Dispatch to driver, however far out they are

No range limit, because there is no radio

Coverage is wherever there is cellular or Wi-Fi. Adding a depot is adding people to a channel, not installing hardware on a tower.

• No tower leases, repeater maintenance or spectrum coordination
• Voice frames are small and the client tolerates loss, so it holds up on a weak connection
• A signal indicator warns the driver before they key the mic, not after

Built to be used without looking at it

The control is a ring roughly two thirds of the screen wide, because the person pressing it is driving, wearing gloves, or holding something else.

• Every state is distinguishable at arm's length — transmitting, receiving, requesting, busy
• Transmitting and receiving differ by hue and direction of travel, so they read apart without colour vision
• A hardware push-to-talk button on a rugged handset works the same as the on-screen one

The part a scanner cannot do

Fleet radio traffic is clear in the air. Anyone within range with equipment costing less than a handset can listen to your dispatch, your routes and your customer names.

• Private and org channels are encrypted on member devices; push.tt relays ciphertext
• Load details, addresses and customer names are not broadcast to whoever is listening

Honest limit: v1 has no forward secrecy, so a channel key that is later compromised would open past traffic captured on that channel. It is on the roadmap and it is on the security page.