A 60 second morning reading - no hormones, no guesswork
Trying to conceive shouldn’t feel this confusing
63% of women using Daysy to conceive did so in their first cycle. 89% within 3 months.*
*Based on Daysy user data.
FDA classified
HSA Class A
medical device
CE certified
Clinically validated
For women trying to conceive
If this feels familiar, you’re not imagining it
I’m dreading the next family gathering.
I’ve tried apps, strips, everything... and I’m still not sure what’s going on.
I’m worried I’m missing something important.
The month begins with hope, and ends with questions.
You look for patterns, track every shift, and try to piece together what your body is telling you.
But the signals don’t always line up, and the picture never quite feels complete.
What’s missing isn’t effort - it’s a way to see your cycle clearly, as it actually behaves.
Why timing feels uncertain
What actually affects your fertile window?
Most tools don’t measure what your body is doing today — they estimate based on what happened before.
Your cycle isn’t fixed
Even healthy cycles can shift. “Regular” doesn’t mean predictable day-to-day.
Your fertile window isn't just one day
Most women have a 5–7 day fertile window.
Timing matters more than a single prediction.
Apps look backwards
They predict based on past cycles — not what your body is doing right now.
OPKs don't tell the whole story
They detect an LH surge — not whether ovulation actually happened.
What you need is a signal from your body today — not a prediction from your past.
Before Daysy
Every month feels like stepping into the unknown again.
You’re hopeful, but also bracing yourself - trying to read every sign your body gives.
The tools you use point in different directions, and you’re left trying to make sense of the gaps between them.
After Daysy
You have one clear signal to return to each day.
A simple morning reading that doesn’t change its mind or contradict itself.
It doesn’t take away the hoping, but it gives that hope something steadier to rest on.
Daysy gives you clarity
A clearer way to move through TTC
Right now, you’re working with fragments - not a clear picture of your cycle.
With Daysy, you can see:
- When your fertile window is likely to begin
- Which days are best to try for a baby
- How your cycle behaves month to month
Daysy gives you a simple, hormone-free way to understand your fertile and non-fertile days as your data builds over time.
So you can try at the right moment - not just more often.
How it works
Know your fertile window
Daysy is a hormone-free, clinically validated device that helps you understand your fertile and non-fertile days with 99.4% accuracy*.
If you’re trying for a baby, it gives you a clearer picture of how your cycle behaves.
Most women see a clear pattern within 1–2 cycles. Every reading builds on the last - the longer you use it, the more precisely it knows you.
*Accuracy refers to identification of non-fertile (green) days (van de Roemer et al., 2021).
What you do
A 60-second temperature reading before you get out of bed.
What Daysy does
Analyzes your pattern as your readings build.
What you see
A simple colour system that shows whether your day is fertile, possibly fertile, or not fertile.
If you want the app
You can watch your cycle’s rhythm unfold in more detail.
Because when you’re trying to conceive, timing based on real data changes everything.
See if Daysy is right for you
FDA classified
HSA Class A
medical device
CE certified
Clinically validated
A simple routine
Clarity builds with every cycle you track
One small morning habit that builds a reliable picture of your cycle over time.
01
Measure
Take a 60-second temperature reading before getting out of bed.
02
Analyze
Daysy’s algorithm learns your cycle pattern and begins identifying your fertile window.
03
See the Signal
Red, green, or yellow lights show where you are in your cycle.
04
Watch the Pattern Build
After a week or two, your rhythm becomes clearer - so you can time things with more confidence.
Trusted by 500,000+ women worldwide
For women who are tired of guessing
I used the previous version for 2 years to prevent pregnancy, then got pregnant on the first cycle once we decided to try.
Kirsty Briscoe
Verified Daysy user
The fertile days were so precise that it worked out right in the first cycle. For me, Daysy was an absolute game changer to get to know my body better.
Ewald
Verified Daysy user
After a year of trying, I had Daysy for 2 full cycles before successfully getting pregnant. Daysy truly changed the game for us.
Alayjah Robbins
Verified Daysy user
Ready to time it right?
Know your fertile days with confidence
HSA Class A
medical device 30-day
risk-free return Free delivery
across Singapore
medical device 30-day
risk-free return Free delivery
across Singapore
Rated 4.7/5 by the global Daysy community
Rated 4.7/5 by the Daysy community
Secure checkout
One time purchase
No subscription
"With the help of Daysy, we conceived immediately."
Jennifer.
verified Daysy user
-
CE
certified -
HSA Class A
medical device -
FDA
classified -
2-year
warranty -
Free delivery
(3 days) -
30-day risk-
free return
FAQ
Questions women ask before trying Daysy
If something doesn't feel clear
(or you just want someone to walk through
it with you), we're here.
You're always welcome to ask
If you're trying to conceive and want to know the best days to try each cycle, Daysy is built for that. A 60-second temperature reading each morning gives you a clearer picture of your fertile window than apps or guesswork — and it works for cycles between 19 and 40 days, including cycles that vary month to month. If your cycles are consistently longer than 40 days, or a clinician has recommended medical evaluation, speak with them first. For everyone else, Daysy gives you real information to work with each month.
Most women see their cycle pattern emerge within one to two cycles. On average, Daysy users trying to conceive do so within 4.5 months — with 63% conceiving in the first cycle they try. It gives you accurate information about your fertile window, so you're trying at the right moment rather than just more often.
A peer-reviewed study of 5,328 users showed 99.4% accuracy in identifying non-fertile days. When Daysy shows green, your fertile window has passed for that cycle. It doesn't detect ovulation in real time or predict pregnancy, but it gives you a clearer rhythm to work with each month — something steadier than an app's guess.
Yes — and it handles variation better than most tracking methods. Daysy evaluates each cycle individually rather than averaging your history, so it adapts whether your cycle runs 28 days one month and 36 the next. Early cycles will have more yellow days as Daysy builds your personal pattern — that's the algorithm learning, not a limitation. If your cycles are consistently longer than 40 days, or your doctor has raised concerns, speak with them first.
Yes. The DaysyDay app is free to download and free to use with your Daysy device — no subscription, no monthly fee. Your S$449 is a one-time purchase that covers the device and the app.
Most apps predict your fertile window based on your cycle history — they tell you what has happened before, not what your body is doing now. Hormone-based tests (OPKs) detect a surge in the days before ovulation, but don't confirm when ovulation actually occurred. Temperature-based tracking works differently: your basal body temperature rises after ovulation, confirming it's happened, and over time reveals the unique rhythm of your cycle. Daysy's algorithm has been built on over 40 years of scientific research and measures to 0.018°C — precise enough to detect shifts standard thermometers miss.
No. Daysy isn't registered or sold as a contraceptive device and isn't designed to prevent pregnancy. Its purpose is to help you understand your cycle — including your fertile window — so you can make the most of the days that matter.
Trying to conceive can be complex and emotional, and Daysy isn't a guarantee. What it is is the clearest picture of your fertile window you can get — which gives you the best chance of trying at the right moment each cycle. If you've been trying for a while without success, a fertility clinician can help you explore what else might be going on. Daysy gives them, and you, real data to work from.
If something doesn't feel clear
(or you just want someone to walk through
it with you), we're here.
You're always welcome to ask