CoinTracker is a free iPhone application developed by Nino Finance Inc. that helps you track your cryptocurrency portfolio and calculate your cryptocurrency taxes. It supports over 100 exchanges and wallets, and over 2,500 cryptocurrencies.

With CoinTracker, you can easily track your portfolio in one place, view your return on investment, your unified transaction history, wallet balances, and much more. It also calculates your cost basis and capital gains, saving you hours of work with one of its tax plans, or you can download your transaction history for free.

CoinTracker synchronizes balances, transactions, and ERC20 tokens from your local wallets and exchange accounts. It has read-only access to your accounts, ensuring that your funds are safe. You can also visualize how your cryptocurrency moves between wallets and exchanges and see every transaction in one place.

CoinTracker has received great feedback from users who have tried other portfolio tracking apps and find this one to be perfect in every way. It has also been praised for its customer service and for being receptive to feedback.

Overall, CoinTracker is a reliable and secure tool for anyone looking to track their cryptocurrency portfolio and calculate their taxes.