Get Reins.
Two apps that pair: the one on your phone decides, the one on your computer asks it. Both are free and open source.
Install on this computer
It pairs with your phone and connects Claude Code, Codex, Cursor and your other AI tools.
Choose your computerGet the phone app
Point your phone's camera here. It opens TestFlight on an iPhone and Google Playdownloads the app on Android.
Pair them
Open Reins on the computer. It shows a code; scan it with the phone app, or type it in.
WDJB-MJHT
Install on your computer
On your Mac, Windows or Linux computer, open this page:
reins2fa.com/download
Pair them
Open Reins on the computer. It shows a code; scan it with the phone app, or type it in.
WDJB-MJHT
Every platform
Computer
Phone
From the command line
macOS and Linux
curl -fsSL https://reins2fa.com/install.sh | shDebian and Ubuntu
sudo install -d -m 0755 /etc/apt/keyrings \
&& curl -fsSL https://reins2fa.com/releases/packages/reins.gpg | sudo tee /etc/apt/keyrings/reins.gpg >/dev/null \
&& echo "deb [signed-by=/etc/apt/keyrings/reins.gpg] https://reins2fa.com/releases/packages/apt stable main" | sudo tee /etc/apt/sources.list.d/reins.list \
&& sudo apt update && sudo apt install reins reins-appFedora
sudo curl -fsSL https://reins2fa.com/releases/packages/rpm/reins.repo -o /etc/yum.repos.d/reins.repo \
&& sudo dnf install reins reins-appWindows
irm https://reins2fa.com/install.ps1 | iex