Period Tracker for IUD: 6 Apps Compared (2026)
A hormonal coil can thin or stop your periods and a copper one can make them heavier. Six apps, judged on what they do about that.
The best period tracker for IUD users depends on which coil you have. If a hormonal IUD has thinned or stopped your periods, Clue is the pick, because its Tracking mode runs without a period to count from; Spot On is the best free option for logging the coil itself; and with a copper IUD, which leaves your cycle in place, any honest calendar tracker works, with Otty the one to choose if a partner follows along. Most trackers were built around a monthly bleed, so the real question is what each one does when that bleed changes or disappears. This guide takes six apps on exactly that.
What is the best period tracker for IUD users?
The best period tracker for IUD users is one that still works when the period itself becomes unreliable. For a hormonal IUD that means an app with a mode that does not need a bleed to anchor the cycle. For a copper IUD it means an app that logs the method, marks heavier or longer bleeding without rewriting your dates, and labels any prediction as a guess.
Clue is the only app of the six with a dedicated no-period mode. Spot On, from Planned Parenthood, is the only one that lists the IUD by name as a method you can log, for free. Euki and Apple Health are the plain, private records. Flo is the biggest app and has a contraception setting that hides its fertile window. Otty belongs on the list for anyone whose coil has left their cycle intact and who wants a partner to see the same days.
Why does an IUD break most period trackers?
An IUD breaks most period trackers because the apps are built to count from the first day of a period, and a coil changes what that day looks like. A hormonal IUD can make periods lighter, shorter or absent, so the anchor goes missing. A copper IUD keeps the anchor but can make the first months heavier and more painful, so the pattern the app learned no longer fits.
The NHS says a hormonal IUS can make periods shorter or lighter, or stop them altogether, and that for 3 to 6 months after fitting they might become longer, irregular or more frequent. ACOG describes the same two stages: frequent spotting and more days of bleeding in the first months, then periods that may become less frequent and may stop completely.
The copper IUD runs the other way. ACOG notes that painful periods and bleeding may increase during the first months of use, and Cleveland Clinic explains that the copper device works partly by heightening the inflammatory response in the uterine lining. Your cycle keeps its rhythm, but the bleed an app expects on days 1 to 5 can run heavier and longer than it used to.
If your cycle has been unpredictable for other reasons too, the period tracker for irregular periods guide covers the same six apps on a cycle that will not settle into a pattern.
How we compared these apps
Every app was scored on the same five questions, and they double as the questions to ask of any tracker you meet later. The first one is the one most reviews skip.
One criterion sits under all five: an app must never rewrite a logged date to fit its own prediction. All six below pass that, which is why they made the list.
IUD period tracker comparison: 6 apps at a glance
The table splits the two situations a coil creates. Read the first column if you have a hormonal IUD and bleed rarely or not at all, and the second if you have a copper IUD or a hormonal one that still gives you a period.
Clue: the one with a mode for no periods
Clue is the best period tracker for IUD users whose bleeding has thinned or stopped because it is the only one of the six with a mode built for that. Clue’s support team writes that Clue Tracking mode was built in response to users on long-acting hormonal birth control such as the IUD, and that in it you can monitor mood changes, cravings, pain and more, and start a new cycle on your own terms with no need to track a period.
That is the exact gap a hormonal coil opens. You still have a hormonal rhythm worth understanding, you just no longer have the bleed that other apps use as day 1. Clue’s App Store listing shows a 4.8 rating from about 405,000 reviews, so it is also the most widely used app on this list. The catch is that the mode is a manual one: you decide when a cycle starts, and the app follows you rather than the other way round.
Spot On: the free one that logs the IUD itself
Spot On, from Planned Parenthood, is the only app here whose product page lists the IUD by name. It says you can track birth control methods including the pill, patch, ring, shot, IUD and implant, and that you receive period predictions if you have regular periods. With a hormonal coil and a thin cycle, that conservative rule works in your favour: the app logs what you enter and does not draw a circle it cannot justify.
It also logs mood and daily activities so you can see how they line up with your cycle, and its App Store listing is free with a 4.2 rating from about 15,000 reviews. The trade-off is that the app is deliberately plain, with no partner features and no deep analysis. For many copper-IUD users that is enough.
Euki: the private record with no account to make
Euki is here for one reason, and it is the same reason it appears in our privacy comparison: it is the simplest way to hold an honest record that nobody else sees. Euki’s own site describes an app where tracking your health should not mean being tracked in return, and says it is 100% free, with a Mozilla review quoted on the page calling it truly private.
With an IUD that means logging spotting, symptoms and the odd bleed without an app trying to predict anything from them. It is not a prediction engine, and for a coil that has made your bleeding irregular, that is close to a feature. Two honest flags: its App Store listing has a 4.2 rating from a small number of reviews, and at the time of writing its last update was September 2025.
Apple Health: the built-in one with a contraceptive factor
Apple Health’s Cycle Tracking is the free option already on your iPhone, and it has one feature that matters here. Apple’s support page explains that you can add factors that influence the timing and length of your cycle, and that the options are Pregnancy, Lactation or Contraceptive, each with a start date you can later end.
Alongside the factor you can log periods, spotting, symptoms and basal body temperature, and the six-day fertile window estimate is a setting you turn on rather than a default. With a hormonal coil, leave it off and treat Cycle Tracking as a symptom diary. With a copper coil, it is a complete tracker that costs nothing and stays on the phone you already carry.
Flo: the biggest app, with a setting that hides the fertile window
Flo is the most downloaded app on this list, with a 4.7 rating from nearly two million reviews on its App Store listing, and it does have a contraception setting. Flo’s help centre says that once you enable contraception reminders, the app hides the fertile window and ovulation predictions, and it walks through logging a copper IUD as your method. The birth control logging option is for users aged 18 or over.
What Flo does not have is a mode that runs without a period. Each cycle still begins with a logged bleed, so with a hormonal coil that has stopped your periods, Flo keeps predicting from the last one it saw. For a copper coil it behaves like the full-featured tracker it is.
Otty: the one for a bleeding cycle you share with a partner
Otty starts from the cycle length you set, anywhere from 20 to 60 days, and resets the count the day you log a period start. With a copper IUD, or a hormonal IUD that still gives you a period, that is all it needs: the heavier or longer bleed becomes part of the record, and your cycle history keeps each cycle’s real length. When a period runs late, the calendar marks those days as estimated and says so in plain words until you log the real start.
Otty is not the right fit for a hormonal IUD that has stopped your periods. It counts from a logged start, so with nothing to log it has nothing to anchor on, and Clue’s Tracking mode or a plain diary like Euki will serve you better. What Otty adds for everyone else is the partner side: invite your partner with a code and they see the same phase, the same estimate labels and one tip a day on how to help, on their own phone. If you want to check where you are without the app, count from day 1 and the phases fall out of it.
Which period tracker for birth control logs the method?
If your question is really which period tracker for birth control of any kind lets you record the method, four of the six do. Spot On lists the pill, patch, ring, shot, IUD and implant with reminders. Flo logs the method and hides its fertile window once contraception reminders are on. Apple Health records a Contraceptive factor with a start and end date. Clue logs the method and adds the no-period mode on top.
- Log the method and its start date the week it begins
- Log spotting as spotting, so the app does not read it as a period
- Turn off fertile-window estimates while on a hormonal method, where the app allows it
- Treat a day of spotting as day 1 of a new cycle
- Expect a calendar prediction to mean much in the first 3 to 6 months after fitting
- Rely on any tracker’s fertile window as contraception; the coil is the contraception
The coil changed the bleed. The app should change what it counts, not quietly keep guessing.
When is IUD bleeding worth a check?
Changed bleeding after a coil is expected, and most of it settles. The NHS and ACOG both describe a first stretch of spotting, longer or more frequent bleeding with a hormonal IUD, and heavier, more painful periods with a copper one. A tracker’s job in those months is to keep the dates straight, not to decide whether they are normal.
What is normal: for a hormonal IUD, irregular or more frequent bleeding in the first 3 to 6 months, then lighter periods or none at all; for a copper IUD, heavier and more painful periods in the first months. Planned Parenthood lists spotting, irregular periods and cramping as common side effects after a hormonal IUD is placed.
When it is worth a check, according to the NHS:
- Irregular or heavy bleeding that continues for longer than 6 months after a hormonal coil is fitted.
- Any bleeding pattern that worries you, at any point. A doctor or nurse would rather see you than not.
What to do: bring the record. A tracker that has kept your fitting date, your bleeding days and your spotting days turns a vague worry into a dated list, which is the thing a clinician can act on. Our irregular period guide covers what counts as irregular outside the coil’s settling window.
