What is "safety buffer" or leeway?

Safety buffer refers to the number of days before you will derail on your goal, if you do absolutely nothing else between now and then. This is usually the number of days left in the countdown above your goal. In the image below, the countdown ends in 2 days, 12 hours, and 51 minutes, so we'd say this user has 2 days of safety buffer on it.

shanaqui/meditation: +1 due in 2d 12h 51m or pay $0

When you create a new goal, you get the option to start it with some additional leeway. That basically allows you to decide the date by which you want to have made progress on the goal: if that's today, then you'd enter 0 to make the goal due today; if that's the day after tomorrow, you'd enter 2, to make the goal due in two days.

A caveat for Do Less, Whittle Down, and weight goals

On these goal types, the safety buffer is sometimes more of an estimate than a statement of fact. It's the number of days until your data crosses the bright red line... assuming that nothing else about your data changes.

For example, we might tell you that you've got 6 days of buffer on your eat less cookies goal. But we also can't prevent you from eating two boxes of cookies and blowing through an entire month's allowance in one really bad day. Or you may be doing great on your weight goal and have 40 safe days. But after an indulgent birthday dinner and a heavy weigh-in the next morning, now you're suddenly down to 3 safe days!

On those types of goals, it's best to pay attention to your hard cap limit instead. I've been overachieving here and avoiding fastfood, so I've built up a nice buffer of +3 fastfood meals allowed. The goal thus says I have 42 days of buffer — but if I go to eat fast-food more than three times today, then I can still derail today.

shanaqui/fastfood: limit +3 safe for 42 days or pay $30

The highlighted number will tell you exactly how many cookies you can eat today, or the highest weight you can report today, before you get on the wrong side of the bright red line. If you stay below this, you'll be safe no matter what, even though your number of safe days may bounce around from day to day.

If you want to plan ahead, the "Hard Cap By Day" table viewable in your goal's Statistics can help:

Hard Cap By Day table, showing that +3 is the delta all week, and the safe total allowed all week is 186

If you look at the total column, it shows 186 units in total for the whole week -- so that's the limit for the whole week. The delta column shows you how much that is: in this case, +3.

Keywords: number of safe days, amount of buffer, how long till you derail

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