CARFAX Car Care is free with no vehicle limit on iOS and Android, and its recall alerts and service reminders draw on CARFAX's US vehicle-history data - for a US owner who mainly wants free recall alerts and basic reminders, it covers that well. Three limits show up once more is needed: its history and recall data is built on US and Canadian records, so it is not built for vehicles or owners outside that footprint; it has no equipment or hour-based tracking for things like a generator or mower; and its reminder categories are generic (oil, tires, filters, inspections) rather than a decoded factory schedule by year and trim, with no confirmed expense or tax export.
Stay with CARFAX Car Care if you own one US-titled car and are satisfied with generic reminders. Switch, or run both, when you want the exact factory-specified interval for your vehicle, need equipment tracking alongside vehicles, or want a maintenance expense report for taxes or resale - though CARFAX Car Care's recall tracking is worth keeping around either way, since the alternative does not track recalls.