Monitoring tools are for people with too big capital and too diversifying portfolio. If you have a portfolio with only a few coins inside, you can simply make your spreadsheet to monitor it.
Coingecko has Portfolio tracker
Coinmarketcap has its portfolio tracker too.
On forum, RickDeckard has Portfolio Performance [Open Source] - Keep track of your Crypto Portfolio!
If you share the secret of how to empty Binance accounts with a read-only API key, the guys from the Nobel Committee should definitely know about it.
Regarding the second question. Both CoinMarketCap and CoinGechko are great spot account services. But not for futures.
Our online service is mainly designed for futures traders. Although we will also connect the spot to monitoring soon ... rather, even as a free part of the service.