What are some alternatives?
When comparing ClickSSL and OpenSSL, you can also consider the following products
Let's Encrypt - Let’s Encrypt is a free, automated, and open certificate authority brought to you by the Internet Security Research Group (ISRG).
SSL2BUY - SSL2BUY is the foremost SSL certificate provider of online security solutions for businesses.
Digicert - Encryption & Authentication
React Native - A framework for building native apps with React