As of March 2022, the ranking of cryptocurrency app downloads in Ottawa, Canada is as follows:

1. Coinbase - Coinbase is a popular cryptocurrency exchange platform that allows users to buy, sell, and trade various cryptocurrencies such as Bitcoin, Ethereum, and Litecoin. It is one of the most widely used cryptocurrency apps in Ottawa due to its user-friendly interface and security features.

2. Binance - Binance is another popular cryptocurrency exchange platform that offers a wide range of trading options and features. It is known for its low trading fees and high liquidity, making it a preferred choice among cryptocurrency traders in Ottawa.

3. Kraken - Kraken is a well-established cryptocurrency exchange platform that offers a secure and reliable trading environment for users. It is known for its advanced trading tools and competitive fees, making it a popular choice among experienced cryptocurrency traders in Ottawa.

4. Coinomi - Coinomi is a popular cryptocurrency wallet app that supports a wide range of cryptocurrencies and tokens. It is known for its strong security features and ease of use, making it a preferred choice among cryptocurrency investors in Ottawa.

5. Trust Wallet - Trust Wallet is a secure and decentralized cryptocurrency wallet app that allows users to store a wide range of cryptocurrencies and tokens. It is known for its user-friendly interface and strong security features, making it a popular choice among cryptocurrency enthusiasts in Ottawa.

Overall, the cryptocurrency app market in Ottawa is diverse and competitive, with a wide range of options available to users for buying, selling, and trading cryptocurrencies. Users should carefully research and compare different apps to find the one that best meets their needs and preferences.