- November: First implementation, simple data types, simple GUI
- February: Implemented selection (the same item gets selected in all trees, changing a tab shows the same item)
- March: Implemented remaining local functionality (Copy Branch as Sibling, Copy Children to Siblings, Remove from this Tree, Delete Item)
- August: Created installable python package
- May: Implemented new field type text
- June: Create deployable packages for Linux and Windows
- June: Made pre-release v0.0 available
- October: Implemented new field type node-path, re-wrote the way nodes move to new parents
- November: Uploaded package to pypi.python.org, TreeTime can now be installed using pip
- October: Re-implemented the parent selection mechanism. The old cascaded menus have been replaced with single drop down lists.
- October: Re-furbished the GUI and removed a couple of bugs. Slighty changed the data file format. Implemented theme selection. Tested pyqtdeploy for deployment instead of pyinstaller. Updated the description.
- November: Released version 2018-10
- January: Implemented new field type "URL"
- June: Fixed problem with protected cells (typing into a cell without data could cause a crash), and fixed file selection dialog (now only offers .trt files).
- July: Implemented text export - single branches or complete trees can now be exported to txt files.
- August: Implemented time counters - nodes can record the time using a special field of type "timer" (experimental). GUI buttons can start and stop the stopwatch function.
- September: Added move-to-top-level option for first level nodes
- October: Added a dark and a light palette for GUI colours, selectable in addition to the theme selection.
- November: Fixed too slow editing in text fields when tree files are big (>1.5 MB).
- January: Released version 2021.01.
- January: Bugfixing (timer crash)
- February: Released version 2021.2.
- March: New functions "Delete node" and "Remove node from tree" now move descendants one level up. "Remove branch" removes the respective branch in all trees, "Delete branch" deletes a branch, all child branches and inter-connections in all trees.
- March: If a file with running timers is saved, those timers will be running when the file is loaded.
- March: Added tooltips for main buttons
- March: Implemented HTML export of branches and complete trees
- March: Added auto-delete for orphans
- March: Released version 2021.3
- April: Added file option
- April: Implemented four-column layout and rainbow colours for html export
- April: Released version 2021.4
- May: Improvement to html and txt export (changed colours, headings have no different sizes)
- May: On export of both html and txt, user can now decide how many tree levels (depth) should be exported.
- May: Released version 2021.5
- July: Fixed broken application logo
- July: Implemented CSV export
- August: Released version 2021.8
- September: Added new export option "Text to Clipboard"
- November: Added new export option "Html (List) to File"
- December: Added two primitive template files (a text-only single tree and dual tree mindmap)
- December: Released version 2021.9
- March: Fixed crash bug on non-export
- March 2022: Improved sorting and grouping in html export, changed to five columns
- June 2022: Added a tutorial file
- June 2022: Added first-use dialog when no file is loaded, instead of the file-open dialog
- June 2022: Released version 2022.1
- Running: Bugfixing
- Running: Extend documentation on readthedocs.io
- Running: Add more examples and more template data files
- Implement search function
- Implement global functions (Linearise Tree, Level-Swap, Merge identical Siblings, Merge Identical Parents/Children, Remove all Orphans, Insert all Orphans as Children)
- Implement tree export to PDF, and/or CSV
- Implement more tree field types (standard deviation, min, max, string concatenation),
- Implement tree field editing with graphical dialog (add, remove, change tree fields)
- Implement data item field editing with graphical dialog (add, remove, change data item fields)
- Implement safe usage by multiple simultaneous users
- Implement a database backend instead of text file storage
- Implement a web server
- A whole lot of other fancy things that will probably never get done