Currency converter offline

Currency converter app.<br><br>+ Offline mode. It works without the Internet.<br>+ 150 world currencies.<br>+ Small application size.<br>+ Calculator (+ - × ÷).<br>+ Blockchain Cryptocurrencies (Bitcoin, Ethereum, Litecoin).<br>+ The exact exchange rate.<br>+ Smart currency search.<br>+ Copy and paste numbers.<br>+ Dark theme.<br>+ Written in Kotlin.