I built TokenBar because I kept getting blindsided by AI costs.
Not the small stuff. The kind of bill that quietly gets ugly when you are shipping fast, testing prompts, and not watching the meter.
TokenBar sits in the menu bar and shows live token usage and cost while I work. That visibility changes behavior fast. You pause earlier. You trim the prompt. You stop treating usage like a mystery until the invoice lands.
That is the lesson for me as a solo founder: if a cost can surprise you, it can control you.
I want the product to do one simple thing well. Make spend visible before it becomes pain.
If you are building with AI and shipping quickly, the bill is part of the product too.
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