As the title says why are they so expensive as all they are are a hydrometer that sends upto date readings via a App/mobile phone. Surely this technology is not cutting edge compared to some of the things we can buy nowadays it seems to be that they know that quite a large amount brewers are hobbyists and as with most hobbies they have a larger disposable income. Do people think the same as me and yes I know they do a good job for brewers but I can not justify £130 plus for a hydrometer as really that is all it is