PhyloParallelograms App

PhyloParallelograms App compares several rooted phylogenetic trees on the same taxa. The trees are drawn in parallel in one coordinate space as a phylogenetic parallelogram, which highlights the evolutionary structure that the trees share and makes conflicting signals immediately visible. Trees are read in Newick or Nexus format, can be rerooted and filtered, and the resulting figure can be exported as an image or the consensus network as Newick.

Paper: Daniel H. Huson, Banu Cetinkaya and Louxin Zhang. Phylogenetic parallelograms for visual comparison of discordant trees. Manuscript under review. doi:10.64898/2026.09.18.752558

Desktop program: github.com/husonlab/phyloparallelograms (GPL 3).

Beta testing: join through TestFlight at testflight.apple.com/join/MugknuQW, or scan the code below with your iPhone or iPad. The App Store release follows.

Working with files

Documents are kept in the app’s own folder on the device. The files tab of the app lists them, and the same folder is visible in the Files app under On My iPhone (or On My iPad), where files can be copied, renamed or moved to iCloud Drive. To bring a file into the app, share it from another app, from Mail or from Files and choose the app, or copy its text and use Import > Paste into new file in the files tab. To get data out, use Export in the files tab or the export items in the document itself: they open the system share sheet, from which files and images can be saved, sent or copied.

Support

Questions and bug reports: see the support page. Privacy: the app does not collect any data, see the privacy policy. The third-party software included in the app and its licenses are listed on the licenses page and in the app’s About pane in the files tab.

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