A few weeks ago I got surprised by an AI bill and built TokenBar because I wanted a dead-simple way to see token usage live from my Mac menu bar.
That part made for a clean founder story.
The messier part is what happened after.
I shipped the first version fast. Then I did what a lot of solo devs do when they feel momentum: I kept polishing the thing that already existed instead of facing the harder problem.
I tweaked the UI.
I added little quality-of-life improvements.
I thought about more features.
I kept telling myself I was "shipping fast."
But shipping fast is not the same as shipping smart.
The expensive mistake I made building TokenBar was not the original bill. It was spending too much time improving a product before I had real proof that strangers cared.
That's the trap with small Mac apps.
They are fun to build.
They're tight in scope.
You can make visible progress in a weekend.
And because the app actually works, it's easy to confuse product progress with business progress.
Those are not the same thing.
I had a working app. What I did not have was distribution.
Nobody wakes up thinking, "I need a token counter in my menu bar today."
They wake up annoyed that Claude or OpenAI cost more than expected, or that they have no idea which workflow is burning money.
That sounds obvious now, but I built too much around the solution before I got disciplined about the problem.
So I changed how I think about TokenBar.
Now the product is the easy part.
The harder part is making the pain legible.
If someone lands on tokenbar.site, they should understand the value in seconds:
- you are spending money on AI
- you do not have a great feel for where it goes
- this gives you visibility without opening dashboards all day
That is a much better story than "look, I built a neat Mac utility."
Another lesson: pricing forces honesty.
I priced TokenBar at $5 lifetime because I wanted the decision to feel stupidly easy. If the pain is real, $5 should feel trivial. If even $5 feels too high, the problem probably isn't painful enough yet, or I'm explaining it badly.
That has been useful feedback. Cheap products remove a lot of excuses. People either get it quickly or they don't.
The biggest solo dev lesson here is simple:
If you're building in public, be careful not to hide inside building.
Code feels productive. Design tweaks feel productive. Rewriting onboarding copy for the fifth time feels productive.
Sometimes it is.
A lot of the time, it's just a cleaner form of avoidance.
The uncomfortable work is putting the app in front of real people and letting the market tell you whether your clever idea is actually worth anything.
TokenBar is still teaching me that.
And honestly, that might be the real product of this whole thing.
Not just a Mac app, but a better filter for my own founder delusion.
If you're building AI tools or small Mac utilities, I'd love to hear what mistake cost you the most time.
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