The phone holds the inventory, adds and edits items, logs maintenance and shows the whole pack's sizes — offline.

- Inventory, grouped by type. The owner and handlers tap “Add equipment” (at the top of the list, or from the empty screen) and then an item to edit it: the website's fields, service reminder included — except the catalogue model, the photo and creating for several dogs at once (one dog at a time). Writes are local and leave at the next moment the network is there.
- Pack sizes: “Pack sizes”, at the top of the list (and under the empty screen), opens the table of the whole pack, like the website's “By dog” angle: one active dog per row (a dog on loan or gone has none), one worn type per column, the size in each cell. The table scrolls sideways and the dog's name stays pinned. An empty cell stays “—”; an item assigned with no size recorded says “size to record”; sizes that are recorded but whose model hasn't reached the phone yet are counted under the dog (“1 size pending”), never taken for an absence. The owner and handlers tap a cell to record or correct that dog's size for that type: the dog's own size entry opens on the right type. Other roles read the table, with no button. It all reads and writes without a network. What the website does on top: pre-fill the brand and model from the assigned item; here, one cell at a time.
- Retiring: “Retire this equipment” takes an item out of the “In service” list (a message at the top of the screen offers “Undo” for 4 seconds); the “Retired” section keeps it readable and “Put back in service” brings it back. A viewer, a vet or a guide sees the list, with no button; deleting an item stays on the website.
- Maintenance: on an item whose service interval (kilometres or days) is set, “Maintenance due” appears when it's due and “Log maintenance” (always available, a link otherwise) becomes a button; it asks for the kind, the date, and an optional cost and notes, no network needed. “Maintenance log”, under an item that has any, opens its history: everyone can read it; owner and handler tap a line to correct or delete it, and “Maintenance due” is recalculated.
- Before a GPS-tracked outing, “Which equipment?” offers your durable rigs with their usage when the chosen setup uses one (sled, quad, bike, scooter, kart): one at a time, none blocks the start; for other setups, no picker. “Start now” ticks the rig when only one is compatible, none when there are several.