These are the options to start using Enketo:
Pick a service that includes Enketo
Simply pick a tool that has Enketo Smart Paper built-in. This is usually the best option.
Run Enketo yourself
Enketo is 100% free and open source. Look into installing it yourself and ask for support from other users in the user forum. Consider funding Enketo's further development of new features and fixing of bugs.
Use a paid Enketo-only or custom service
Consider paying for one of the services that run Enketo for you.