iPhone Screenshots


TimeTree 4 is a public knowledge-base for information on the evolutionary timescale of life. This application allows easy exploration of the thousands of divergence times among organisms in the scientific literature. A tree-based (hierarchical) system is used to identify all published molecular time estimates bearing on the divergence of two chosen organisms, such as species, compute summary statistics, and present the results. Names of two taxa to be compared are entered in the search window and the results are presented on a set of self-explanatory tabs.

TimeTree 4 contains data from 2,274 studies including 50,632 species. We will be adding more data in the future as it comes in from researchers.

TimeTree 4 requires iOS 8.0 or newer.

The TimeTree project is jointly directed by Blair Hedges (Center for Biodiversity, Temple University) and Sudhir Kumar (Institute for Genomics and Evolutionary Medicine, Temple University). This project has been supported, in part, by grants from the National Science Foundation, National Institutes of Health, NASA Astrobiology Institute, and Science Foundation of Arizona.

What's New

Version 4.0

New universal app for iPad and iPhone.
New divergence times from over 2000 studies.
Numerous bug fixes and server updates.

Ratings and Reviews

Crashes instantly


This app used to be great! I used it on an old iPad 2. I just attempted to use it on the iPad Pro 9" and it cannot even open: just crashes instantly. Please fix it so I can use it with teaching my life science classes...

cool app!!


using this app has been helpful.

Way cool science app


I just downloaded the app and played with it for a while. This will be fun when I get into chats with creationists or just want to add to my trivia collection.

Just a note. If you are looking for a date between humans and gorillas or chimpanzees , use homo sapiens rather than human. I couldn't get a result with human/gorilla or human/chimpazee.

Have fun.


Center for Evolutionary Functional Genomics
68.2 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2015 Institute for Genomics and Evolutionary Medicine


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