Rapids is described as 'The Rapids ( $RPD ) cryptocurrency is a contemporary solution for social payments. The Rapids project features rapid payments across social media through a secure network driven by cryptography and community' and is an app in the Social & Communications category. There are more than 50 alternatives to Rapids for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Android. The best alternative is Bitcoin, which is both free and Open Source. Other great apps like Rapids are Monero (Free, Open Source), Ethereum (Free, Open Source), Litecoin (Free, Open Source) and NameCoin (Free, Open Source).
Bitcoin is a peer-to-peer digital currency. Peer-to-peer (P2P) means that there is no central authority to issue new money or keep track of transactions. Instead, these tasks are managed collectively by the nodes of the network.
Monero is a digital currency that is secure, private, and untraceable. It is open-source and freely available to all. With Monero, you are your own bank. Only you control and are responsible for your funds, and your accounts and transactions are kept private from prying eyes.