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77
BU Score
Strong

HeartWatch: Herzfrequenz

4.7 ✍️ Editor
✍️ BU Analytics Review

HeartWatch: Herzfrequenz is an iOS app from Tantsissa in the Health & Fitness category, currently rated 4.7★ across 13,583 ratings. Initial signal reads as mixed reviews — supporters praise core features while critics cite stability/value gaps.

Our BU Score puts it at 77Strong (healthy traction). For a Health & Fitness app, that means healthy traction.

Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.

creator

📊 Performance Tracking LIVE

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Rating
Reviews
Forecast Revenue / mo
Snapshots tracked
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since first record
Range:

💰 Forecast Revenue / mo

MODEL
Revenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 12 of 12 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
Mid install base (13,583 ratings)METRIC
+$5,500
Paid app ($0.00)METRIC
+$2,800
Excellent rating (4.7★)METRIC
+$2,200
worth every pennyREVIEW
+$2,000
bugsREVIEW
−$1,800
5 starREVIEW
+$1,800
excellent appREVIEW
+$1,500
Mature app (10y old)METRIC
+$1,500
Multilingual (13 languages)METRIC
+$1,500
highly recommendREVIEW
+$1,400
slowREVIEW
−$1,200
annoying adsREVIEW
−$1,100
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📈 Reviews Growth

LIVE
Cumulative review count from first BU snapshot. Each point = a tracked update.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Mar 25
Apr 25
May 25
Jun 25
Jul 25
Aug 25
Sep 25
Oct 25
Nov 25
Dec 25
Jan 26
Feb 26

⭐ Rating Trend

LIVE
Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY
Each bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →
💾 73 MB🔞 4+📱 iOS 11.0+🔖 v4.9🔄 updated 6mo ago🌐 NL, EN, FR, DE, IT +8📂 Health & Fitness💰 Paid🚀 Launched 2015 (10y old)

📝 About this app

"HeartWatch is so good, you’d think Apple built the app itself." John Patrick Pullen, Time Magazine. Top 5 in Health & Fitness in 100+ countries.

TOTAL PRIVACY
HeartWatch has no user analytics tracking. No advertising plugins. No 3rd party code. No data upload. Ask your "free" heart app if they can say the same.

ABOUT HEARTWATCH
HeartWatch is the best way to get a complete picture of all the health & fitness information captured by your Apple Watch.

NEWS
- Explore the different News Editions to learn all about your health progress and trends.
- Morning Briefing: read about your key health information to start your day
- Fitness Habits: news all about your fitness trends with a dynamic fitness habit tracker

WELLNESS
- An intelligent view of all key heart rate metrics. Daytime, Sedentary, Sleeping, Waking & Workouts.
- Detailed trend analysis including heart rate, blood pressure, HRV, blood glucose, blood oxygen (SpO2) and more.
- Background heart rate alerts on Watch with context.
- Note capture for individual heart rate readings.
- Detailed ECG analysis

ACTIVITY
- Every day isn’t the same. Intelligent move, distance & steps goals based on your current habits.
- Daily forecasting to help you stay on track to meet your goals.

WORKOUTS
- In depth analysis of heart rate, training summary, GPS maps and more.
- A heart focussed workout app on the Watch with custom alerts to keep you in the right zone.
- Detailed trend analysis.
- Stream workout info from your Watch to your iPhone.

JOURNAL & NOTES
- Keep a daily journal with notes and measurements
- View a detailed list with a complete overview of all notes, measurements and workouts
- Input notes and measurements from your Watch or iPhone. Includes blood pressure, temperature, blood glucose, weight, waist circumference and body fat percent.

GRAPHS & ANALYSIS
- Over 30+ health metrics to view
- Apply 7 day and 21 day trends to any metric, with the ability to overlap
- View over 6 weeks up to 12 months

EXPORT
- Export for all health metrics & workouts.

NOTHING IS MORE IMPORTANT THAN YOUR HEALTH
Heart Watch is a very useful tool to get alerted about any possible health issues in a concise format that you can show your medical practitioner.

INTEGRATION
HeartWatch connects beautifully with the Eclipse Yourself and AutoSleep apps, our premier sleep, activity, recovery and readiness monitoring apps.

HEART MONTH
Featured app in the official Apple Heart Month 2022:
https://www.apple.com/au/newsroom/2022/01/apple-celebrates-heart-month-with-new-resources-across-services

REQUIREMENTS
This app requires an iPhone that has the Health App installed. Heart readings are read from the Health Data Store which is ideally populated by your Apple Watch.

🆕 What's New · v4.9

Updated for iOS 26 and WatchOS 26.
Various fixes and maintenance.

Refer to our Whats New page for more detail: https://heartwatch.tantsissa.com/faq/whats-new

If your heart is loving HeartWatch, take a heartbeat to rate us 5 stars on the App Store! The great support helps us to keep monitoring your heart to better health.

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name
HeartWatch: Herzfrequenz
Developer
Tantsissa
Bundle ID
com.tantsissa.Heartbeat
App Store URL
Open in App Store
Category
Health & Fitness
Content rating
4+
Languages
NL, EN, FR, DE, IT, JA, KO, PT, RU, ZH, ES, SV, ZH

Company

Website
heartwatch.tantsissa.com
Tagline
🇨🇳 🇯🇵 🇪🇸 🇰🇷 🇧🇷 🇳🇱 🇫🇷 🇩🇪 🇮🇹 🇹🇼 🇷🇺 🇸🇪
Description
🇨🇳 🇯🇵 🇪🇸 🇰🇷 🇧🇷 🇳🇱 🇫🇷 🇩🇪 🇮🇹 🇹🇼 🇷🇺 🇸🇪
Founded
Not found
HQ / Address
Not found
Employees
Not found
Logo
OG image

Revenue

Verified revenue / mo
Not found
AI revenue estimate / mo
Not found
AI annual estimate
Not found
ML model estimate / mo
$32.1K/mo
Top-grossing rank
Outside top 100 in US Health & Fitness
All-time revenue
Not found
Pricing
Not found

Founder

Name
Not found
X / Twitter
Not found
LinkedIn
Not found
GitHub
Not found
X followers
Not found
Public statements
Not found

Funding

Total raised
Not found
Last round
Not found
Investors
Not found
Crunchbase
Not found
AngelList
Not found

Press & Links

Articles found
Not found
Listed on
Not found
Blog
https://heartwatch.tantsissa.com/news
Press / News
Not found

Contacts & Socials

Socials
youtube
Email
Not found
Phone
Not found
Contact page
https://heartwatch.tantsissa.com/support
About page
Not found
📈Ratings growth13,583 ratings+29% lifetimeShow 3-year history estimate ▾May 2023Jun 2025May 2026
Tracked (58 weeks) Pre-tracking estimate (36 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
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