How Luma Log reads your days

Every number in the app comes from something you typed. This page explains what happens in between — what the charts count, what the sentences mean, and why the app sometimes says nothing at all.

What you give it

One entry holds five things: the activity, when it happened, your energy before, your energy after, and how much you enjoyed it. Energy and enjoyment both run from 1 to 5.

Time is kept in whole hours, and one entry covers at most four hours. Longer than that and a single reading gets stretched so far that nothing is left to see — a workday logged as one block says only that the day happened. In shorter blocks, the moment your energy turned is still visible.

Notes are yours alone. They never appear in a chart or a sentence.

From a block to a line

An entry occupies every hour it covers. Your energy runs from the “before” value at the start to the “after” value at the end, and each hour takes the value it had reached by then. Only the middle is filled in; both ends are what you typed.

The four numbers

At the top of Patterns are four figures that need no interpretation. They only count what is there.

Avg energy weighs by the hour, the same way the charts below it do: four hours spent at level 2 count four times as much as a single hour at 5. If you log in one-hour blocks, that comes to the same thing it always did.

Average and net answer different questions

The average tells you how one activity tends to leave you. The net tells you what everything together did — including how often you did it. Twenty small dips of −1 add up to −20 and outweigh one heavy −4, which is exactly what an average hides.

Net energy is not the difference between Monday morning and Sunday night. Blocks don’t join up: if one entry ends at 2 and the next begins at 4, something happened in between that you didn’t log, and that gap is counted nowhere. Read it as “the things I wrote down pulled me down 24 points”, not “I am 24 points emptier than I was”.

The charts

Energy through the day

Your average energy per hour, from 06:00 to 22:00. A stub instead of a bar means nothing was logged in that hour. Hours are filled from the blocks as described above, so a long entry colours every hour it covers.

Energy per day & by weekday

The same values grouped differently — day by day for the last month, and Monday through Sunday across the whole period. Like the figure at the top, both weigh by the hour: four hours at level 2 and one hour at level 5 average to 2.4, not 3.5. When you ask how a day went, how long you felt that way is the point.

Gives you energy · Costs you energy

Your activities sorted by average change, the top five in each direction. Both halves share one scale, so a bar twice as long really is twice the swing. Each row also carries how often you logged it and the net total, because those two together say more than either alone.

By category

The same picture one level up: where your energy comes from and where it goes. Categories usually have far more entries behind them than a single activity, so this is often the first chart that has something to show.

Where your time goes

The only chart about hours rather than energy — your five biggest time sinks, by logged hours rather than by how often you opened the app.

The sentences

Above and below the charts you’ll find plain sentences. They observe; they never instruct. You’ll read usually, often and tends to, and never “you should”.

They wait until there is enough

A sentence about an activity needs at least five entries of that activity; a sentence about a category needs eight. Below that, the app has an opinion it cannot support, so it keeps it to itself.

They share first place

When several activities come out equally, they are all named — picking one would suggest a difference that isn’t there. Averages that land within 0.2 of each other count as equal. And when more than three things share the top spot, nothing stands out at all, so no sentence appears.

They allow more than one peak

Energy doesn’t politely peak once. Consecutive strong hours are read as one window (“between 10:00 and 13:00”), two separate highs are named together (“around 10:00 and 16:00”), and a day that is level throughout gets no claim at all.

They only name a part of day when it fits

“Focused work fits you best in the morning” appears only when every strong hour for that activity falls inside the same part of the day. A block that runs from nine to five belongs to no single part, and the app won’t pretend otherwise.

When it says nothing

An empty-looking Patterns screen usually means one of two things.

  • There isn’t enough yet. Patterns appear after about two weeks of logging. The charts still fill in from day one.
  • There is no pattern. If everything you do affects you about equally, that is the honest answer, and the app would rather say nothing than invent a favourite.

Silence is a result too. It is not a sign that something went wrong.

Where this happens

All of it runs on your phone. Your entries stay on the device, there is no account to make, and nothing is sent anywhere to be calculated.