Starting in February 2025, UMbase releases numbers are aligned to code build numbers. In programming terms, this is the number of times commits were applied to the source control repository.

Releases

The current stable release of UMbase is 1098 (Catnip).

UMbase is developed using the principles of rapid application development (RAD), so there are frequent releases/updates – in fact, there is a new build of UMbase, on average, about every other day^[1] - 1098 client-side builds, 187 admin builds, for a total of 1285. There have been 374 production releases of UMbase, with an average of roughly 5 days between releases^[2].

Why Codenames?

Simply put, because they're fun. Every release has a codename and codenames generally follow a theme for several releases. Codenames are not political statements. Here are some of the subjects after which UMbase releases have been named.

Versions	Number of Releases	Code name theme
1090 – 1098	9	Spices
9.0 – 9.93	94	World Capitols
8.0 – 8.47	48	African Countries
7.0 – 7.117	118	Elements of the Periodic Table
6.0 – 6.5	6	Municipalities of Greenland
5.0 – 5.7	8	Canadian Cities (Reprise)
4.0 – 4.5	6	Iron Chef Judges
3.24 – 3.48	25	Fish from A-Z
3.0 – 3.23	24	Fish, Alphabetically
2.0 – 2.6	7	Asian Capitols
1.25 – 1.27	3	Candian Capitols
1.10 – 1.24	15	European Capitols
0.9 – 1.9	11	Iron Chefs