Use b4app on your iPhone
The iPhone companion lets you follow conversations associated with your Mac. The agents still run on the Mac or their B4 server.
Before you pairCopy link to section: Before you pair
You need an installed, signed-in Mac app and a compatible iPhone companion. Your iPhone needs iOS 26 or later.
iPhone download — coming with the public release. The installation link will be added here when the companion is available.
Pair with your MacCopy link to section: Pair with your Mac
On your Mac, choose Add your iPhone. You can also find pairing under Settings → Remote access.
Scan the code with the companion's scanner or your iPhone Camera, then confirm the pairing. The code is single-use and expires after five minutes. Ask the Mac for a new code if it expires.
Follow a conversationCopy link to section: Follow a conversation
Once connected, the phone receives synced conversation history. Supported remote actions travel through the hub to the Mac. Read the connection state before expecting a new request or decision to reach it.
The phone's copy of a conversation is different from the runtime doing the work. Seeing history does not mean the Mac is currently reachable.
When the Mac is unavailableCopy link to section: When the Mac is unavailable
A sleeping, disconnected, or signed-out Mac cannot handle remote work as though it were online. Check its connection and account state. If a send is not confirmed, follow the state shown in the app rather than immediately sending the same request again.
Notifications depend on the phone's notification settings and the synced state. Open the conversation to see whether it still needs your attention.
Read accounts and sync for what is shared between devices.