The part that is simply true
What happened and when, in your own record. No estimate involved.
Private cycle tracking
Track your cycle without pretending the calendar knows more than it does.
Log period starts, flow, symptoms and notes. Loopa estimates timing from your own history and is plain about what a calendar cannot tell you.
Requires Loopa Premium Opt-in. Off until you switch it on.
Start on Loopa Basic. This feature unlocks with Premium, at $12.99 a month or $69.99 a year.
Estimates from a calendar. Not contraception.
Everything Loopa shows about future timing is calculated from the dates you have logged. It is not a measurement of ovulation, a hormone level, or anything happening in your body today.
A fertile window estimated from dates must not be used as contraception, and it is not evidence that ovulation occurred or when. It cannot tell you whether unprotected sex is safe. If you are avoiding or trying for pregnancy, that belongs with a clinician and a method built for it.
Loopa is a tracker. It does not diagnose a cycle disorder, assess your fertility, or interpret what your log means about your health.
Why it matters
Most of the value is the record, not the prediction
A cycle app that leads on prediction is selling the least reliable thing it does. What is actually useful is a year of your own dates, your own flow and your own symptoms, in the same place as your weight, your sleep and how you felt, so that when something changes you can see when it started.
Your own averages
How long your cycles have been running, and how much they vary.
And its limits, stated
What the calendar suggests comes next, described as what it is.
What you log
Five levels of flow, ten symptoms, and anything else in a note
A period start is worked out from the flow days you logged rather than being another thing to remember to mark.
Five levels
From spotting to heavy, or none. Loopa derives the start of a period from the pattern of those days.
Ten of them
Cramps, headache, bloating, fatigue, backache, nausea, tender breasts, mood swings, cravings and acne. Neutral words, and no scoring.
For whatever the list does not cover
Free text, kept encrypted with everything else.
What Loopa estimates
And what it is estimating from
Every figure here comes from dates you entered. Nothing else is measured.
From two starts or more
With fewer than two recorded starts Loopa gives no prediction at all rather than one built on a single point.
Roughly, from your average length
The first half of your average cycle is labelled follicular and the second luteal. It is a split on a calendar, not an observation of your body.
From the same dates, and with the same limits
Derived by counting back from an estimated next start. It is not evidence of ovulation, it is not a contraceptive method, and the more your cycles vary the less it is worth.
Which is the useful number
The spread in your own cycle lengths is what tells you how much weight any of the above deserves.
Two different tools
The calculator on this site, and the tracker in the app
They answer different questions and they behave differently, so it is worth knowing which you are using.
Free, in your browser, forgets everything
Enter your last start and your usual length and it answers once. Nothing is stored, no account is involved, and the dates never leave your device. It also REFUSES to draw a fertile window once your cycles vary by about a week, and says why.
Open the calculatorPremium, and keeps your history
A record over months and years, with flow, symptoms and notes beside your other health data. Its prediction is drawn from your average and is less cautious than the calculator: it does not withhold a fertile window when your cycles are variable, so read it with that in mind.
Privacy
The most protected thing in Loopa
Reproductive health data deserves a higher bar than the rest, so it gets one.
And invisible until you turn it on
Cycle tracking is opt-in. Until you switch it on the tab is not in the app.
Under a key tied to your account
Flow, symptoms and notes are stored in your encrypted health record like everything else.
Not a date, not a symptom
There is no cycle information in what the coach is given. Not the phase, not the dates, nothing.
If you grant it, and only that
The date you last logged something, so they know the record exists. Never the flow, the symptoms, a note or a phase. Every read is checked and logged.
Deliberately
Cycle data is left out of the clinician share report and the raw data export. It is the one thing in Loopa that is.
Because there is none
No ad SDK, no advertising ID, no tracking pixel, and never your health data in analytics, on either plan.
What Loopa can see
FAQ
Questions about cycle tracking
Including the ones about what it is not.
Is cycle tracking on by default?
No. It is off until you switch it on, and while it is off the tab is not in the app at all. Deleting an entry you logged stays free even if Premium lapses.
What can I log?
Flow at five levels including spotting, ten symptoms, and a free-text note. Loopa works out when a period started from the flow days you logged rather than asking you to mark a start.
How much history does it need before it predicts anything?
Two recorded cycle starts. With fewer than that it gives you no prediction rather than a confident one built on a single data point.
Does Loopa know what phase I am in?
It estimates one from dates. With enough history it labels roughly the first half of your average cycle as follicular and the second as luteal. That is arithmetic on a calendar. Loopa does not measure ovulation, hormones or basal temperature, and it cannot tell you what is actually happening in your body.
Can I use the fertile window as contraception?
No. A calendar-derived fertile window is an estimate from dates, it is not evidence that ovulation happened or when, and it must not be used to prevent pregnancy or to decide whether unprotected sex is safe. Loopa says this on every surface that shows one.
What if my cycles are irregular?
The standalone period calculator on this site refuses to draw a fertile window at all once your cycle length varies by about a week, and tells you why. The in-app tracker is less cautious: it will still draw its estimate from your average. Either way, the more your cycles vary, the less a calendar estimate is worth, and the log itself keeps being useful regardless.
Does an AI see my cycle data?
No. The AI coach receives nothing about your cycle: not the dates, not the symptoms, not a phase. There is no cycle information in what it is given.
Can a Loopa Coach see it?
Only if you grant it, and then only the DATE you last logged something. Not the flow, not the symptoms, not a note, not a phase. A date, so they know the record exists. Every read is checked and logged.
Is it in my exports?
No. Cycle data does not appear in the clinician share report or in the raw data export. It is the one thing in Loopa deliberately left out of both.
What about the period calculator on this website?
That is a different thing and it is free. It runs entirely in your browser, needs no account, and the dates you enter never leave your device. The in-app tracker keeps a history over time; the calculator answers one question and forgets it. Period calculator.
Start with the log, not the prediction
Cycle tracking is part of Loopa Premium and it is off until you switch it on. The estimates are calendar arithmetic and Loopa says so.
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Estimates from a calendar. Not contraception, and not medical advice.