Can your phone prevent pregnancy? flo app trial recruits 3,800 women
NCT ID NCT07630064
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study is testing whether the Flo app, when used with an Apple Watch that measures wrist temperature overnight, can help women prevent pregnancy without hormones or devices. About 3,800 women in the US will use the app as their only birth control for up to 13 cycles. The app tells them which days they are fertile and should use protection.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- Flo Digital Contraceptive app (software as a medical device) used with an Apple Watch for temperature tracking
- What this could lead to
- If successful, this could provide a hormone-free, non-invasive contraceptive option that helps women prevent pregnancy using only their smartphone and a smartwatch.
- What could go wrong
- This is a single-arm study with no comparison group, and effectiveness depends on consistent daily use. The app may not work as well for women with irregular cycles or those who forget to wear the watch.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for CONTRACEPTION USE are added.
By submitting, you agree to our Terms of use
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Lindus Health
RECRUITINGBoston, Massachusetts, 02111, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.