VoxAlti uses Wi-Fi to carry out updates. The FDS Altis app (available on iOS or Android) needs to be used first to set the Wi-Fi network name and password on the altimeter. After settings those, use the .bin file at the bottom of this page and follow the instructions in the instructional video found here:


Firmware Version 1.8 (March 23, 2026)
Fixed glitch where buttons would temporarily not respond after detecting ascent; battery readings improved.
VoxAlti_Firmware_1_8.bin