Preorder Femometer Vinca II, Ivy & Butterfly now and get them in Early August. We appreciate your love~
Femometer Vinca II
Femometer Vinca II
Femometer Vinca II
Femometer Vinca II
Femometer Vinca II
Femometer Vinca II

Femometer Vinca II

Smart Basal Thermometer for Fertility & Pregnancy Tracking

Vinca II is designed so you don't even have to open your eyes to measure your BBT. For those of you who want to know your temperature as soon as you measure, her delicate design includes an additional LCD screen. She sends all the readings straight to the app once you open it later, but she'll store this data for you until you're ready. Vinca II also has 50% more battery capacity.

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    Why Vinca II?

    • "Precision & efficiency does matter"

      Your reading can be completed in as little as 30 seconds once Vinca II is familiar with you. With a precision of 0.09℉, you can track the smallest of fluctuations. Vinca II draws you a clear map of your BBT, so whether you're looking to get pregnant, or know your 'safe zone', Vinca II can help you.

    • "SSSHHhhhhhhhh!"

      Vinca II beeps to let you know that she's on or off, or that she just finished taking a reading. You can adjust the volume level in app in case you're worried about waking up Sleeping Beauty...

    • "Subtle & Sweet"

      Vinca II is designed to be discreet. It looks just like a lipstick, so no one will ever know that you are trying to pinpoint your ovulation unless you want them to.

    • "Data always know where & when to go"

      Data captured. Data saved. Time recorded. Done.

    Work hand in hand with Femometer App

    Use it as a daily log of your cycle. Never forget things.
    Access to your measured data & BBT chart.
    Personal insights & health tips just for you.

    Learn More

    How to use Vinca II

    A Smart Basal Thermometer

    Get pregnant faster, avoid pregnancy naturally or just get to know your menstrual health better.

    Watch the Video
    • Download our app, uncap the Femometer Vinca and pair via bluetooth. No need to pair again next time.

    • Put the metal tip of the Vinca II under your tongue, keep you mouth closed and try not to move the themometer around. When you hear three beeps, you've successfully measured your BBT. Now repeat this every morning - before you get out of bed and after at least 6-8 hours sleep.

    • The Femometer app learns from every piece of data you input and calculates your conception rate for each day. The app then provides personlized insights so you can prepare for your fertile window.

    Download our app right now

    Measure, track & learn everything related to your cycle.
    Understand (and love) your menstrual health.

    Product specs

    • Measurements & Dimensions


      Product Name: Femometer Vinca II
      Model: FM-VC-201
      Size: 12o.2mm*24.4mm*16.4mm
      Weight: 24.8g(without Battery)
      Transmission distance: Up to 16 feet
      Measurement: 89.6℉ - 107.6℉
      ±0.09℉ (95℉- 100.4℉)
      ±0.18℉(89.6℉ - 95℉) & (100.4℉ - 107.6℉)
      Battery: CR2032
      Receiver: Apple Devices: iphone 5 or above with version at lease IOS 8.0; iphone 4/4s excluded. Android devices: 4.3 or above and supports Bluetooth 4.0/4.1
      Battery endurance: 3-6 months
      Operating conditions: 41℉ - 104℉

    • Materials & certification


      Femometer is made by imported ABS material, Seiko Hall IC, 24-digit high accuracy data collection chip, low-energy Bluetooth chip as well as other finest materials, along with the finest craftsmanship, to help deliver the best quality a thermometer can be.

    • Shipping


      Standard shipping fulfilled by Amazon, generally in 3-5 days. Free shipping for orders over $30. $10 shipping fee for orders of $30 & below. Free return & refund.

    • Warranty


      This product is warranted from manufacturing defects for one year from the date of retail purchase. It does not cover damages or wear resulting from accident, misuse, abuse, commercial use or unauthorized adjustment and repair of the product. Please direct all returns to the place of the original purchase and retain your original receipt, as you may be asked to provide a copy as the proof of the purchase. Please contact for further information.

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