications — Week 6-7
  5. App icon and splash screen — Week 7
  6. Internal testing track build — Week 8

Step 6: Add QA and Testing

  1. Internal QA on simulator/emulator — Week 7
  2. Physical device testing (iOS + Android) — Week 8
  3. Beta user testing (TestFlight / Play beta) — Week 8-9
  4. Bug fixes from beta feedback — Week 9
  5. Performance profiling — Week 9
  6. Accessibility audit — Week 9

Step 7: Add App Store Submission Phase

  1. App store screenshots and preview video — Week 9
  2. App store listing copy and keywords — Week 9
  3. Privacy policy and terms of service — Week 9
  4. Submit to App Store review — Week 10 (mark as milestone)
  5. Submit to Google Play — Week 10
  6. Buffer: App Store review period — Week 10-11 (1-7 days, plan for worst case)
  7. Launch day — Week 11 (milestone)

Managing the App Store Review Wildcard

Apple's review timeline is the most unpredictable variable in any iOS launch plan. Build your Gantt chart with two scenarios:

  • Optimistic: 1–2 day review, launch in Week 10
  • Realistic: 5–7 day review, launch in Week 11

Mark the review period as a task with no assigned owner—you can't speed it up. The buffer prevents your whole launch plan from collapsing on a rejection.

If Apple rejects the build, add a Rejection: fix and resubmit task. Each resubmission adds another 1–3 days. Budget for one rejection.

Common Mistakes

Starting both platforms simultaneously without backend. If the API isn't ready, both iOS and Android teams are blocked or building against mock data. Let backend lead by 1–2 weeks.

No device testing budget. Emulators don't catch everything. Schedule time on real devices—especially for older OS versions where crashes are common.

App store assets as an afterthought. Screenshots, preview videos, and localized descriptions take more time than expected. Start them in Week 7, not the day before submission.

Template: 12-Week Mobile App Development

PhaseWorkstreamDuration
DesignWireframes + UIWeek 1-4
BackendAPI + AuthWeek 1-7
iOSBuild + integrateWeek 3-8
AndroidBuild + integrateWeek 3-8
QADevice testing + betaWeek 8-10
ReleaseStore submission + reviewWeek 10-12

Free at gantt-chart.io—no account, shareable link.