CPR skills begin to fade within weeks of a course, and most people don’t recertify for years. The Life Safe CPR Coach app is built to close that gap: using your phone’s camera and AI-powered hand tracking, it gives you real-time feedback on your compression technique as you practise at home — no manikin, no classroom. This tutorial walks through setup, how to read the feedback, and practice routines that keep your technique sharp between courses.

What the CPR Coach App Does

The CPR Coach uses your phone’s front or rear camera to track your hand movements in real time as you perform chest compressions. The AI analyses each compression and provides instant feedback on the metrics that determine whether CPR is effective:

Adult CPR targets shown by the app — depth 5–6 cm, rate 100–120/min, full recoil — per Canadian Red Cross 2025 & Heart & Stroke Foundation (ILCOR 2025 BLS).

Getting Started: Setup in 30 Seconds

Understanding the Feedback

The app provides continuous feedback during your session. Here is what to watch for and how to improve:

“Too shallow” / depth indicator in the red zone: You are not pushing deep enough. For an adult, aim for a depth of 5–6 cm — at least 5 cm, but no more than 6 cm. This is the most common issue, especially when practising on a soft surface. Focus on using your body weight rather than arm strength — keep your arms straight with your shoulders directly above your hands, and compress from your core. If your practice surface is too soft, switch to a firmer cushion or add a hardback book underneath.

Adult compression depth 5–6 cm (avoid deeper than 6 cm): Canadian Red Cross 2025; Heart & Stroke / ILCOR 2025 BLS (per ERC 2025 BLS).

“Too fast” or “Too slow” / rate indicator off target: Aim for 100–120 compressions per minute. If you find yourself drifting, try compressing to the rhythm of a song at roughly 100–120 BPM — “Stayin’ Alive” is the classic. The app may provide a metronome or audio guide to help you lock into the right tempo.

Adult compression rate 100–120/min: Canadian Red Cross 2025; Heart & Stroke / ILCOR 2025 BLS.

“Incomplete recoil” / recoil indicator flagging: You are leaning on the practice surface between compressions. Make a conscious effort to lift your weight completely between each push. Your hands should stay in contact with the surface, but your body weight should not be resting on it during the upstroke — leaning stops the heart from refilling between compressions.

Allow full chest recoil; don’t lean on the chest: Canadian Red Cross 2025; Heart & Stroke / ILCOR 2025 BLS.

Consistency score dropping: Fatigue is usually the cause. As you tire, compressions tend to become shallower and slower. This is exactly what happens during real CPR — knowing your fatigue point helps you prepare. In a real emergency, switch rescuers about every 2 minutes to maintain effective compressions.

Swap rescuers roughly every 2 minutes to limit fatigue: Canadian Red Cross 2025; ILCOR 2025 BLS.

Recommended Practice Routines

The 10-Minute Monthly Refresher

This is a practical routine for maintaining your skills between courses. Set a monthly reminder on your phone and commit to this short routine:

1. 2 minutes of continuous compressions — focus on rate and depth
2. 30-second rest — review your feedback scores
3. 2 minutes of compressions — focus on full recoil and consistency
4. 30-second rest
5. 2 minutes of 30:2 cycles — practise switching between compressions and pausing for imaginary rescue breaths (count to 2 during each pause)
6. Review your session summary and note areas to improve next time

30 compressions to 2 breaths is the standard adult single-rescuer ratio: Canadian Red Cross 2025; Heart & Stroke / ILCOR 2025 BLS.

The Pre-Course Tune-Up

Do this a few days before your recertification course to shake off the rust:

1. Three rounds of 2-minute compression sets with 1-minute rests
2. Focus on one metric per round (depth, then rate, then recoil)
3. End with 5 minutes of 30:2 cycles to simulate a full CPR scenario

The New Parent Confidence Builder

If you have just taken a course and want to lock in your skills before baby arrives:

1. Practise for 10 minutes, three times during the first week after your course
2. Then once a week for the next month
3. Then once a month ongoing

This spaced repetition pattern — frequent practice early on, tapering to maintenance intervals — reflects well-established principles of skill retention.

How the App Complements In-Person Training

The CPR Coach app is not a replacement for a certified CPR course. Here is what each provides and why both matter:

What in-person training provides that the app cannot: Correct hand placement on an anatomically accurate manikin. Rescue breath technique, including head tilt, chin lift, and mouth-to-mouth seal. Airway management and AED use. Instructor feedback on the subtleties of your technique. Certification and legal qualification to perform CPR.

What the app provides that the classroom cannot: Ongoing practice between courses — available anytime, anywhere. Real-time metric tracking over weeks and months, so you can see skill decay and correct it. No scheduling, no travel, no cost per session. The ability to practise in the exact setting where emergencies happen: your home.

Together, they form a complete training cycle: learn the skills in a classroom, maintain them with the app, and recertify to stay current with the latest guidelines.

Tips for Getting the Most Out of the App

• Good lighting matters. The AI hand tracking works best in well-lit environments. Practise near a window during the day or under bright indoor lighting.
• Keep the camera steady. A phone that shifts during your session will produce inconsistent tracking. Use a stable prop or phone stand.
• Wear contrasting clothing. The hand tracking algorithms work best when your hands contrast with the background. Avoid dark gloves on a dark cushion.
• Track your progress over time. The app saves your session history so you can see trends. Are your depth scores improving? Is your consistency getting better? Use this data to focus your practice on your weakest metric.
• Set a recurring reminder. The biggest barrier to practice is simply forgetting. A monthly phone reminder takes two seconds to set up and keeps you on track indefinitely.

Frequently Asked Questions