This is AMAZING In general: I love this product. One star off is for two things: one - the bracelet is sooo tiny it basically was worn out within the first year and I had to replace it. And the other point - sometimes I have an issue with the app telling me “problem to read data” - I just have to synch it more often and it works. Just a bit annoying. Over all - great product. I have only used the regular version of it (not with guarantee) since reading and doing research about this product - I believed (& believe) it works. Otherwise they would not offer money back guarantee. Best purchase ever. If you don’t have PCOS etc. this is a perfect hormone free birth control solution. But you have to be using it regardless & never unprotected intercourse with strangers ! This is my second pregnancy with the help of Ava ! Thank you so much.

Good for TTC, garbage for tracking pregnancy I've used it consistently for 6 months in order to become pregnant. Prediction of ovulation was correct. Removing 1 star because the braclet band is cheap and the little loops to hold the bands together both broke by 3 months. Another star removed because it is a garbage pregnancy tracker. If you input the conception date (which is in your data! And more accurate that 1st day of last period) it starts acting like conception date is date of last period, so 4 weeks behind. Stupid. And having to toggle back and forth between week groups is annoying, particularly when the scale for your data increases/decreases is visually different from month to month. Expected much better after the TTC interface was so good.

Not worth the price point I have struggled with several nights of lost data due to the device not syncing properly. The bracelet is also not as durable as expected (one of the silicone clasps broke after one month of wear). I have used a free phone fertility app concurrently with Ava and I have actually found the free app to be more accurate. Once transitioning to pregnancy mode in Ava, I was asked questions that the application should have already known due to it being logged in the system (first date of my last menstrual period). Overall disappointed with the service for the price tag.

Great fertility tracking! This watch makes it super convenient to track multiple inputs to fertility. I LOVE the data it gives me and it’s the only app that shows cycle over cycle history overlaid like Ava does which allows me to look at each metric over every cycle to compare. 4 stars due to: Periodically the articles will open in French. When you are pregnant and turn on the pregnancy setting, you lose access to the history tracking I called to above.

DON'T WASTE YOUR MONEY DON'T WASTE YOUR MONEY, IT'S A RIP OFF: the customer service is silent and inactive, when it does reply after making me wait for 3 weeks, it is unwilling to refund or replace the product which was still under guarantee. I am shocked for a Swiss company! I bought the bracelet in August 2022. After using it less than 6 times, so almost 2 weeks later, the bracelet started malfunctioning and did not charge properly. I contacted the customer service by email (they have no phone number) several times and waited for at least 3 weeks before receiving a proper reply. I asked to replace the product or refund me. They advised me to do some manipulations, which I did. The bracelet still did not work. I sent them all the photos, videos, and all proof that it was not working, and asked again for a refund. Again, their reply every 3 weeks is: do these xyz manipulations and it will work. Of course, everything they suggested me did not work. I paid USD 300 for this fertility bracelet which stopped working in less than 2 weeks!