If you're an AI enthusiast or a content creator looking to enhance the quality of your prompts and improve AI outputs, go with prompt-optimizer. Its user-friendly interface allows you to refine your prompts effectively without any cost. However, keep in mind it’s suitable only for web use, and if you need API access for integration into other services, this tool won't meet your needs.
On the other hand, if you're an AI developer or someone passionate about automation and need more advanced capabilities, browser-use is your best option. Despite its paid model, it offers features like stealth browsing and custom LLMs, making it suitable for complex online task automation. Just be prepared for potential costs as your usage scales, and note that extensive customer support isn't a strong point here—better for those who are self-reliant.