This historical link identifies Azumio’s Instant Heart Rate, App Store ID 395042892. The connection is documented in the developer’s own Sleep Time support article, which links to this exact Apple identifier. That is more useful evidence than matching an app icon or a similar name: it establishes the product the old link described.
A phone camera used for a different purpose
Azumio presented Instant Heart Rate as a way to obtain a pulse reading with a smartphone camera. Its 2015 instructions explained the importance of lens placement and keeping still. Those instructions describe the developer’s intended use; they are not an independent assessment of accuracy, and this article does not claim to have tested the app against clinical equipment.
The distinctive idea was to turn familiar hardware into a short measurement interaction. Instead of taking a photograph to keep, a person used the camera as an input to a record. That shift helps explain why early health and fitness apps attracted interest beyond people who already owned dedicated wearable devices.
How it fitted into Azumio’s other apps
The developer’s 2019 Sleep Time documentation described opening Instant Heart Rate from a morning heart-rate entry. A separate Argus support page explained that using the same account across Azumio apps enabled data synchronization. These are historical integration details, not a promise that every connection continues to work on a present-day device.
For someone reviewing old records, the useful distinction is between the app, the account and exported data. An app purchase identifies software; it does not by itself tell you where years of measurements were stored. Before replacing a phone or deleting an old installation, check whether the records you want are visible elsewhere and whether you can save a readable copy.
Revisiting the original purchase
Our September 2026 US and UK Apple lookups did not return this exact identifier. That limited check cannot establish availability in every region or a previous purchaser’s account. Start with Azumio’s official support when investigating an old purchase, and compare the exact edition before assuming a newer free app or subscription preserves the same features.
A historic product page also cannot establish that a reading is suitable for a medical decision. Treat this article as an account of the app and its workflow, rather than medical guidance or an endorsement of its measurement claims.