Why not use the full download version of CiviCRM?
That’s a great question, and we couldn’t agree more! The full download version of CiviCRM provides you all of the features and flexbility of CiviCRM. It’s free to download and use and always will be.
Having said that, Spark allows you to use many of the most popular features of CiviCRM without any technical administration. If you’ve never used a CRM before or are not comfortable installing CiviCRM on your own, the Spark may be a great starting point for you.