If you have multiple businesses or need individual separate accounts, you have the ability to create multiple accounts and use the same mobile device, reader, and bank account. You can only link one bank account per Square account, but individual Square accounts can share a bank account if needed.
Regarding this, can you use square with Android?
The Square magstripe and chip card readers are compatible with most Apple iOS and Android devices running the latest software versions. We don't currently support: Check if your device is supported from Square's Device Compatibility page.
Can you use a laptop with a square?
You can only accept payments on iPhones, iPads, and Android phones. Perhaps there's an unofficial way to use an Android or iOS emulator on a laptop to do accept payments with Square from the laptop, but I don't know anything about that.