PulseCheckGuide
How to check your heart rate without an Apple Watch
You do not need to buy anything to know your pulse. You need two fingers and a clock, or the phone already in your pocket. Here is what each option really gives you.
PulseCheck turns the rear camera into the sensor. Free, and rated 5.0 out of 5 from 1 rating on the App Store.
This is a fitness and wellness guide. PulseCheck is not a medical device, it does not diagnose anything, and nothing here replaces a visit to a doctor.
Option one: your own fingers
This is the method every nurse learns and it costs nothing. Turn one palm upwards. Place the index and middle finger of your other hand on the inside of the wrist, on the thumb side, just below the crease. Press gently until you feel a tap. Do not use your thumb, because your thumb has a pulse of its own and you will end up counting it.
Then count the taps for 30 seconds and double the result. Counting for a full minute is more exact; counting for 15 seconds and multiplying by four is faster and rougher.
What is good about it: nothing can break, nothing needs charging, and you learn what your own pulse feels like. What is annoying about it: you have to concentrate on counting and watching a clock at the same time, you cannot do it while catching your breath after a run, and nothing is recorded, so a number you took last Tuesday is already gone.
Option two: the phone you already have
The rear camera and flash of an iPhone work as a pulse sensor. Your fingertip covers both, the flash lights the tissue from one side, and the camera watches the light that comes back get slightly brighter and dimmer with every beat. The counting is done for you, and unlike a manual count it can be saved, tagged and compared later.
The trade is honest and worth knowing: a camera reading is a spot check taken while you sit still. It cannot follow you around, it cannot run during a workout, and it depends on light, on warm hands and on you not moving. The full technique, and what each failure means, is on the camera guide.
Option three: a strap or a monitor
A chest strap reads the electrical signal of the heart rather than light through skin, which is why athletes still use them for interval work when a wrist device drifts. An arm band or a fingertip clip sits in between. All of them are extra hardware to buy, wear and charge.
If you are training seriously with heart rate zones, this is the honest recommendation, and no camera app is a substitute for it.
Side by side
| Method | Extra hardware | One reading | Best at | Falls down at |
|---|---|---|---|---|
| Fingers and a clock | None | 30 to 60 seconds | Always available, never fails | Nothing is recorded, hard while breathless |
| iPhone camera app | None | 15 to 25 seconds | Spot checks that get saved and compared | Needs stillness and warm hands, no continuous tracking |
| Chest strap | Strap plus an app | Continuous | Interval training and zones | Cost, wearing it, charging it |
| Smartwatch | The watch | Continuous | All-day and overnight numbers you never take yourself | Cost, and one more thing to charge |
What you genuinely give up without a wearable
It would be dishonest to pretend a phone replaces a watch. Without something on your body you do not get a resting rate measured while you sleep, you do not get a live number during a workout, you do not get high or low alerts, and you do not get a figure for every hour of the day that you never had to think about.
What you do get, for nothing, is a number whenever you decide you want one. For most people who check their pulse a few times a week, that has always been the whole requirement.
Where PulseCheck fits
- No hardware and no account. The rear camera and flash are the sensor, and there is no sign-up in front of the app.
- It writes the number down. Every saved reading keeps its date, its signal label and a tag you choose, so a month later there is something to look at.
- It can hand the number to Apple Health. The switch is off by default, and PulseCheck only writes, never reads.
- It never grades you. No zones, no red, no verdicts, no warnings. Just the number you took and how clean the recording was.
- It is free. No subscription, no in-app purchase. Ads pay for it.
Requires iOS 26 or later.