Two mechanisms, one bundle. Daysy reads your basal body temperature to identify the ovulation phase. Proov measures PdG (progesterone metabolite) to confirm the ovulation actually completed. Together, the picture is complete.
Most TTC tools give you one signal and ask you to trust it. Daysy plus Proov gives you two signals that read the cycle from different angles and confirm each other.
Oral basal body temperature, ±0.05°C precision, read the moment you wake. The algorithm identifies the ovulation phase itself. Red / yellow / green light output, refined against 40 years of cycles.
Urine PdG (progesterone metabolite) strips, tested days 7-10 after suspected ovulation. FDA-cleared to confirm successful ovulation, not just LH surge. Real data on the second half of the cycle.
Together, the bundle answers "did I ovulate?" AND "did the ovulation produce enough progesterone?" One question no other cycle tracker answers on both sides.
Inito and Mira measure LH, PdG, E3G, and FSH from urine strips. That's hormone-level precision, but every reading costs a strip (~$75-100 per cycle, ongoing). This bundle gives you Daysy's one-time-purchase BBT signal PLUS Proov's PdG confirmation. Ongoing cost is lower after the first cycle; you can refill only when you want additional confirmation. Different economics for a similar-quality picture.
Typically 2 to 3 full cycles for the Daysy algorithm to fully calibrate to you. The Proov PdG strips give you actionable confirmation data starting cycle one, so even during Daysy's learning phase you're not flying blind.
The Daysy algorithm handles missed readings without resetting. The Proov strips are tested days 7-10 post-ovulation, independent of morning-reading discipline. Missing one Daysy reading in a critical week does not compromise the PdG confirmation.
Daysy is designed for cycles between 19 and 40 days, including irregular cycles within that range. The bundle helps particularly for irregular cycles because the Proov PdG data confirms whether ovulation actually happened, independent of when the algorithm expected it. If your cycles are consistently outside 19-40 days, Daysy is not the right tool.
30 days from delivery, both devices, no restocking fee. If the bundle isn't right for you, send it back for a full refund. Proov strips returned unused count toward the refund; strips used during trial do not.
Daysy + Proov TTC bundle · $359 · One-time purchase. Includes 5 PdG strips. Free US shipping. 30-day money-back guarantee.
Add bundle to cart · $359Ancient knowledge, modern technology, honest confirmation.