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Publisher · Checked October 15, 2026
The Bump
A pregnancy publisher with a week-by-week development timeline.
Best forA free week-by-week pregnancy timeline.
Who it's for
People with a due date, or who want a calculator, and who will treat the timeline as education.
The Bump's pregnancy app page says you enter a due date, or use their calculator, and get a timeline of fetal development. Last-period calculators can be off. An ultrasound date from your clinician is the date that should guide care.
Pros
The pregnancy app page describes a free tracker.
Available on the web and as a mobile app.
Cons
A last-period calculator can be off. An ultrasound date from your clinician should guide care.
