No, you cannot use two devices at the same time with Natural Cycles. There can be a small difference in how different devices measure (even if it's the same type of device), so temperature values will differ between each device.
This means that you cannot alternate between measuring with two different thermometers, or mixing different types of measuring devices.
The Natural Cycles algorithm analyzes small - but significant - changes in temperature. Using two devices can cause false temperature fluctuations, which can make it more difficult for the algorithm to analyze your cycle and detect your ovulation.
What if I need to change devices?
If you decide you want to switch devices, there’s a few things to keep in mind:
- For a better experience, we recommend only switching measuring devices at the start of a new cycle.
- Please keep in mind that you should avoid switching measuring devices too often - not only to stay in the habit of measuring with your chosen device, but also because this may otherwise delay ovulation detection and cause more Red Days (NC° Birth Control) or Brown Days (NC° Plan Pregnancy).