ServiceSage Auto is free for up to 3 vehicles and a flat $39/month for every vehicle and machine - not priced per vehicle. AUTOsist's All-in Maintenance plan is priced per vehicle with a 5-vehicle minimum, so cost grows linearly as vehicles are added; its free tier is limited, with full maintenance features behind a paid plan. AUTOsist offers native iOS/Android apps; ServiceSage Auto is a mobile-friendly web app. Both include OEM service schedules, cost tracking, and mileage/time-based reminders.