Software: Qmax Mst-999

Q: Is the QMAX MST-999 software free? A: Yes, both the Windows utility and the mobile app are completely free from official sources.

Q: Can I update the software without updating firmware? A: Yes. The software application itself (the GUI) can be updated independently of the device’s firmware. Always keep the PC tool updated for bug fixes.

Q: My MST-999 works fine. Do I really need the software? A: You don’t need it for basic jump-starting. However, if you want to maximize battery lifespan and avoid being stranded with a dead jump starter, quarterly diagnostic checks via the software are highly recommended.

Q: Does the software work on macOS or Linux? A: Officially, no. The legacy MST-999 software is Windows-only. However, some users have reported success using WineBottler or running a Windows virtual machine. The mobile app (Bluetooth version) works on iOS and Android. qmax mst-999 software

Q: What is the latest firmware version for MST-999? A: As of this writing, the latest stable firmware is v4.1.2 (released March 2025). It improves cold-cranking performance below -20°C and fixes a rare bug where the USB output would not wake from standby.

The internal lithium-ion battery degrades over time and with temperature exposure. The software provides a granular readout of:

The MST-999 requires firmware updates to support new satellites, fix bugs, or update the satellite frequency list (TP list). Q: Is the QMAX MST-999 software free

Prerequisites: A USB flash drive (FAT32 format recommended).

Do not use third-party download sites. Always get the software from the official QMAX support portal or the authorized distributor’s website.

Warning: Generic “USB to RS232” drivers will not work. The MST-999 requires proprietary CH340 or CP210x drivers, which are usually bundled with the official software. Warning: Generic “USB to RS232” drivers will not work

QMAX has hinted at a forthcoming “MST-999 Pro Toolkit” with advanced features for auto mechanics:

The MST-999 has gone through several iterations. Look at the bottom panel of your device.