u/mergisi

Spent the last few weeks building Pattern — Personal Pattern AI.

It reads your:

All on device.

Then it writes one paragraph a day:

The pattern you would have missed in a chart.

The one that hooked me:

My deep-tagged sessions almost all started above 55ms HRV.

The shallow ones were mostly below 42ms.

No matter how hard I pushed.

Focus tracked recovery, not willpower.

A few things I cared about from day one:

Solo build.

No funding.

Live on the App Store now:

Happy to answer anything about:

Some days I can hold 90 minutes of deep work.

Some days, 25 is a stretch.

The fixed pomodoro ignores that.

So I started choosing my session length based on two things:

I tag each session as:

The pattern that showed up was pretty clear:

When HRV was above 55ms, sessions were almost always deep.

When HRV was below 42ms, they were mostly shallow, no matter how hard I pushed.

Focus tracked recovery more than willpower.

So now:

High HRV + open afternoon = I plan for 90 minutes.

Low HRV + packed day = I cap it at 25 and stop pretending.

Has anyone else matched block length to energy instead of using a fixed timer?

Did it help, or is the rigidity of 25 minutes actually the point?