Yes, both PromptPerfect and Promptomania offer a Free Trial.
Pricing for PromptPerfect Starts at $16.67/month whereas for Promptomania Starts at $3.99/month.
PromptPerfect offers several advantages, including Optimizes prompts for LLMs/LMs/LMOps, Supports ChatGPT, GPT-3.5, DALLE, StableDiffusion and many more functionalities.
The cons of PromptPerfect may include a Limited model compatibility, Targeted at specific users, Only optimizes language prompts, Non-obvious results comparison. and Requires prompt input
Promptomania offers several advantages, including Free online tool, Supports multiple text-to-image models, Human-friendly prompt builder, References people, objects and many more functionalities.
The cons of Promptomania may include a No mobile app support, Limited diffusion models support, No offline functionality, No user accounts/password protection. and No guarantee of prompt quality