ahh. generally whatever is handy. there's a blockclock micro in the office, and I tend to keep a cryptowat.ch browser tab open with the current btcusd chart on it, set to weekly candles. on the phone, strike app has the usd price close at hand.

but I admit to not worrying about exact conversion enough to think about it much. I think we're in the neighborhood of 3800 moscow time.

https://f-droid.org/packages/com.minimalisticapps.priceconverter/