You can use https://bitbo.io/ to track the Bitcoin ETF traded on the TSX (Canadian exchange). Source: over 1 year ago

Back to BTC ETFs for a second: So the main reason I wanted a bitbo.io replacement was bc I could see the discounts. After large drops in BTC, panic selling led to these stocks price falling to even lower than the corresponding amount of BTC. This discount would vary amongst the ETFs (I dont know why) So my strategy was to buy based on whichever had the biggest discount (in the hours following the drops in bitcoin... Source: about 2 years ago

Taking info from this site: https://bitbo.io/. Source: over 2 years ago

It still doesn't completely negate any discount, but just compare QBTC (-4.65% Discount) vs. GBTC (-20.75% Discount) for the effect that an escape hatch has. That site is run by a BTC maxi, so doesn't have Ethereum funds listed, but the discount/premium behaviour is similar. Source: over 2 years ago

In all honesty though /u/Not_Selling_Eth, I'd totally have that site as a regular visit. Back in my grandpa days, I'd visit https://bitbo.io/ quite a bit to get a snapshot of the market. Source: over 2 years ago

If you store all your coins in a single wallet, such as exodus, then that's the easiest way to keep track. If your coins are split across different wallets and exchanges though, I use this on windows and it seems to be available on mac as well - you just manually enter your hold and it updates prices every few seconds :). Source: about 3 years ago