1Tor-based browsers
Look for browsers recommended by the Tor Project for iOS rather than random apps with Tor in the name.
2Same address rules
Paste the tor watch onion address and compare the full string after it loads.
3Limited protections
iOS restrictions mean these browsers cannot offer every Tor Browser feature. Be extra careful with logins.
4Prefer a computer when possible
For first visits, a desktop Tor Browser makes it easier to check the address.