iOS
GGPoker on iOS: installing on iPhone without the App Store
Where the App Store does not carry the client, the room distributes its iPhone version through an enterprise profile: you install from a link in Safari and approve it once in settings. Standard practice for poker rooms - with a few traps.
Open the room's download page in Safari, tap Install in the iOS section, confirm the profile, then go to Settings - General - VPN and Device Management and trust the developer. After that the app launches like any other. It must be Safari: other browsers on iPhone cannot install profiles.
Step by step
Safari only
The install link works from Safari; Chrome, in-app browsers and mail clients will not install a profile.
Install the profile
The iPhone asks permission to download a configuration profile. Confirm.
Trust the developer
Settings - General - VPN and Device Management - the room's profile - Trust. Without it the icon appears but the app will not open.
First launch
Longer than usual while the client fetches resources; then sign in or register via the partner button.
The app installed but will not open
Most often the trust step was skipped. The second cause is a revoked profile: Apple periodically invalidates enterprise certificates, and the app stops launching for everyone at once. The cure is the same - delete the app, open the room\'s site in Safari and reinstall from the fresh link. Balance and history are untouched; they live on the server.
Integrity check error
"Unable to verify app integrity" appears when the phone cannot reach Apple\'s servers to check the profile, or the profile is already invalid. Make sure there is internet and no VPN, then retry; failing that, reinstall.

Playing for money on a phone
For one table - yes, especially in Rush & Cash and Spin & Gold, where hands are short. For heavy multi-tabling and stats review, use the desktop. General mobile guidance: Poker apps.
Keep reading
GGPoker on Android
How to get GGPoker on Android: where the official APK lives, how to allow installs from the browser, what the package parse error means and how the client updates itself.
Download
How to download GGPoker for desktop and mobile: the official Windows installer, instructions for macOS, Android and iOS, system requirements and how to spot a fake installer.
Poker apps
Poker apps for real money: how mobile clients differ from desktop, which formats suit a phone, installing apps outside the stores, keeping cashier and account safe, and why the GGPoker client is our pick.
Login
GGPoker login explained: where the account area is, how GGPass sign-in and verification codes work, what causes the 60-minute lock and what to do when codes stop arriving.
Play from an iPhone today
Install the client through Safari and create a GGPass via the partner link: bonus and freeroll tickets are credited automatically.