Non so come disabilitare la barra di navigazione su Safari per iOS. Tuttavia, esistono applicazioni per iOS che potrebbero soddisfare i tuoi requisiti. Puoi cercare in internet termini come "kiosk browser ipad" o una query simile.
Una di queste applicazioni si chiama Amtel Secure Browser Kiosk . Non l'ho mai usato personalmente, ma è gratuito.
Amtel provides a secure restricted browser & kiosk application for iOS
users. Browser policies can be configured such that only whitelisted
links are made available to the end users. The application is designed
to help IT departments at Healthcare organizations, Financial
institutions, Education sector, Libraries, Hi-tech, Fleet management
etc manage browser security on the iOS devices. The Administrator can
customize the settings to stop blacklisted sites on the devices or
allow only favorite sites on the browser. The kiosk mode is designed
to give the users the benefits of mobile device technology with fewer
distractions & security risks. The configuration of browser settings
is done at Amtel Mobile Device Management console - MDM.