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How to check your heart rate without an Apple Watch
Key takeaways
- You can check your pulse for free with two fingers: count for 30 seconds and multiply by 2.
- Your iPhone camera can measure heart rate from your fingertip in about 30 seconds — no watch needed.
- A chest strap is the most accurate option during exercise; a watch is best for all-day tracking.
- At rest, any of these work. Track trends, not single numbers.
You don't need a smartwatch to know your heart rate. Here are five reliable options, from free to dedicated hardware.
1. Count your pulse by hand
Place your index and middle fingers on the inside of your wrist, below the thumb (radial pulse), or on the side of your neck. Count the beats for 30 seconds and multiply by two. The American Heart Association recommends checking your resting pulse when you're calm — ideally in the morning before getting out of bed.
2. Use your iPhone camera
Every heartbeat sends a small wave of blood into your fingertip, which changes how much light it absorbs. Heart rate apps light your finger with the flash and track that color change through the rear camera. This technique, called photoplethysmography (PPG), is the same optical principle smartwatches use. A 2017 study in the European Journal of Preventive Cardiology found that apps measuring with a fingertip on the camera were more accurate than contactless apps — but individual readings could still be off, so it pays to measure carefully and watch trends.
With Cardivo, you rest a fingertip on the camera and flash, stay still for about 30 seconds, and get your heart rate plus HRV, stress, and energy explained in plain English.
- Sit down and rest your arm on a table.
- Cover both the camera and flash with light pressure — don't press hard.
- Warm cold hands first; stay still and quiet until the reading finishes.
3. Chest strap heart rate monitor
Chest straps read the heart's electrical signal and are the gold standard for consumer heart rate during workouts. They pair with your iPhone over Bluetooth. Downside: extra hardware you have to wear.
4. Fingertip pulse oximeter
These clip-on devices show pulse and oxygen saturation (SpO₂). They're inexpensive and handy at home, but accuracy can be affected by cold fingers, nail polish, and, according to the FDA, darker skin pigmentation.
5. Home blood pressure cuff
Most automatic cuffs display your pulse along with blood pressure. If you already check your blood pressure, you're already recording your heart rate.
Which option should you choose?
| Method | Cost | Best for | Limitations |
|---|---|---|---|
| Counting by hand | Free | Quick resting check | No history, no HRV, easy to miscount |
| iPhone camera app | Free to download | Resting heart rate, HRV, trends, no extra device | Must be still; not for workouts |
| Chest strap | Extra device | Exercise accuracy | Must wear it; no resting journal |
| Smartwatch | Extra device | All-day and workout tracking | Cost, charging, wrist fit |
| Pulse oximeter / BP cuff | Extra device | Pulse alongside SpO₂ or blood pressure | No HRV; separate logs |
Know your numbers
A normal adult resting heart rate is about 60–100 bpm. A resting pulse that's consistently above 100 or below 60 (when you're not an athlete) — especially with dizziness, fainting, or shortness of breath — is worth discussing with a doctor. Call 911 for chest pain or other emergency symptoms.
This guide is general wellness education based on the public sources below. It is not medical advice, diagnosis, or treatment. Cardivo is not a medical device. If you think you are having a medical emergency, call 911.
Frequently asked questions
Can my iPhone measure heart rate without an Apple Watch?
Yes. Heart rate apps like Cardivo use the iPhone's rear camera and flash to read your pulse from a fingertip in about 30 seconds.
How accurate are iPhone camera heart rate apps?
Research has found that apps using a fingertip on the camera are more accurate than contactless apps, though single readings can still deviate. Sit still, cover the camera and flash lightly, keep fingers warm, and compare readings over time.
How do I check my pulse manually?
Put two fingers on the inside of your wrist below the thumb, count beats for 30 seconds, and multiply by two.
Does the iPhone have a built-in heart rate monitor?
The iPhone has no dedicated heart rate sensor, but its camera and flash can measure pulse with an app. Apple Health can also show heart rate from a paired watch or other devices.
Sources
- American Heart Association — All about heart rate (pulse)
- Coppetti et al. (2017), Accuracy of smartphone apps for heart rate measurement, European Journal of Preventive Cardiology
- US FDA — Pulse oximeters