42 Providing temporary use of non-downloadable web-based decentralized applications (DApps) for gaming and for the exchange and creation of a virtual currency and Digital Art Non-Fungible Tokens (NFT's); Providing user authentication services using blockchain-based software technology for cryptocurrency transactions; application service provider featuring application programming interface (API) software for recording and organizing exercise and fitness data, performance, and goals, and communicating data; software as a service (SAAS) services, featuring software for connecting to fitness trackers and wearable electronic devices for the communication, processing, and analyzing of data; software as a service (SAAS) services, namely, hosting software for use by others for downloading digital media, namely, digital collectibles, digital tokens, multimedia files authenticated by non-fungible tokens (NFTs), cryptocurrencies, and digital art, for viewing crypto-collectibles being digital media, multimedia files authenticated by non-fungible tokens (NFTs) and other application tokens, for electronically trading, storing, sending, receiving, accepting and transmitting crypto-collectibles being digital media, multimedia files authenticated by non-fungible tokens (NFTs) other application tokens, for electronically trading, storing, sending, receiving, accepting and transmitting digital currency, and managing digital currency payment and exchange transactions, processing transactions related to crypto-collectibles being digital media, multimedia files authenticated by non-fungible tokens (NFTs) and other application tokens, and for downloading authentication software for communications with computers and computer networks; platforms as a service (PAAS) featuring computer software platforms for downloading digital media, namely, digital collectibles, digital tokens, multimedia files authenticated by non-fungible tokens (NFTs), cryptocurrencies, and digital art, viewing crypto-collectibles being digital media, and multimedia files authenticated by non-fungible tokens (NFTs) and other application tokens, for electronically trading, storing, sending, receiving, accepting and transmitting being digital media, multimedia files authenticated by non-fungible tokens (NFTs) and other application tokens, for electronically trading, storing, sending, receiving, accepting and transmitting digital currency, and managing digital currency payment and exchange transactions, for processing transactions related to crypto-collectibles being digital media, multimedia files authenticated by non-fungible tokens (NFTs) and other application tokens, and for downloading authentication software for communications with computers and computer networks; Providing temporary use of on-line, non-downloadable games that accept virtual game currency for use in virtual environments created for entertainment purposes sold as a feature of non-downloadable game software