The NC° Thermometer Gen2 can save up to 30 temperatures, and you are able to sync temperatures for multiple days at once. To do this, open your Add Data page and click on the Bluetooth button on the thermometer while it is turned off to initiate the syncing.
You will then see a pop-up in the app letting you know that there are several un-synced temperatures. The temperatures will be listed with the date and time of each. You can unselect any of the saved temperatures if you don’t want a specific temperature to be synced to the app. Click Save in this pop-up, and all the selected temperatures will be synced to the Natural Cycles app.
Once your data has synced, remember to click on Save at the bottom of the Add Data page for today to ensure that today’s data is saved.
Please note that if you sync temperatures for multiple days, the algorithm will take all the new data into consideration, and you may see changes in your fertility status on the days when new temperature data was added. For that reason, we recommend that you try to sync your temperature every day instead of syncing multiple temperatures at once.
We write a bit more about adding data in the past here.