Most TMS systems are under $100/month for 5 trucks. While I appreciate them going full F(l)OSS, this was likely because the company owner isn't very good at computers and was trying to run his business on WhatsApp instead of one of the hundreds of professional options.
Although from a purely software perspective this might be a good thing, from a logistics perspective would this scale to temp control, shock detection, cross-border usage, is it secure, is it prone to fraud, is it safe to use while driving, does it scale to 10, 100, 1000 trucks...?