Sip

A Drink Reminder App for iPhone That Is Not a Fixed Alarm

A reminder every two hours on the dot is the reason these apps get deleted. It goes off while you are drinking, and it goes off at night. Here is what Sip does instead.

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Four rules that always hold

Whatever the arithmetic below produces, these four are never broken.

Where the spacing comes from

Sip takes the length of your waking day, divides your goal by the average size of your glasses to get the number of drinks it implies, and divides one by the other. Somebody drinking from a half litre bottle needs fewer reminders than somebody using a small cup, so they get fewer, without either of them setting anything.

The result is then held between the 45 minute floor and the four hour ceiling.

Reminders that follow the day, with Premium

The free version keeps an even rhythm. Premium adds a factor on top of the spacing, based on how much you have had against how much the plan expects by this hour.

Where you standWhat happens to the gap
Under 70 percent of the planShortens to 70 percent of normal
Between 70 and 95 percentShortens to 85 percent
Between 95 and 115 percentUnchanged
Over 115 percentStretches to 150 percent, it can be quieter

The bands are capped on purpose. A poor morning should not turn the afternoon into a drumbeat.

Quiet times, with Premium

An afternoon nap, a service, a standing appointment. Add the range and no reminder is placed inside it; one that would fall there moves to the end of the range instead. Ranges may cross midnight.

What Sip cannot promise

Reminders are scheduled by your iPhone and delivered by iOS. If notifications are switched off for Sip in the iPhone Settings app, nothing arrives, and no app can work around that. Sip is an everyday helper, not a medical device: please do not rely on it as the only prompt for anything that matters medically.

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Common questions

How often does Sip remind you to drink?

There is no fixed interval. Sip works out the spacing from the length of your waking day, your goal and the average size of your glasses, then holds it between 45 minutes and four hours.

Does Sip remind you at night?

No. Reminders are only ever placed between the wake time and the bedtime you set. A reminder that would fall in the night is moved to the next morning instead.

What happens after I reach my daily goal?

Sip stops for the day. No further reminder is scheduled once the recorded amount reaches the goal, and the count starts again the next morning.

What do adaptive reminders actually change?

The spacing, by a factor tied to how you are doing against the plan. Well behind, the gap shortens to 70 percent. Slightly behind, to 85 percent. On plan, it is unchanged. Comfortably ahead, it stretches to 150 percent. The 45 minute and four hour limits still apply.