First Windows Phone 7 Genealogy App

Saturday, 25 Sep 2010 | by Mark Tucker

I am excited to announce what might be the very first genealogy app for the soon-to-be released Windows Phone 7.

It is a graphical cousin calculator that can determine the relationship between two individuals by knowing the relationship of each to their closest common ancestor.

With just a few taps and drags, you can determine the relationship of any two people.



The application is in final development.  Please provide feedback.


  1. [...] This post was mentioned on Twitter by Mark Tucker, Colleen Method. Colleen Method said: RT @marktucker: First Windows Phone 7 genealogy app: Cousin Calculator – #wp7 #genealogy [...]

    Pingback by Tweets that mention First Windows Phone 7 Genealogy App | ThinkGenealogy -- — 25 Sep 2010 @ 6:53 pm

  2. Wow…Now I need to go get an updated phone… Great job… Tina

    Comment by Tina Sansone — 25 Sep 2010 @ 8:32 pm

  3. Dear Mark, All the relationships you mention are of the half blood. You mention brothers and sisters, but you say they descend from a parent. You mention first cousins and say they descend from a grandparent.

    You need a couple to have the relationships you mention. I have been trying for years to get this straightened out on the internet where copiers are at work copying that wonderful cousin graph over and over.

    So how about a cousin whom you share only a grandfather with. That would be a half-first cousin. If one would think of an grand parental COUPLE instead of a single ancestor, that would correct the situation. YOu might argue that going way back it doesn’t matter by much, reducing the ancestral connection by 1/2 of a very little bit. But in genetic counseling where half siblings mean a great deal, compared to full siblings, it is a dreadful mistake.

    Yours truly,

    THomas H. Roderick, Ph.D.
    Bar Harbor, Maine

    Comment by Thomas Roderick — 27 Sep 2010 @ 7:11 am

  4. Thomas,

    I appreciate your feedback. Let me make sure that I understand what you are saying. In order for it to be a full cousin relationship both people being compared must be related by a most common ancestral couple. So in order for the cousin calculator to be accurate, it must show a couple at the top and not an individual. If two people are related to a common ancestor but not the same couple, then it is a half relationship. In order for it to be a full relationship, they would need to go up another generation to the parents of that common ancestor. Every half relationship can be changed into a full relationship by going back one more generation.


    Comment by Mark Tucker — 27 Sep 2010 @ 10:39 pm

  5. I just wanted to direct you to this blogpost

    It’s just funny because I’m not a genealogist, amateur or otherwise, but I ran into both these posts on the same day.

    Nice blog Mark.

    Comment by Oralia Garcia — 30 Sep 2010 @ 9:42 am

  6. This is a great application. Thanks for posting the video!

    Comment by Find My Ancestors — 8 Oct 2010 @ 7:20 pm

  7. I just bought my android phone – I hope they will make this available for it or my iPhone. I haven’t done much genealogy for the past couple of years but am getting back into it.

    Comment by Barry Hughes — 1 Dec 2010 @ 4:14 pm

  8. Hey Mark…..greetings from your former ProGen buddy…..what is the status on Cousin Finder? I just bought the Windows Phone 7. Thank you. Jeff

    Comment by Jeffrey Vaillant — 9 Aug 2011 @ 6:19 pm

  9. The app is in the marketplace. You can get it at:

    If you like it, please submit a review.

    Comment by Mark Tucker — 11 Aug 2011 @ 8:07 am

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