HideMyAss (HMA) is a well known proxy and vpn service used by thousands of people since 2005. Is often used to access sites that cannot be loaded being censored in some countries (ex. Facebook was censored in some countries).
The service includes a large number of servers and IP addresses across the entire World. Once you login to your account, download and install the software, in the applications's dashboard you can choose which server to use as a VPN to change your IP address.
You can set the program to change automatically the IP address at a custom interval. It is available for many devices and systems, including Android, iOS, Mac.
This VPN software should be modernized and improved as user experience. Also, their installation file doesn't appear 100% clean when we tested with virustotal.com