GLOSSARY
What is SFI?
Published: 2026-08-25 · Updated: 2026-09-20
SFI is the official sing-box client for iPhone and iPad. Install it only from the Vinipuch download page: the App Store, the sing-box MT app. The five letters SFI, SFA, SFW, SFM and SFL are platforms, not five free slots. The device limit is on the plan card. Third-party shells are not recommended.
iPhone and iPad: download SFI from the download page. the App Store, the sing-box MT app.
In the client, create a Remote profile and paste the personal link from Connect in the bot or the cabinet.
Client letters do not raise the device limit. How many slots you have is on the plan card.