Meanwhile, some app makers have said that the service has been slow to get started because the TLC's rules are cumbersome, especially a section intended to mollify concerns from vendors who provide the meter and credit-card systems to the 13, 000-strong fleet.

WSJ: Cab-Hail Apps Are the Target of a Lawsuit

The structure of the charges can vary depending on payment method (by direct debit, pre-payment meter, or credit transfer such as cheque), on whether it is an internet-only tariff, which part of the country the customer lives in, if the deal involves a fixed price, when the deal was launched, how long it lasts, and so on.

BBC: Ed Davey announces 'four core tariff' plan

The industry watchdog said no major supplier had equalised prepayment meter charges with standard credit for both gas and electricity.

BBC: A pensioner by a heater

The floatable bags operate in extreme temperatures of -22F to 140F and protect against water submersion for 30 minutes at a depth of 1 meter, also designed with room to accommodate a few small items such as credit cards, bandages, etc.

ENGADGET: SpareOnePlus adds location tracking, audio alerts, keeps the 15-year life on a single AA battery eyes-on