Also, we have the idea of a tool for comparing currencies on exchanges. We want to make a convenient place where all the tools you need are collected in one place. And in the end, we plan to make a convenient and practical toolbox out of just a news aggregator.
It's already existing and being provided by companies such as Blockfolio, Tab Trader. Although you may add features thus you may differ from them, you'll end up being one of their competitors which is difficult for a starting company such as your company.
What tools do you use to interact with cryptocurrency? What functions do you need? What do you advise us to strive for?
Most likely features for trading. There are a lot of features that can be added in trading. If you'll take a look at stock trading tools, there are a lot of elements from them which you can apply in crypto trading.