This upgrade Fits all Grainfathers currently on the market.

Features 

• Automation without removing the fun of brewing, be as involved and you want to be
• More automation means you can multitask or simply relax while brewing and then be alerted when to return for your next step
• Bluetooth connection to your mobile device so it can be controlled remotely 
• PID algorithm works in conjunction with a triac for more stable heating and so you can control power output
• Programmable step mashing
• Delayed heating - fill your Grainfather with water the night before and wake up to your water at strike temperature ready for brewing straight away
• Change between celsius and fahrenheit easily

App Features 

• Grainkid recipes provided in app
• Import Beer XML files 
• Set your own boil temperature (for different altitudes)
• Change between celsius and fahrenheit easily
• Grainfather calculators