Online Tanker System (OTS) is a free iPhone application developed by MILLENNIUM SYSTEMS CONSULTANTS PRIVATE LIMITED. It falls under the Utilities & Tools category and aims to address the increasing dependency on water tanker services due to the scarcity of water supply through pipelines.

OTS provides a technology platform that connects water tanker consumers and hydrant staff. The smartphone app allows consumers to register a request for a water tanker. The app utilizes Google Maps to calculate the estimated distance for transportation charges, ensuring transparency in pricing.

Once the request is made, OTS forwards it to the concerned hydrant, and the consumer is informed about their request through SMS. The SMS includes details such as the tanker charges, contact information of the tanker's driver, and the closure of the request.

With OTS, consumers can easily request water tankers, track their requests, and have access to important information, making it a convenient and efficient solution for water tanker management.