FLEXcyte 96 transforms traditionally limited cardiac contractility approaches of the Langendorff Heart into a cutting-edge modern high-throughput technique. Unique flexible substrates of the FLEXcyte recording plates mimic in vivo – like environments. Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC- CMs) grown in such physiological conditions display positive inotropic responses without additional stimulation.