10 Best Free Ovulation & Fertility Tracker Apps for iPhone
Updated November 2, 2026 · written by AppHunt
An ovulation tracker app tries to tell you which days are fertile, and it can go about it in four ways. A calendar count works back from your expected period, which is rough. LH test strips pick up the hormone surge that comes a day or two before the egg is released, basal body temperature shows the small rise that follows, and some apps now add wrist temperature from a watch. The apps below differ in which signals they use, whether the phone camera reads your strips, what stays free, and where your log is kept.
Rivula
AppHunt partner · promo codeRivula gives your fertile window and ovulation as a range rather than one fixed day, and the range tightens with each cycle you log. Positive LH tests and temperature readings adjust it; a recent Apple Watch (Series 8 up, or an Ultra) can pass wrist temperature in through Apple Health to help confirm it. No sign-up, no ads, and the journal stays on your iPhone. Everyday tracking is free, and Pro (temperature and LH charts, pattern insights, doctor PDF) is free with the AppHunt promo code on this page.
Good for: Trying to conceive without handing over an account
Glow
The most-rated ovulation app in the US store. Glow estimates when you are fertile and when you ovulate from what you log, lets you add basal temperature, cervical mucus and sex, and wraps it in a large community of people trying to conceive. It syncs with Apple Health. The developer presents it as an aid for planning a pregnancy, not as contraception.
Good for: Trying to conceive with a community around you
Keep in mind: Glow says you can download and use the app at no cost. Glow Premium, a paid upgrade, adds advanced cycle and temperature charts, cycle analysis, forecasts and private messaging; US prices in the listing run from $15.99 to $99.99 (US App Store, November 2, 2026; may change). Several 2026 reviews mention ads and upgrade pop-ups, and one says older logs needed a subscription.
View in the App Store
Femometer
Built around charting fertility signs. You record basal temperature, LH and pregnancy tests and cervical mucus, and Femometer draws temperature and LH curves, predicts ovulation and your next period, sends reminders and exports a PDF for your doctor. More than 200 symptoms can be logged. It connects to Apple Health and supports Face ID. Reviews also mention a Bluetooth thermometer from the same maker.
Good for: Charting temperature and LH tests in detail
Keep in mind: The listing doesn't say which features stay free. It lists Prime subscriptions from $6.99 a week to $49.99 a year, plus separate unlocks such as an Ovulation Calculator at $9.99 and Advanced Fertility Insights at $29.99 (US App Store, November 2, 2026; may change). Reviews from 2025 and 2026 talk about paying for it, and one mentions ads for the maker's new smart ring. No device is required according to the listing.
Is Femometer free? Price & free alternatives →View in the App Store
Premom
Made by the company behind Easy@Home test strips, and the app to pick if LH tests are your main tool. Photograph a strip and Premom measures the lines to give a low, high or peak reading, charts it next to basal temperature and updates the fertile window. A partner can be linked, and a pregnancy mode takes over after a positive test. Reviews say strips from other brands work too.
Good for: Reading LH strips with the camera
Keep in mind: Premium is a subscription (listed US prices $9.99 to $37.99) for fuller reports, personalized content and expert webinars (US App Store, November 2, 2026; may change). A reviewer on October 31, 2026 says the free version covers tracking LH tests; several October 2026 reviews say pregnancy-week content now needs a subscription, and a 2025 review says the same of its AI questions.
View in the App Store
Pregmate
A tidy tracker from a test-strip brand. Its camera scanner reads an LH strip, shows the ratio of the test line to the control line so you can see how near the peak you are, and files every photo under the cycle day. You can also log temperature, cervical mucus, sex and pregnancy tests, and a pregnancy mode starts when a test turns positive.
Good for: Photographing LH strips and watching the surge build
Keep in mind: Rated 17+. Pregmate Pro, a subscription with listed plans from $9.99 to $69.99 and a $49.99 one-time offer, adds cycle reports and symptom analysis by phase (US App Store, November 2, 2026; may change). The listing doesn't say exactly what is free; a September 2025 review calls the free version better for simple tracking. The scanner is built mainly for the brand's own strips, with most standard strips working, says the developer.
View in the App Store
Kindara
Fertility-awareness charting for people who like reading their own signs. You enter temperature, cervical mucus and position, tests and sex, and predictions come from your own entries, not from population averages. Charts can be shared with a partner or clinician, cervical mucus can be added from Apple Watch, data syncs with Apple Health, and a community looks over each other's charts.
Good for: Charting fertility signs the awareness-method way
Keep in mind: Last updated September 2021, though reviews from late 2025 still praise it. New accounts get 45 days of Premium with no card, then drop to a Basic tier; Premium ($4.99 a month or $49.99 a year) adds unlimited custom fields, moods, a lunar calendar and private messages (US App Store, November 2, 2026; may change). A November 2025 review says Basic had everything the reviewer needed.
View in the App Store
Fertility Friend
The long-standing name in fertility charting, around for more than 25 years. Log temperature, cervical fluid, LH tests and symptoms and it draws your chart, works out the day ovulation probably happened and marks fertile days. Lessons, quizzes and a gallery of over 240,000 shared charts teach you how to read them. It also takes in data from Apple Health and Oura.
Good for: Learning to chart your fertility signs properly
Keep in mind: Rated 17+. The developer lists automatic ovulation detection, the chart, the calendar and the learning library as free, with no ads and no selling or sharing of data, and gives a free month of premium features, no card needed. VIP, the paid tier, adds deeper analysis, a pregnancy tracker and a private community; listed US prices are $10.99 for 30 days, $21.99 for 90 days and $45.99 a year (US App Store, November 2, 2026; may change).
View in the App Store
Ovulation Calculator
A plain ovulation calculator that grew out of a website. Enter your cycle details and it marks the fertile window and your best-odds days on a calendar; you can also log temperature, cervical mucus, cervix position and LH test results and see them on a chart. Daily tips, reminders and a forum of others trying to conceive come with it.
Good for: A no-fuss ovulation calendar
Keep in mind: Last updated in March 2017 and written for iOS 8, so expect an old look; reviews from 2025 still praise its dates, and one from November 2024 asks if it will ever be updated. The developer says the app costs nothing to get or use, and the listing shows no in-app purchases.
View in the App Store
FEMM
From the FEMM Foundation, which teaches fertility-awareness charting. You record cycle days, cervical fluid, symptoms and medicines, then read them in calendar, chart or detailed-chart views, and you can email or print the charts for a doctor. It suits people who want to learn how their hormones behave, whether they aim to conceive or simply understand a cycle, and it offers a knowledge base.
Good for: Learning to read your cycle, not just count days
Keep in mind: No in-app purchases are listed and the app is rated 4+. The listing is about charting your signs and doesn't describe automatic fertile-window predictions; reviews from late 2025 and 2026 ask for a calendar view, predictions and bigger text.
View in the App Store
Fertility & Period Tracker
More calculator than diary. Give it the start date of your latest period, your usual cycle length and your luteal phase, and a calendar shows the predicted ovulation day plus your most and least fertile days, which suits regular cycles best. It also offers two baby-gender timing methods, which the developer itself calls probabilities, not promises, and syncs with Apple Health.
Good for: A quick fertile-day calendar
Keep in mind: The basic calendar is free. A one-time Full Version for $2.99 adds a daily pregnancy probability, gender probabilities, an overall chance for the cycle and Health syncing across your devices, per the developer (US App Store, November 2, 2026; may change). It needs iOS 26 or later and was last updated in February 2026. Date-counting alone is not reliable contraception, though the listing mentions avoiding pregnancy.
View in the App Store
Questions and answers
Is there a free ovulation tracker app with no subscription?
Yes, several, if what you want is a free fertility app with no subscription attached. Rivula charges nothing for logging, fertile-window and ovulation predictions, reminders, widgets, backups or Apple Health sync, and Pro is optional. FEMM and Ovulation Calculator list no in-app purchases at all, though the second has not been updated since 2017. Fertility Friend and Kindara keep their charting free and sell extra analysis, and Glow says you can use it at no cost. Check the paid extras before you commit, since they differ a lot.
How do ovulation tracker apps know when you ovulate, and how accurate are they?
They use up to four signals. A calendar count assumes ovulation comes roughly two weeks before the next period, which is a guess that misses by days when cycles vary. LH test strips catch the hormone surge that comes a day or two before the egg is released, basal body temperature rises slightly after ovulation and so confirms it late, and wearables add skin or wrist temperature. The more signals an app combines, the better its estimate, but it remains an estimate. A tracker is also not birth control unless it has been cleared as such.
Is Natural Cycles free?
No. Natural Cycles: Fertility App is free to download, but the developer says a monthly or annual subscription unlocks the core features; US prices were $21.99 a month and $149.99 a year (US App Store, November 2, 2026; may change). It is cleared by the FDA as birth control and also has a mode for planning a pregnancy, using temperature from a band, a thermometer or a compatible wearable. Because there is no ongoing free tier, it is not on this list.
Do I need a separate app if I have Apple Health Cycle Tracking?
Not necessarily. Cycle Tracking in the Health app is free, predicts your period and a fertile window, and with a Series 8 or newer Apple Watch, or an Ultra, uses sleeping wrist temperature to estimate after the fact when ovulation happened. Health works as a basic period and ovulation tracker; a dedicated fertility tracker app adds things it lacks, such as LH test logging, temperature charts and fertility education. Rivula, Premom, Fertility Friend, Kindara and Glow can all exchange data with Health, so you do not have to choose.
Which ovulation apps read LH test strips with the phone camera?
Premom and Pregmate. Premom measures the lines on a photographed strip and gives a low, high or peak reading; Pregmate reads the test and control lines and shows their ratio, and works best with its own strips. Femometer, Fertility Friend, Kindara and Rivula let you record the result yourself, and Femometer and Premom chart it. Reviews say photo readings are an aid, not a lab result, so check the strip itself when the line is faint.
Why is Rivula first?
Rivula is made by the AppHunt team, so it takes first place; this is not a rating-count ranking like places 2–10. We built it for people who want predictions without an account or ads, and it shows ovulation as a range that narrows as you log. The promo code on this page makes Rivula Pro free as well.
How do I use the Rivula promo code?
Tap Get on the Rivula card. If you are not signed in to AppHunt you will be asked to log in, and the code appears right after. Redeem opens the App Store's own redemption screen with the code filled in.
How is the list ordered?
Places 2–10 are ordered by the number of ratings each app has in the US App Store, one app per developer. Only apps that are about ovulation or trying to conceive and keep tracking free with no time limit qualify; trial-only and subscription-only apps are left out, as are apps that need their own device. The count shows how many people use an app, so there is no single best ovulation tracker app for everyone. General cycle trackers such as Flo and Clue are in the period list. 10 best free period tracker apps