Phemex is an efficient exchange for crypto futures trading.

Phemex is a leading cryptocurrency exchange specializing in spot and derivatives trading. The exchange supports trading of more than 140 USDT-margin trading pairs with leverage up to 100x that support hedging mode, as well as more than 300 popular pairs for spot trading. Users from all over the world can buy and sell cryptocurrency on a convenient and secure platform.
Phemex has released a transparent proof of reserves based on the Merkle tree, so that any user can verify that the exchange provides 100% safety of funds on the platform. Phemex is the first exchange to confirm its solvency by publishing a proof of reserves based on an automated algorithm.
Phemex is considered to be one of the best and most reliable crypto exchanges.

The main one of the features:

Buying bitcoin and cryptocurrency via credit and debit cards, bank transfer, P2P or other payment methods.
2. Trading derivatives (perpetual contract) with leverage up to 100x and settlement in USDT, USD, BTC or ETH.
3. Hedging mode is supported for all perpetual contracts with USDT margin.
4. Passive income in cryptocurrency. Earn Bitcoins, USDT or other cryptocurrencies with interest rate up to 10% p.a..
5. Track your crypto portfolio with easy-to-use, customizable charts.

https://play.google.com/store/apps/details?id=com.phemex.app&hl=ru