Question: Is there a service that allows me to write my app once and deploy it on multiple blockchain networks?

If you want a service that lets you write your app once and run it on multiple blockchain networks, Unifra is a good option. Unifra's Open API lets developers write once and run apps on Polygon, Ethereum and Optimism, and other blockchain networks, and it offers tools to link to different blockchain networks and adapt to their differences. It also offers AI-powered analytics to monitor app performance and real-time alerts for user activity.

Another good option is Moralis, which offers a collection of Web3 APIs for enterprise-scale programming that provides immediate access to data on multiple blockchain networks and real-time market data. Moralis supports several EVM chains and cuts development time and complexity, so it's good for dapp development, Web3 wallets, market analysis and other programming tasks. Its real-time data streams and high-accuracy blockchain data can also boost the scalability and performance of your app.

For a more decentralized approach, Internet Computer offers full-stack decentralization with its sovereign network. It can interoperate with other blockchain networks and with traditional Web2 resources, so it's good for building decentralized apps. It's designed to be easy for developers to use, supporting several programming languages, and it has a scalable multi-subnet architecture, advanced cryptographic protocols and a user-centric design.

Last, CryptoDo is a no-code platform that lets you create and deploy web3 apps and smart contracts in five minutes. With a modular architecture and AI-powered customization, CryptoDo supports a range of solutions like NFT, DAO and Staking, so it's good for businesses and individuals who want to create verified smart contracts without having to write any code.