Managing Variables

A variable is one thing you want to track. The Settings screen is where you create, edit, reorder, and remove them.

Open Settings by tapping the gear icon in the top-left of the main screen.

Adding a variable

In the Variables section, tap Add Variable. The Edit Variable view opens with two cards.

About card

Name — what you'll see on the main screen. Up to 32 characters.
Note — a short reminder of what this variable means. Up to 256 characters. The note appears as a subtitle under the name on the main screen.

Type card

Type — choose Boolean (a yes / no toggle) or Number (a slider).

For Number variables, three more controls appear:

Precision — how many decimal places to keep (see below).
Range Min — the smallest value the slider can reach.
Range Max — the largest value the slider can reach.

When you're happy, tap Save.

Editing a variable

Tap any variable in the Settings list to open the same Edit Variable view, with the variable's current settings filled in. Change anything and tap Save.

Editing the Min, Max, or Precision of a Number variable does not alter past data — historical values are preserved as recorded. New values you enter from now on use the new settings.

Deleting a variable

Inside the Edit Variable view, scroll down and tap Delete Variable. You'll be asked to confirm.

Deleting a variable does not remove its history. Past entries are kept so the record of those days remains complete. The variable is just hidden from the main screen and will not be shown when you record new days.

Reordering variables

In the Settings Variables section, tap Reorder in the section header. Each row gets a grab handle on the right. Drag a row up or down to put it where you want, then tap Done.

The order on the main screen is the order in this list. Because Boolean variables share rows in pairs, neighboring booleans in the list will end up sharing a row on the main screen — keep this in mind when arranging.

Precision New in 2.7

Number variables have a precision setting that controls how many decimal places the variable keeps. The choices are:

Precision	Example
0 decimals	7
1 decimal	7.1
2 decimals	7.12
3 decimals	7.123

Why precision matters

Precision affects four things:

Slider behavior. While you drag, the slider is continuous. When you lift your finger, it snaps to the nearest step at the chosen precision. So precision sets how "fine" your slider's resolution is.
Displayed numbers. The value shown on the slider, in the data history, and in Reports is rounded to the chosen precision.
Saved data. The value Correlate writes to disk is the rounded value, not the raw slider position.
Search equality. A search like Sleep = 7 matches anything that displays as 7 at the variable's precision, so you don't need to chase invisible decimals.

Picking a precision

A few rules of thumb:

Recording from a device — match whatever your scale, watch, or other device displays. If it shows 80.45 kg, set precision to 2 decimals so you can record exactly that.
Subjective ratings — one extra decimal beyond what feels natural is often useful. On a 1–10 mood scale, precision 1 lets you say "like yesterday, but a touch less" by nudging from 7.0 to 6.8. Without that decimal you're forced into bigger jumps than your feeling actually warrants.
Remember that the slider, while a bit forgiving, can be impossible to control if you have 6 digits in the range (0 through 100.000). If you're using an iPad where there is more screen space, you may be able to set higher precision but that's probably not useful.

You can always change a variable's precision later. Past data is unchanged; future records use the new setting.

Min and Max also round to precision

Range Min and Range Max are themselves rounded to the chosen precision. Tapping the start or end of the slider will set these values directly.