Yes, both Promtify and Just Prompts offer a Free Trial.
The starting price of Promtify begins at $2.99/month, while pricing details for Just Prompts are unavailable.
Just Prompts offers several advantages, including Additive Prompting feature, Enhances user-generated prompts, Allows for more context, Allows for nuanced inputs, Generates more accurate outputs and many more functionalities.
The cons of Just Prompts may include a Requires obtaining API key, Only two developers, Lacks specific model compatibility.
