Connect a heart rate monitor to your iPhone to track your pulse and blood oxygen levels in real-time. Unlock advanced features like blood pressure and respiration rate calculations with an optional subscription.
CARDIO by CardioQVARK, OOO

231+ iOS apps curated and reviewed
Finding the right ooo lcard apps can be overwhelming with so many options. We've analyzed 231+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | — | No | No | May 2026 | ||
| 2 | Free | 1.0★ (2) | No | Yes | May 2026 | ||
| 3 | Free | — | No | No | May 2026 | ||
| 4 | Free | 4.8★ (3.4K) | No | Yes | Sep 2026 | ||
| 5 | Free | 4.8★ (31K) | Yes | Yes | Sep 2026 | ||
| 6 | Free | 4.8★ (124K) | Yes | Yes | Sep 2026 | ||
| 7 | Free | 4.5★ (7.5K) | No | Yes | Sep 2026 | ||
| 8 | Free | 4.8★ (15K) | Yes | Yes | Sep 2026 |


Connect a heart rate monitor to your iPhone to track your pulse and blood oxygen levels in real-time. Unlock advanced features like blood pressure and respiration rate calculations with an optional subscription.

Monitor your heart health with this app, connecting to a compatible device to record ECG and photoplethysmogram readings. Review analyses, share data with your doctor, and store results in your health app.