These apps weren't just games. Functional included:

: Adding a feature that lets the app read/write to the phone's

Move the file to your SD card and open it directly from the phone’s file manager.

Since VXP apps are local and memory-constrained, a modern feature could bridge the gap between "dumbphone" simplicity and modern convenience. : MRE Cloud-Save Bridge

: Various simple utilities, such as "Eight Water" (a hydration tracker), were also developed in this format. How to Install and Run VXP Files