There is no need of subscription to use the UbiBot Platform.
Each device comes with the free plan on UbiBot platform that offers 200MB storage and 1GB outbound traffic. The 200MB storage is for lifetime and 1GB of outbound traffic is rotated monthly for each device. For example, if your device takes temperature, humidity and light sensor readings every 10 minutes, the free 200MB storage is enough to store over 2 years amount of data.
You can also pay for larger amount of storage and outbound traffic. Please go to the “Pricing” page to see details.