TimeTree

Name: TimeTree
Rating: 3.5 (12 reviews)
Author: Arizona and Penn State Universities

By: Arizona and Penn State Universities

Education

Features & Capabilities

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.

User Growth & Download Statistics

App

By:

Arizona and Penn State Universities

Rating:

3.50

(12)

Version:

4.0 Last updated: 2015-08-03

Version code:

837119270

Creation date:

2010-06-04

Compatible devices:

Size:

65.80MB

URLs:

Website

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-12

Compare stats and ranking:

Ranking

# 397,275 ▼ 2,242

For Developers

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Contact the developer

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Developed by:

Arizona and Penn State Universities

Apple Apps Store

https://apps.apple.com/us/app/timetree/id372842500

Website:

http://www.timetree.org

User Reviews

TimeTree is a free, educational app that helps users explore evolutionary relationships and divergence times, with handy links to NCBI and a strong potential for lectures and classroom use. Users praise its concept, breadth of content, and the engaging way it presents LCAs. However, repeated reports of crashes, freezes, and unreliable search cripple the experience. Compatibility and UI issues on newer devices, plus a lack of guidance or a manual, also hinder adoption, especially for non-experts. Stabilizing performance, fixing search, and improving onboarding would unlock the app's educational value.

Pros

Free educational tool for taxonomic relationships and last-common-ancestor (LCA) data.
Useful for lectures and learning; provides divergence times as quick references.
Engaging to explore evolution; includes external links (NCBI) for deeper research.

Cons

Frequent crashes and instability; the app won’t open or freezes on various devices.
Search functionality is unreliable or broken (malformed results, cannot search, errors).
Compatibility/UX issues on newer devices and older hardware; layout not well optimized; limited onboarding.

Recent reviews

This app no longer works. Please update.

by Da*****, 2026-04-23

Can’t search anything

by fu*****, 2025-10-24

I appreciate this evidence-based app for helping me to understand the time of divergence of two taxa. For instance, I just found out today that anteaters and aardvarks likely split evolutionarily about 100 million years ago! Not everyone wonders about this, but for those who do, this app is a great reference.