No, every EKG gets an automatic and instant algorithmic result from our Kardia Instant Analysis. It can give you results like 'Possible AF' and just as important, "Normal".
A subscription is not needed to take EKG readings and get Kardia Instant analysis results.
We do offer an optional service to additionally have your EKG sent to our Clinician Review service, where you can have your EKG read by a real life human Clinician. Clinicians can identify many more arrhythmias that Alivecor is cleared to give. (Offerings of review types vary country to country.
For more information on KardiaCare our subscription program that adds valuable features to the Kardia app, you can visit the following page https://www.alivecor.com/kardiacare