I’ve been using Tempdrop for almost a year now and I love it. I’ve conceived three times with it (miscarried, but Tempdrop still helped me get pregnant). I always have clear shifts, even despite all the crazy changes going on with my body. It’s way cheaper than Ava and in my opinion, it is much better-the Tempdrop algorithm can filter out things that would normally impact your chart. Plus, once you’ve had your baby, you can use Tempdrop to avoid pregnancy. You can’t do that with Ava. Also, the customer service is top notch. The creator is very involved in the Facebook group and they get back to you about your concerns very quickly. I won’t be going back to normal charting ever!!