Period Calendar Period Tracker vs Running Center
Side-by-side comparison for Android — updated April 2026
About Period Calendar Period Tracker
★The rating 4.9★ period calendar! Popular in 63 Countries. Trusted by 300 million Users. Keep track of your menstrual cycles with Period Calendar. It tracks your periods, blood flow, cycles, ovulation and the chance of conception. Period tracker helps both women looking to conceive and those...
About Running Center
You're loyal. You shop local, stay active, and should get rewarded for it. We want you to be part of the Running Center Loyalty Program. It's simple and free, just download the app and login. Shop in the app or in our store and you'll earn reward points for every dollar you spend. You'll also get...
Verdict
Period Calendar Period Tracker has a rating of 4.9. Running Center has 500+ downloads. Both apps are available for free download on Google Play Store. Try both to see which works best for you.