Inito fertility monitor & hormone tracker for women, predict & confirm ovulation with estrogen, LH, PdG, FSH

Description

The Inito fertility monitor is a urine-based hormone tracker that measures four hormones on a single test strip: estrogen (E3G), luteinizing hormone (LH), follicle-stimulating hormone (FSH), and PdG, the urine metabolite of progesterone. The reader syncs to a free app over Wi-Fi and gives you actual numbers rather than a smiley face. Since April 2026 it works with both iPhone and Android.

One ingredient in that list is the reason this device exists, and it isn't the estrogen or the LH. It's the PdG.

What Inito actually costs

We're putting this second because it's the question people arrive with and almost nobody answers plainly.

• The reader is a one-time cost and includes your first 15 strips. Inito lists it at $119 direct; Amazon pricing moves around, so check the current figure on the listing before you buy.
• Strips are $49 for a pack of 15, which covers one cycle for most people. Inito reports that 85% of users finish a cycle on a single pack.
• There's a 20-strip pack at $79 that reads both alpha and beta LH, for people whose LH peaks are subtle.
• Subscribe & Save takes 10% off, bringing a cycle to $44.10.
• The app is genuinely free. No subscription, no paywall, no locked features. That's less common in this category than it should be.

So the arithmetic almost nobody shows you. At Inito's list price, year one lands around $650 and every year after is about $588, or roughly $530 on Subscribe & Save. Whatever you pay for the reader, the strips are the real number. This is a razor-and-blades product, and the blades are the cost.

One thing that meaningfully changes that number: both the reader and the strips are HSA/FSA eligible. If you have either account, you're spending pre-tax dollars, which depending on your bracket knocks 20–30% off in real terms. Inito generates an invoice PDF in the app for reimbursement.

How it works

You dip a strip in first-morning urine, put it in the reader, and walk away. The reader photographs all four test areas at once and sends the result to the app over Wi-Fi. You get numbers and a chart, not a line to squint at.

The app tells you which days to test, which is how a 15-strip pack covers a whole cycle. You generally test through the fertile window to catch the estrogen rise and LH surge, then again after ovulation to look for a sustained PdG rise. Twelve to fifteen days of testing in a typical 28 to 30 day cycle.

On accuracy: a validation study of Inito's smartphone-connected reader reported roughly 96% correlation with laboratory ELISA assays for quantitative hormone measurement. That's a reasonable result for a home device. It is not the same as a blood draw, and it isn't a diagnosis.

Why women love it

• PdG confirms ovulation actually happened: the one thing an ordinary ovulation test cannot do
• Four hormones on one strip: no separate LH kit and PdG kit and the timing juggling that comes with two systems
• Real numbers, not symbols: you see the values and the shape of your own cycle, which is what makes a conversation with a provider useful
• Free app with no subscription: the recurring cost is strips only
• HSA/FSA eligible: pre-tax dollars, and the app produces the invoice
• iOS and Android since the April 2026 wireless reader
• FSH tracking for people who want a fuller view across the cycle

Best for

• Women with irregular cycles or PCOS, where a single LH reading is genuinely hard to interpret
• Anyone who has had positive ovulation tests but is not conceiving, and wants to know whether ovulation is actually happening
• Women coming off hormonal birth control who don't yet know their pattern
• People who want data to bring to a provider rather than a symptom diary
• Anyone with an HSA or FSA to spend, which changes the cost calculation materially
• Probably not worth it if your cycles are regular, predictable and you're three months into trying. See Mindy's note
• Not a pregnancy test, and not a diagnosis of PCOS, luteal phase defect or anything else

Related reading

Before you spend $600 a year on this, read Mindy's guide to the signs of ovulation, which covers what you can learn for free and where the free methods stop working. If PCOS is why you're here, how PCOS affects fertility explains why LH testing specifically misleads in PCOS. And the fertility workup guide is the one to read if you're weighing a monitor against simply booking an appointment.

Explore more

This monitor sits in our fertility & ovulation tests collection, curated by Mindy Motta, FNP-C. If you want to time intercourse and your cycles are regular, the Clearblue Digital ovulation kit does that for a fraction of the cost, and the Easy@Home strip kit is cheaper still per test. The broader fertility essentials for TTC collection covers supplements and support alongside tracking.

A quiet companion for the wait

Data helps right up until the point it becomes another thing to refresh at 6 a.m. Our fertility affirmation candles were made for the part of this that no chart improves.

A note from Mindy on what PdG actually tells you

Let me explain the one thing this device does that a $20 box of ovulation strips cannot, because it's genuinely useful and it's usually explained badly.

An ovulation predictor kit detects your LH surge. The LH surge is the instruction, not the outcome. It's your body telling the follicle to release an egg. Most of the time it does. Sometimes it doesn't, and that's called a luteinized unruptured follicle, and you would never know from an ovulation test, because the test already showed positive.

PdG is the urine metabolite of progesterone, and progesterone only rises meaningfully after the follicle has actually released and become a corpus luteum. So a sustained PdG rise a few days after your LH peak is real evidence that ovulation happened. That's a genuinely different claim, and it's well supported: urinary PdG confirms ovulation in more than 98% of women in validation work, and three consecutive readings above threshold after the LH surge have shown high specificity against ultrasound-confirmed ovulation.

This matters most in PCOS, and if you have PCOS this is the paragraph to read twice. In PCOS, LH is often elevated at baseline and can surge more than once in a cycle without ovulation following. Ordinary ovulation strips can show positive repeatedly and mean nothing. A hormone monitor that measures PdG afterwards is one of the few home tools that gives you a real answer.

Now the part I'd want said before you buy. If your cycles are regular, arriving every 26 to 32 days with a consistent luteal phase, you are almost certainly ovulating. Regular cycles are themselves strong evidence of ovulation. Spending $588 a year to confirm what your calendar already tells you is a real thing people do out of anxiety, and I'd rather you didn't. If you've been trying for three months with predictable cycles, the honest answer is that three months is not a long time and a $20 pack of strips does what you need.

Two more boundaries. PdG confirms ovulation. It does not diagnose a luteal phase defect, which is a contested entity to begin with, and it does not replace the serum progesterone your provider might order. And a monitor doesn't treat anything. If it shows you're not ovulating, the value was in learning that, and the next step is a provider, not another cycle of testing.

Which leads to the line I'll keep repeating on this site: twelve months of trying, or six if you're over 35, means it's time to be seen. A monitor is not a substitute for that appointment, and I've watched people spend a year and $600 gathering data they could have brought to a workup in month one. If you're already at that threshold, book the appointment and bring whatever data you have.

Last thing, and it's practical rather than clinical. Use your HSA or FSA if you have one. Both the reader and the strips qualify. That's not a small adjustment on a recurring $49.

— Mindy Motta, FNP-C

FAQs

How much do Inito test strips cost?

$49 for a pack of 15, which covers one cycle for most people, or $79 for a 20-pack that reads both alpha and beta LH. Subscribe & Save takes 10% off, bringing a 15-pack to $44.10. Strips are sold through Amazon and the Inito app. That works out to roughly $588 a year ongoing, or about $529 subscribed, and both the strips and the reader are HSA/FSA eligible.

How many strips do I need per cycle?

Twelve to fifteen for a typical 28 to 30 day cycle, and Inito reports 85% of users finish a cycle on a single 15-pack. The app tells you which days to test so you're not burning strips on days that don't matter. Longer or irregular cycles use more, so PCOS and post-pill cycles may need a second pack in some months.

How does the Inito fertility monitor work?

You dip a strip in first-morning urine and put it in the reader. The reader photographs all four test areas in a single image and sends results to the app over Wi-Fi. You get actual hormone values and a chart rather than a line or a symbol. The app schedules your testing days and flags both your fertile window and, afterwards, whether PdG rose enough to confirm ovulation.

What is the total cost of Inito in the first year?

Around $650 at Inito's list price of $119 for the reader with its first 15 strips, plus roughly eleven more cycles of strips at $49. On Subscribe & Save it's closer to $600. Every year after that is about $588, or $529 subscribed. Amazon's price for the reader varies, so check the listing. Using an HSA or FSA reduces the effective cost by whatever your tax rate is.

Does Inito work with Android?

Yes, since April 2026. The InSight Wireless Reader is a standalone device that syncs over Wi-Fi and works with both iOS and Android. The older reader clipped onto the phone and used its camera, and that version was iPhone-only. If you're looking at a listing that specifies an iPhone model, it's the previous generation.

Is Inito a pregnancy test?

No. It measures estrogen, LH, FSH and PdG, none of which is hCG, which is the hormone a pregnancy test detects. Inito can show you a PdG pattern that stays elevated past when your period was due, which some people read as a hint, but it isn't a pregnancy test and shouldn't be used as one. Take an actual pregnancy test.

What does PdG tell me that an ovulation test doesn't?

Whether ovulation actually happened. Ovulation tests detect the LH surge, which is the signal to release an egg, not confirmation that one was released. PdG is the urine metabolite of progesterone, which rises only after the follicle has released and formed a corpus luteum. A sustained PdG rise after your LH peak is real evidence ovulation occurred. This matters most in PCOS, where LH can surge repeatedly without ovulation following.

Is Inito worth it if my cycles are regular?

Often not. Regular cycles arriving every 26 to 32 days with a consistent luteal phase are themselves good evidence that you're ovulating, and a $588-a-year monitor mostly confirms what your calendar already shows. If you're a few months into trying with predictable cycles, an ovulation test kit at a fraction of the price does what you need. Inito earns its cost when cycles are irregular, when you suspect you're not ovulating, or when you've had positive ovulation tests without conceiving.

Can Inito diagnose PCOS or a luteal phase defect?

No. It measures hormones; it doesn't diagnose conditions. It can make an unusual pattern visible and easier to discuss with a provider, which is genuinely useful, but PCOS is diagnosed clinically using established criteria and luteal phase defect is a contested entity that a home urine test can't establish. If the data looks odd, that's a reason to book an appointment rather than to keep testing.