(marketscreener.com) SAN FRANCISCO, CA, April 04, 2022 -- via NewMediaWire -- APT Systems, Inc. , a software development and fintech company, is announcing it has launched Spera on the Mainnet in preparation for making the Spera stablecoin available for purchase. "Our team is proud to announce we've moved Spera from the...https://www.marketscreener.com/quote/stock/APT-SYSTEMS-INC-120795102/news/APT-Systems-Announces-Launch-of-its-Spera-Stablecoin-on-Mainnet-39961573/?utm_medium=RSS&utm_content=20220404