Site: catalyx.io
Mobile app: -
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Chinese platform FCoin announced in February, 2020 that the exchange will stop its operation. A founder of the exchange explained this decision by internal errors.  FCoin still owes its users the amount from 7.000 to 13.000 BTC. 
AENX, also known as AEN Exchange, is a digital asset trading platform developed by Aenco Limited.
Established in late 2016, C2CX platform serves as the volume aggregator.  This Hong-Kong based exchange provides more than 50 pairs and over 27 currencies to trade with. The mobile app was developed for both Android and iOS platforms.