It can be done in iOS: in Settings -> Screen Time -> Content & Privacy Restrictions you can disable almost any app, including Safari and App Store. Ask a truste

It can be done in iOS: in Settings -> Screen Time -> Content & Privacy Restrictions you can disable almost any app, including Safari and App Store. Ask a trusted person to set a Screen Time Passcode (and keep safe backups) and you'll have pretty much zero opportunity to waste time on a phone. (You'll probably waste it on a laptop instead.)