Verizon’s Safe Wi-Fi is an ad-blocking VPN that costs only $3.99 a month
https://www.theverge.com/2018/7/27/17622810/verizon-safe-wi-fi-ad-blocking-mobile-vpn-price
Verizon introduced its own mobile VPN today called Safe Wi-Fi, which will hide your IP address when you use public networks. Safe Wi-Fi only works for Verizon customers on iOS and Android and it costs $3.99 monthly per account to cover up to 10 devices. Currently, Verizon is offering the first 30 days as a free trial.
To get the VPN, just log into your My Verizon app and head to “Products and Devices.” Then scroll down to Safe Wi-Fi. As of this writing, the feature has not appeared yet on my iOS app that’s been updated to the latest version, so it’s not clear if it’s just hard to find or if the feature is still rolling out.