Gridiron Atelier

Gridiron Atelier is a fully offline Android app for preparing plays before a real American football meet-up with friends. Place conditional players on a vertical field diagram, give them short labels, draw movement routes and save combinations in your own playbook.

Main benefits:
• Arrange player markers and route points on a large vertical field
• Direction arrow and highlight for the selected player’s route
• Add points by tapping, change positions and delete a point with a separate action
• Select a marker and tap a new place as an alternative to dragging
• Undo and redo in the current editor session
• Saved play cards with name, participant count and small field thumbnail
• Search by title and notes, folder filter, copy and delete with confirmation
• Built-in examples copied to your collection before editing
• Restore unfinished drafts

Each combination card shows the saved field, name, folder, note and participant routes. Tap a participant row to highlight the matching route on the field, hide other routes if needed, then return to the full view.

In a meeting plan, add a local name, optional date and general note. Add combinations from the playbook and change their order. Each added combination stays as an independent snapshot, so later changes to the original play do not automatically change the copy kept in the plan. The plan overview shows all diagrams as compact sheets, and each sheet can be opened in full.

An optional camera feature in the plan card lets you attach one photo of the meeting place. The photo does not replace the field diagram and is not used to recognise or create routes. Core plan and playbook features work even without camera permission.

The app works without a network, account, server or remote data. Data stays on the device. Interface labels, messages, tutorials, examples and date/number formatting are in English; text you write is not translated.

Gridiron Atelier is a helper tool for hand-drawn planning. It does not claim physics calculation, automatic referee decisions or official play legality checks.