Power Outage Sensor for non-SimpliSafe devices and appliances

I think a sensor that would plug into an outlet and then you plug a device (iron, freezer, fridge, light, etc.) into it could be an easy way to detect if a device had failed or if the power to the device was no longer available.  I suppose it could detect that the device was drawing power, indicating the device was on.  If the device no longer drew power than it is off (for an iron this would be a good thing to know), it had failed (like a freezer that should be drawing power) or the outlet had problems, such as a tripped GFI.

Ideally the sensor could monitor and report power usage through it, maybe instantaneous and also averaged over time such as a week or a month.  We try to keep our energy use low to save money and this could help us identify where we could best reduce.

Even if this is a silly idea it might prompt other customers and/or SimpliSafe engineers for a new kind of sensor that would provide more useful info about our system.