The IoT Guru provides cloud services and mobile application for developers and users of IoT devices; also offers free and paid as you go tier, mostly based on the data retention and number of messages. Development of IoT devices is very hard, you need various skills to achieve the goals of your IoT project: you will be the hardware designer, the embedded programmer, the network engineer, the backend developer and the UX guy too. You have to know everything from the little hardware to the cloud.