What tools are you currently using for Amazon FBA in 2026?

I’m researching the most effective tool stack for Amazon US sellers this year.
For those actively selling, what tools do you use for:

• Product research
• Keyword research & listing optimization
• PPC management
• Inventory forecasting
• Profit tracking

Please share what’s actually working for you (not just what’s popular). If you have experience switching tools, I’d also appreciate hearing why.

Thanks in advance.