Data loggers

[Elitniy CalcLover]

Im planning on buying a data logger for christmas - making measurements and collecting data always interested me, so I found a thing id really like - a data logger, at this moment i have 2 options:
einstein tablet+ - found a really good option very cheap, has some included sensors but there is nowhere to buy additional ones, and this is the main problem cause included sensors are pretty basic (microphone, temperature, light, etc)

Vernier Labquest - very expensive for me, ebay doesnt ship them to russia, ~100$ for one, 2 included sensor are very basic, but you can buy additional sensors from the same seller easily - this raises a question, can sensors be interchangeable? What if i connect a vernier sensor to an einstein tablet, will it detect it?

So what do you think, or do you know any other data loggers? My budget is very limited though (I can spend around 65$ only)