Ganttastic on mobile

Open your phone or tablet browser, go to ganttastic.com, and sign in. There is no separate app to download. On small screens the interface swaps to a touch layout with larger controls, and everything you change syncs live with your other devices.

A five tab bar sits at the bottom of the screen:

• Projects opens a Switch Project list of your projects, plus a + New Project item for creating one.
• Tasks opens the List view, the same editable table of tasks as on desktop. When you can edit the project, a long press on a row opens its menu: Edit Task, Add, Set Progress % (on tasks without sub-tasks), the milestone option, Manage Dependencies, Duplicate Task, and Delete Task. See working with tasks.
• Timeline is the Gantt chart, and it is the default view when a project opens.
• AI opens the AI Assistant panel; the tab is disabled until a project is open. See the AI assistant.
• Share opens sharing options for the current project. It is disabled when you only have viewer access.

The sidebar is still available: tap the menu icon at the top left to slide it out. It holds the full project list, the per project menus, and your account menu.

The floating + button at the bottom right always adds a task to the open project. It never creates a project.

1. To add a task: open a project and tap the floating + button.
2. To create a project: tap Projects in the bottom bar, then + New Project.

• The sidebar collapses into a slide out drawer behind the top left menu icon.
• Task Details opens as a sheet that covers the full width of the screen instead of a side panel.
• The timeline hides non-working days to save horizontal space, so dates jump straight over weekends and holidays.
• A scrubber bar lets you pan quickly across the timeline. It appears only on phones; on a computer you scroll the timeline instead.
• The task table beside the timeline is fixed at 180 pixels wide and cannot be resized on a phone.
• The Compact display density in App Settings has no effect on a phone.
• Where the phone supports it, taps on the bottom bar and the plus button give a short vibration.
• In portrait, a tip suggests turning the phone sideways, which fits far more of the timeline on screen.

On desktop you can drag a bar to new dates. On touch screens, dragging pans the chart instead, so rescheduling goes through the Task Details sheet:

1. Open the Tasks tab and find the task.
2. Long press its row and choose Edit Task. Task Details opens as a full width sheet.
3. Change the start or end date in the sheet, then close it.

Dependency rules apply the same way as on desktop; see dependencies and milestones.

When your connection drops, an Offline badge appears in the header and a banner says "You’re offline" and "You can keep viewing your loaded projects. Editing resumes when you reconnect." The banner hides after 5 seconds; the badge stays until you are back online. You can keep viewing any project that is already loaded: scroll the timeline, open task details, and switch views.

Editing is blocked while offline. Trying to add or change a task shows a toast asking you to reconnect, and AI features are unavailable. When the connection returns, a "Back online" toast appears and editing resumes. Nothing is queued while you are offline, so wait until you are reconnected to make changes.

Ganttastic is a progressive web app, so you can pin it to your home screen and open it like a native app:

• On iPhone or iPad: in Safari, tap the Share icon, then Add to Home Screen.
• On Android: in Chrome, open the browser menu, then Add to Home screen.

The pinned app opens in its own window without the browser address bar.