In Hiroshima, Japan, the ranking of cryptocurrency app downloads can vary depending on the specific time frame and source of the data. However, some of the most popular cryptocurrency apps in the region include:

1. Binance: Binance is one of the largest cryptocurrency exchanges in the world, offering a wide range of trading pairs and services. Its user-friendly interface and competitive fees make it a popular choice among both beginners and experienced traders in Hiroshima.

2. Coinbase: Coinbase is another popular cryptocurrency exchange that is known for its ease of use and security features. It allows users to buy, sell, and store a variety of cryptocurrencies, making it a top choice for those looking to get started in the crypto market.

3. Bitflyer: Bitflyer is a Japanese cryptocurrency exchange that is widely used in Hiroshima and other parts of the country. It offers a variety of trading pairs and services, including margin trading and futures contracts, making it a preferred choice for more advanced traders.

4. Coincheck: Coincheck is a Tokyo-based cryptocurrency exchange that offers a variety of services, including buying, selling, and storing cryptocurrencies. It has gained popularity in Hiroshima for its user-friendly interface and strong security measures.

5. Kraken: Kraken is a US-based cryptocurrency exchange that is popular among traders in Hiroshima due to its low fees and wide range of trading pairs. It offers advanced trading features and a high level of security, making it a top choice for experienced traders in the region.

Overall, the ranking of cryptocurrency app downloads in Hiroshima may vary, but these are some of the most popular options among users in the region. It is important to conduct thorough research and due diligence before choosing a cryptocurrency app to ensure that it meets your trading needs and preferences.