How do you track Bitcoin cost basis across exchanges and cold wallets?

Once you start buying Bitcoin on multiple exchanges and moving coins to cold storage, tracking everything gets complicated pretty quickly.

Between:

• transfers between wallets
• network fees
• UTXO consolidation
• keeping cost basis accurate
• making sure everything lines up for tax reporting

my spreadsheet started getting pretty messy.

I ended up building a small browser-only tracker for myself just to keep things organized across wallets. It handles basic things like logging buys and transfers, tracking cost basis, and exporting transactions for tax software.

But I’m curious what other people here are doing.

Are most people still using spreadsheets for this, or are there tools/workflows that work well once you start managing multiple wallets?