This is the "Hello World" of quantum computing. It demonstrates entanglement between two qubits. The Limitations of Free Tiers
While "free" is fantastic, there are caveats you should be aware of: free cloud based quantum computing system
The gate is open. The cloud has torn down the walls of the laboratory. You have access to machines that defy classical logic, and they are waiting for your instructions. Whether you choose the drag-and-drop simplicity of IBM’s Composer or the code-heavy depths of Cirq, the most important step is to simply begin. This is the "Hello World" of quantum computing
Based in the Netherlands, is a great European alternative. It offers a web-based platform to run algorithms on both simulators and a small-scale spin-qubit processor. How to Get Started free cloud based quantum computing system