TinyCSINet

The model's test ranking performance is presented as adequate for longitudinal HeartSpan trend detection. TinyCSINet showed similar validation and test performance with a small generalisation gap. TinyCSINet is a lightweight CNN-Transformer designed for mobile PPG inference. TinyCSINet is trained through a cross-modal chain using ECG-derived CSI pseudo-labels for smartphone PPG windows. TinyCSINet evidence is proof-of-concept rather than sufficient for individual-level clinical deployment.