Is Bubble totally free?

Could you please clarify the statement "Is Bubble totally free?"? Are you inquiring about the financial cost associated with Bubble, or perhaps its accessibility or usability? Bubble, as a platform, often offers free tiers or starter packages, but it's crucial to understand if there are any hidden costs or paid upgrades that may be required for advanced features or increased functionality. Additionally, is there a specific aspect of "totally free" you're interested in, such as freedom from advertisements, data privacy, or the absence of any usage restrictions? Could you elaborate on your query to help me provide a more accurate response?