Respi-Rate

General-purpose measurement tool

Measure breathing frequency.
Manually.

Observe breathing, tap the Lungs button at the start of each inspiration, and Respi-Rate calculates breaths per minute from the timing of those manually recorded events.

Download on theApp Store Try Rhythm Lab

For iPhone and iPad · Core breathing-frequency measurement remains free

Respi-Rate app screen showing a breathing frequency of 19 breaths per minute, Regularity, experimental I:E timing and the Lungs button

Actual Respi-Rate interface

Global use since 2020

Measured in practice.
Across the world.

Since 2020, users have recorded more than 1.5 million breathing-frequency measurements with Respi-Rate across more than 200 countries and territories.

1.5M+breathing-frequency measurements
66K+new users recorded
200+countries & territories represented

Worldwide reach

Top 10 countries

Ranked by active users

  1. 01United States18,623
  2. 02United Kingdom12,708
  3. 03Australia4,417
  4. 04India3,275
  5. 05Germany2,489
  6. 06Czechia2,419
  7. 07Philippines2,211
  8. 08Canada1,619
  9. 09France1,502
  10. 10Brazil1,296
View the remaining 203 countries and territories

Loading country list…

Source: Google Analytics · 13 August 2020–9 September 2026 · Aggregated, non-identifying usage data. “New users” is the Google Analytics acquisition metric.

How it works

Observe. Tap. Review.

A focused three-step workflow keeps every recorded event under your control.

1

Observe

Observe the breathing pattern and choose a consistent phase of the breathing cycle.

2

Tap

Tap the Lungs button at the beginning of each observed inspiration.

3

Review

Review the calculated breathing frequency and any enabled Pro information.

Interactive Rhythm Lab

Set the rhythm.
Test Respi-Rate.

Create a known breathing pattern, then use Respi-Rate on your iPhone to calculate its breathing frequency. Change both the frequency and the inspiratory-to-expiratory ratio.

16 /min
6 /min40 /min
1 : 2.0
1 : 11 : 3

The rhythm updates immediately and continues running while this page is open.

Inhale

16 breaths/minI:E 1 : 2.0 · Experimental

Respi-Rate app icon Your challenge

Open Respi-Rate on your phone.

Watch the animated lungs and press the Lungs button in the app at the beginning of each inspiration. Then compare the recorded result with the reference rhythm.

Get Respi-Rate

Demonstration only. This animation provides a reference rhythm for practising the manual measurement workflow.

Respi-Rate Pro

More from each
manual measurement.

Five focused additions for reviewing and presenting manually recorded measurements.

History Pro

Stores previous measurements locally on the device.

Regularity Pro

Summarizes the consistency of manually recorded intervals.

I:E Timing Pro · Experimental

Displays the ratio between manually recorded inspiratory and expiratory phase timing.

Age Reference Intervals Pro

Compares the recorded value with published age-specific reference intervals for informational comparison.

Dark Mode Pro

Provides a darker appearance for low-light environments.

7 days free

Try every Pro feature.

The 7-day trial and Lifetime Pro are offered through Apple StoreKit. The trial creates no auto-renewing subscription or automatic charge. Core breathing-frequency measurement remains free.

Explore Respi-Rate Pro

Latest News

Product updates.

View all news News Archive

Managed deployment

Respi-Rate for organizations

Interested in deploying Respi-Rate on managed work devices? Tell us about your organization and deployment needs.