Checking the RingPlus site, the "free" plans seem to be $0/month for service + $X per unit of usage. One of their plans, for example, is $9 for (250 minutes voi

Checking the RingPlus site, the "free" plans seem to be $0/month for service + $X per unit of usage. One of their plans, for example, is $9 for (250 minutes voice + 250MB data + 250 sms + 250 mms). There is also an overage charge, but I don't know what that means. They are also ad supported, apparently, playing an audio ad before each outbound voice call you place. This seems reasonable for some people. By contrast, for a tracfone, in addition to voice-minutes/data/etc. you also have "service days" that must paid for, even if you don't use the phone at all.