Gadgets I bought in 2018: Which one is worth buying?

This blog post is the list of electronic gadgets I bought in 2018. I will give brief pros and cons in my opinion (you can consider it as a quick review), and whether it is worth buying from 5 (worth it) to 0 (not worth it). Note that everything here is from the consumer’s point of view. Every gadget is bought with my own saving.