Power Nap Tracker vs Preventicus Heartbeats.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Power Nap Tracker
Optimize your short sleep sessions to feel refreshed and productive. This app tracks your movements during naps and gently wakes you at your chosen duration, preventing grogginess. Enjoy beautiful nature sounds and review your nap patterns with insightful graphs.
- Monitors nap duration up to 3 hours
- Gentle wake-up with natural sounds
- Nap profile graphing
- Records loudest sounds during sleep
- Background operation
- Snooze function
Read full descriptionHide full description
Recharge with Power Nap Tracker. Get just the right amount of sleep to feel your best for the rest of the day. A short nap of 10-30 minutes does wonders for your thinking and productivity. But napping too long can leave you feeling groggy and disoriented. Power Nap Tracker helps you feel fresh and reenergized by monitoring your nap and waking you up after you've gotten the amount of rest you choose. Power Nap Tracker will monitor your movements and wake you when you’ve reached your desired nap length, up to 3 hours. Enjoy waking up to a catalog of beautiful high-quality sounds recorded live around the world and feel fresh and rejuvenated all day. After your nap you can view your nap profile on a graph. From the creators of popular Rain Sounds HQ and Sleep Sounds HQ sleep sound apps, we’ve packed all this capability into a simple and beautiful app that works! Try Power Nap Tracker today and recharge with the perfect nap. Power Nap Tracker features: • Measures your nap and wakes you after the nap time you choose, up to 3 hours. • Wakes you gently to a catalog of beautiful natural sounds from around the world. • After your nap you can view your nap profile on a graph. • Captures the loudest sound during your nap, so you can hear noise, snoring or talking in your sleep. • Works in background or with the screen locked. • Snooze function allows you to extend your nap a little longer. • Long high-quality stereo recordings with beautiful high-definition images. • Modern easy-to-use interface, tailored for nap time and gentle wake up. Download Power Nap Tracker now. Image credits: http://www.phase4mobile.com/image-credits/
Preventicus Heartbeats.
Monitor your heart rhythm using your smartphone camera for quick and detailed analysis. Detect potential cardiac arrhythmias like atrial fibrillation with regular use. Receive expert review for abnormal results and personalized heart health articles.
- Heart rhythm analysis via smartphone camera
- One-minute heart rhythm test
- Detection of cardiac arrhythmia
- Detailed analysis and recommendations
- Expert review of abnormal results
- Personalized heart health articles
Read full descriptionHide full description
Check your heart rate at any time using your smartphone camera, identify risks early on, and discover personalised daily recommendations based on a 360° view of your health. YOUR PERSONAL GUIDE TO GOOD CARDIOVASCULAR HEALTH – SIMPLE, COMPREHENSIVE AND MEDICALLY RELIABLE. The Preventicus Heartbeats app measures your heart rhythm via your smartphone and helps you to identify and manage cardiovascular risks at an early stage. This certified medical device reliably detects signs of cardiac arrhythmias – such as atrial fibrillation – particularly when used regularly, with the aim of preventing stroke and dementia, amongst other things. If any abnormalities are detected, the ECG-comparable analyses can be quality-checked at the Telecare Centre (included in the Value Package), thereby supporting a follow-up consultation with a doctor. COMPREHENSIVE 360° HEALTH ASSESSMENT The 360° Health Compass included in the Value Package also provides a comprehensive overview of your well-being and potential emerging lifestyle risks relating to cardiovascular health, mental health, metabolism and mobility. This is achieved through targeted questionnaires, simple tests and advanced digital biomarkers derived from measurements taken via a smartphone camera. Subsequently, consistent, personalised recommendations tailored to everyday life help you maintain and improve your personal health and risk profile. WHO IS IT SUITABLE FOR? The product is aimed at health-conscious and proactive individuals, particularly those of middle age and above, but especially those with or recovering from pre-existing conditions such as high blood pressure, diabetes, cardiovascular diseases (stroke, heart attack, coronary heart disease) and sleep apnoea. It is also suitable for those with increased risks, for example due to being overweight or nicotine or alcohol consumption. GOOD TO KNOW As part of a stroke prevention programme, many health insurance providers cover the cost of the app for their policyholders and offer additional services. The highest data protection standards are a matter of course for us. Preventicus Heartbeats is one of Europe’s most rigorously validated technologies for atrial fibrillation screening, backed by more than 25 international studies. For over 10 years, it has consistently ranked among the top German health apps, with a customer satisfaction rate of over 96%. INTENDED PURPOSE The Preventicus Heartbeats app is used to detect cardiac arrhythmias in the form of a suspected diagnosis, and to determine and characterise heart rate. The following cardiac arrhythmias can be detected: absolute arrhythmia with suspected atrial fibrillation, extrasystoles and irregular heartbeats, heart rate with signs of bradycardia and tachycardia. The result obtained is only a possible suspicion (“suspected diagnosis”), not a diagnosis in the medical sense. The results obtained are for information purposes only and under no circumstances a substitute for personal diagnosis, advice, care or treatment from a medical or medically trained professional. You can find safety warnings in our instruction for use: https://www.preventicus.com/manuals-preventicus-heartbeats-app/ This app must not be used to make decisions in situations perceived as life-threatening (e.g. a heart attack). We’re happy to help with any questions you may have about the app and the ‘RhythmusLeben’ wellness programme: Telefon: +49 (0) 36 41 / 55 98 45-1 E-Mail: support@preventicus.com The Preventicus Heartbeats app is a certified Class IIa medical device in accordance with Regulation (EU) 2017/745. Manufacturer: Preventicus GmbH | Ernst-Abbe-Str. 15 | 07743 Jena, Germany SRN: DE-MF-000008931 UDI-DI (IOS): (01) 4099966 00024 3
Screenshots
Verdict
The clearest difference is in-app purchases: Power Nap Tracker at none against Preventicus Heartbeats.'s 8. Power Nap Tracker also leads on rating (4.4 vs 4.0) and review sentiment (63% vs 38%). Preventicus Heartbeats.'s advantage is ads (none vs shown). On price, ratings volume, update cadence and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Preventicus Heartbeats. sells 8 in-app purchases, starting at $5.99 per month. Power Nap Tracker asks for nothing beyond the download.
Power Nap Tracker holds the better App Store score, 4.4 against 4.0. Both are backed by a comparable volume of ratings — 227 and 92 respectively. Written reviews point the same way: 63% of Power Nap Tracker's written reviews are positive against 38% of Preventicus Heartbeats.'s.
Power Nap Tracker ships an update every 5 months, Preventicus Heartbeats. every 4 months. The most recent releases landed on October 20, 2026 and October 22, 2026 respectively.
| Parameter | Power Nap Tracker | Preventicus Heartbeats. |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (227 ratings) — better | 4.0 (92 ratings) |
| Positive reviews | 63.0% of reviews — better | 37.9% of reviews |
| Number of ratings | 227 — better | 92 |
| Update frequency | Every 5 months | Every 4 months — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 92 MB | 88 MB |
| Age rating | 4+ | 17+ |
| Developer | Phase4 Mobile | Preventicus GmbH |
Customer experience
Power Nap Tracker
Preventicus Heartbeats.
Bugs and requests
Power Nap Tracker
Reported bugs
12 issues- Snooze feature should be eliminated
- Alarm volume is max, not gradual
- App disconnects headphones
- Cannot get past “consent needed” message
- App stuck on the "consent needed" screen
Show 7 moreShow fewer
- No history to evaluate naps/progress
- Doesn't track sleep accurately
- Cannot distinguish sleep from wakefulness
- No Apple Health integration
- Doesn't log data in Health app
- Aesthetics and ergonomics need review
- Free version claims alarm sounds but doesn't have them
Requested features
11 requests- Add option to show how much sleep you've had
- Add option to show current time and remaining time
- Add option to show elapsed time during measurement
- Clarify the basis for 0 minute sleep recording
- Share naps with iPhone Health app
Show 6 moreShow fewer
- Retain sleep information until app is used again
- Add a version for full night's sleep tracking
- Add option to record sleep data in Health app
- Add animation when stopping the alarm and summary is displayed
- Option to pay to remove ads
- Add possibility to record sleep data in the Health app and save it in the sleep tracker itself
Preventicus Heartbeats.
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Power Nap Tracker
No in-app purchases
Preventicus Heartbeats.
- Classic - 1 Month$5.991 Month
- Value - 1 Month7 Days trial$9.991 Month
- Classic – Half-Year$24.996 Months
Show 1 moreShow fewer
- Value – Half-Year7 Days trial$39.996 Months
- FULL VERSION 1 month$5.99
- Telecare Service single report$11.99
- Full Version 6 month$24.99
Show 1 moreShow fewer
- Telecare Service five reports$39.99




