The Best Hormone Tracker Apps of 2026

Last updated 26 October 2026, by the Hello Phase team. Prices and ratings re-checked 26 October 2026.

Side by side

Estimated or measured, which hormone tracker do you need?

Every app here falls into one of two groups that many lists blur. Inito, Mira, Proov and OOVA read a urine test strip and report LH, which surges before ovulation, plus E3G and PdG, the forms of estrogen and progesterone found in urine. Hello Phase, Moody Month, Stardust, Clue and Flo use no strips and estimate where you are in your cycle from the period dates you log.

The difference matters most around ovulation. A study comparing urine with blood found that "The rise in estrogen and LH always occurred before ovulation" and "the progesterone rise from baseline always occurred after ovulation", so a strip app can watch LH climb and then use PdG to confirm that ovulation happened. MedlinePlus calls a positive LH test "a sign that ovulation may soon occur", and Cleveland Clinic says that is "usually within 36 hours".

A calendar estimate cannot see any of that, because it assumes ovulation lands at a set point, and Hello Phase, for example, places it about 14 days before your next expected period. Real cycles vary more than that. The NICHD says ovulation "can occur anywhere between 10 and 21 days" after a period starts, a 2020 study found luteal phases that differed by more than 3 days between cycles in 58.8% of women, and in a large app dataset funded by the maker of Clearblue "only 12.4% of users actually had a 28-day cycle." A 2026 study using Mira also found cycles without ovulation in 11% of regularly cycling participants, which no calendar can notice.

Who should pay for test strips?

Strips are worth it if you are trying to conceive and want to see your LH surge and confirm ovulation with PdG, or if your cycles vary so much that calendar predictions keep missing. They make less sense if you mostly want to understand your month, since Inito strips alone run about $39 to $49 a cycle. Strips also measure urine rather than blood, and the brand studies we found are small, with 52 women in Mira's ultrasound comparison and four in its blood comparison.

Apps that measure your hormones

All four apps are free to download, and what you pay for is the reader, the strips or both.

How much do test strip hormone trackers cost in a year?

Strips run out every cycle, so the starter price is only part of the bill. Where a brand publishes enough numbers we worked out a rough yearly figure, and otherwise we show kit and refill prices only.

Apps that estimate your hormones from your cycle

These apps use no strips, so what they show about hormones is a model of a typical cycle fitted to the dates you log. Bearable is here because it also works without strips, although it has no hormone data at all.

Can an app tell your hormone levels without a test?

No, an app cannot tell your actual hormone levels without a test. It can only draw the pattern that is typical for a cycle of your length, which is enough for planning your week or seeing how your mood lines up with your cycle, and as MedlinePlus puts it, "It is hard to know exactly when ovulation will happen." Wearable temperature, which Stardust can use, adds a real body signal, and Natural Cycles researchers wrote that "it is important to track physiological parameters such as basal body temperature and not just cycle length", but temperature is still not a hormone reading.

No hormone test settles everything either. IAPMD says "PMDD or PME cannot be diagnosed through blood, hormone, or saliva tests", so if mood changes before your period worry you most, our guide to PMDD tracker apps is the better place to start.

Are hormone tracker apps private?

Some are far more private than others, and price does not predict which. Apple's privacy labels are filled in by each developer rather than independently audited, and on those labels OOVA and Proov link no data to you and declare no tracking, while Inito links only your contact info. Mira, Moody Month, Stardust, Clue, Flo and Bearable all declare "Data Used to Track You", and in 2021 the FTC finalized an order with Flo over allegations that it shared sensitive health data with Facebook and Google.

Hello Phase has no Apple label because it is not in the App Store. It needs no account, keeps your logs on your phone, shows no ads, and its Google Play Data safety section says no data is shared with third parties. There is no cloud backup, so export a file before you switch phones, and our FAQ lists what the optional AI coach sends once you agree.

Apps we left out and why

Hormona: Period Tracker. It is rated 4.72 from 758 US ratings, Hormona+ costs $69.99 a year, and its site sells at-home urine hormone kits. On 26 October 2026 we could not find the kit price or US availability on its homepage, so we could not compare its real cost.

TALIA: Menopause & MHT Tracker. Its Apple label says "Data Not Collected", but it had no US ratings on 26 October 2026, so it is too new to rank.

Cycle syncing apps. 28, Lively and Harmony center on workouts and food by phase, and we compare them in our best cycle syncing apps guide.

How to choose

• If you are trying to conceive or want proof that you ovulated, choose a strip app, where Inito suits most people and Proov costs least to start.
• If you want a hormone chart without strips, start with Hello Phase on Android, or Moody Month or Stardust on iPhone.
• If you already wear an Apple Watch or Oura, Stardust can add your temperature to its estimate.
• If privacy comes first, OOVA and Proov have the cleanest Apple labels, and Hello Phase keeps your data on your phone with no account.
• If symptoms matter more than hormones, Bearable shows what tends to go with them.

Questions people ask

Sources

1. Roos J et al. 2015, urine hormones compared with serum around ovulation, Eur J Contracept Reprod Health Care
2. MedlinePlus, LH urine test, reviewed 22 May 2025
3. Cleveland Clinic, Ovulation, updated 18 March 2026
4. NICHD, About menstruation
5. Najmabadi S et al. 2020, cycle and phase length variability, Paediatr Perinat Epidemiol
6. Soumpasis I et al. 2020, real-life ovulation timing, Hum Reprod Open (funded by SPD, maker of Clearblue)
7. Bouchard T et al. 2026, Mira compared with ultrasound, Reprod Biomed Online
8. Usala SJ et al. 2024, Mira compared with serum in four women, Medicina
9. Bull JR et al. 2019, 600,000+ cycles from Natural Cycles users, npj Digit Med
10. MedlinePlus, Ovulation, reviewed 17 March 2026
11. IAPMD, symptom tracker
12. FTC, order with Flo Health, June 2021
13. Inito, buy now and FAQ, checked 26 October 2026
14. Mira, shop, checked 26 October 2026
15. Proov, shop, checked 26 October 2026
16. OOVA, Fertility Kit, checked 26 October 2026
17. OOVA, Perimenopause Kit, checked 26 October 2026
18. Moody Month FAQ, checked 26 October 2026
19. Stardust FAQ, checked 26 October 2026
20. Clue Plus, checked 26 October 2026
21. Flo help center, free and premium features
22. Bearable, our pricing and principles
23. Hormona, homepage, checked 26 October 2026
24. Hormone Tracker - Hello Phase on Google Play
25. Hello Phase pricing and Hello Phase privacy policy

Ratings, prices, privacy labels and quoted reviews come from each app's US App Store and Google Play pages on 26 October 2026.

Try the free hormone chart

If you are on Android and want to see an estimated hormone chart for your own cycle before buying strips, Hello Phase is free and needs no account. The pricing page lists what Plus adds.

Hello Phase is for tracking and learning about your cycle. It is not a contraceptive and it does not diagnose medical conditions.