Can the manager on the farm and the owner in the city work at the same time without overwriting each other's data?

Yes, they can work at the same time: when online, whatever one farm user records shows up instantly on the others' screens, without reloading. For that, each person needs their own user (Export or Hacienda Pro plans), and it's best that two people don't edit the same record at the same time, because the system doesn't detect that clash.

How real time works

• Every addition, edit or deletion is announced over a permanent connection (WebSocket) to all open sessions of the same farm, and the tables update by themselves. That notice only reaches your farm's users.
• Each device's mirror copy (the offline mode) is also kept up to date by those notices.
• If the manager recorded without signal, their records upload when the connection comes back (how). That upload doesn't trigger the instant notice: the others see it when they open or reload the screen.

How many users you need

• Seed and Harvest: 1 user. Export: 2. Hacienda Pro: 3. The owner counts as one.
• With a single user, the account can be opened on several devices, but then everyone signs in as the same person, with the same permissions.
• Users are added from the avatar menu, under «Users and permissions». Each one gets a role that defines which pages they see and whether they can create, edit or delete in each module (roles and permissions).

If you need more users, check the plans by farm size.

So you don't overwrite each other's data

Edit conflicts aren't detected yet: if two people change the same record, the last one saved stays, and if one of them was offline, their version wins when it uploads and the other change is lost without warning. What works in practice is splitting the work:

1. The manager records the tasks, the advances and whatever happens during the day out in the field.
2. The owner checks the «Home» screen, with its indicators and finances, and «Accounts payable» from the city.
3. If a record needs fixing, only one person fixes it.

What the system does do: when it uploads what was recorded without signal and finds something that looks like a duplicate, for example the same task by the same worker on the same day, it flags it for review. It doesn't block or delete anything.