As of now, the ranking of cryptocurrency app downloads in the city of Kabul, Afghanistan is as follows:

1. Coinbase: Coinbase is one of the most popular cryptocurrency apps worldwide, allowing users to buy, sell, and store various cryptocurrencies such as Bitcoin, Ethereum, and Litecoin. Its user-friendly interface and secure platform make it a top choice for many investors in Kabul.

2. Binance: Binance is another widely used cryptocurrency app that offers a range of trading options and features for experienced investors. With its advanced charts and tools, Binance is preferred by traders looking to execute complex trading strategies in Kabul.

3. BitPay: BitPay is a popular cryptocurrency app that focuses on facilitating transactions and payments using cryptocurrencies. In Kabul, many businesses and individuals use BitPay to accept Bitcoin and other digital currencies as payment for goods and services.

4. Blockchain Wallet: The Blockchain Wallet app is a secure and easy-to-use platform for storing, sending, and receiving cryptocurrencies. Its popularity in Kabul is due to its strong security features and support for a wide range of digital assets.

5. Kraken: Kraken is a well-known cryptocurrency exchange platform that offers a variety of trading pairs and advanced trading tools. In Kabul, many investors prefer Kraken for its low fees and high liquidity, making it a top choice for trading digital assets.

6. Trust Wallet: Trust Wallet is a decentralized cryptocurrency wallet app that allows users to securely store and manage their digital assets. In Kabul, Trust Wallet is popular among users who value privacy and security in managing their cryptocurrencies.

7. Coinomi: Coinomi is a multi-asset cryptocurrency wallet app that supports a wide range of digital currencies. Its user-friendly interface and strong security features make it a popular choice among cryptocurrency enthusiasts in Kabul.

Overall, the cryptocurrency app market in Kabul is thriving, with a wide range of options available to cater to the diverse needs of investors and traders in the city. The above ranking reflects the current preferences of users in Kabul based on popularity and functionality.