Comparison

ENGAGE vs Observe.

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ENGAGE

This app helps participants in a heart failure research study manage their condition. It allows users to track vitals, medication adherence, and health status, providing insights for personalized care and improved well-being. Educational resources and a health summary feature further support users in their heart health journey.

Highlights
  • Daily and two-week check-ins
  • Vitals tracking (blood pressure, heart rate, weight)
  • Medication adherence monitoring
  • Health status questionnaires (KCCQ-12, dizziness)
  • Engagement score for motivation
  • Health summary PDF sharing
  • Educational videos on heart failure management
Features
Read full description

Disclaimer: This app is only for participants in the ENGAGE-HF research study.Disclaimer: This app is only for participants in the ENGAGE-HF research study. Welcome to ENGAGE-HF, your personalized heart health companion! Developed by Stanford University using the Stanford Spezi framework in collaboration with the DOT HF network, funded by the American Heart Association Health Tech SFRN, this app is designed to make managing heart failure easier and more effective. With ENGAGE-HF, you have the power to optimize your heart failure treatment plan and improve your overall well-being. Our app simplifies the process of getting the best combination of medicines to help you live longer and healthier. By tracking your vitals and health status over time, you'll be more engaged in your heart failure care, allowing for personalized interventions and better health outcomes. Your heart health journey begins with the main dashboard, where you'll find daily check-ins and two-week check-ins, closely monitoring your heart health. During your daily check-in, you'll provide vital health status information, and the app will help you track your medication adherence, giving you valuable insights into your progress. We encourage active participation in your heart health management, and to motivate you further, ENGAGE-HF features an engagement score. By completing app activities, like answering daily health status questions, reporting medication adherence, and checking vitals, you'll increase your score, empowering you to stay on track. Inside the app, you'll discover three main pages: Vitals, Health Status, and Medication. The Vitals page lets you view your blood pressure, heart rate, and weight measurements. On the Health Status page, we utilize the Kansas City Cardiomyopathy Questionnaire-12 (KCCQ-12), the dizziness questionnaire, and the daily health status question, giving you a comprehensive view of your heart failure symptoms and overall well-being. The Medication page offers detailed information about your core heart failure medications. The Health Summary feature presents a comprehensive overview of vitals, health status scores, and medications, empowering you to prepare questions for your clinicians. Easily share a PDF summary with healthcare providers or caregivers, fostering collaborative care. The ENGAGE-HF app offers short educational videos to deepen your understanding of heart failure management. Learn about app usage, heart failure medications, and monitoring from expert insights provided by the American Heart Association and the Heart Failure Society of America. Get ready to empower your heart health with ENGAGE-HF! Start your journey to a healthier and happier life. Download the app now and take charge of your heart failure management!

About

Observe.

Read full description

Observe, user-friendly app designed for healthcare professionals to assess heart failure with preserved ejection fraction, featuring the Heart Failure Association (HFA) of the European Society of Cardiology (ESC) scoring systems: HFA-PEFF and H2FPEF (U.S. Score) guidelines. A precise tool to calculate HFpEF risk score using functional, morphological, and biomarker data. It gives a probability and percentage estimation of HFpEF, aiding diagnosis. However, it's not a substitute for professional medical advice or diagnosis. Healthcare providers should rely on comprehensive medical evaluations and their expertise when interpreting results.

Screenshots

ENGAGE4 screens
Observe.4 screens

Verdict

The call

The clearest difference is update cadence: ENGAGE at every 2 months against Observe.'s every 8 months. Observe.'s advantage is iOS requirement (13.0 vs 17.4). On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ENGAGE ships an update every 2 months, Observe. every 8 months. The most recent releases landed on October 7, 2026 and October 19, 2026 respectively.

Scorecard2 real differences · 7 level
ENGAGE versus Observe.: the parameters behind the verdict, then further details
ParameterENGAGEObserve.
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 months — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.413.0 — better
Further details — not scored
Size70 MB29 MB
Age rating17+4+
DeveloperStanford UniversitySELECT ICT Systems SAE

In-app purchases

None

ENGAGE

No in-app purchases

None

Observe.

No in-app purchases

Questions

Is ENGAGE free?
ENGAGE is free to download, with no in-app purchases.
Is Observe. free?
Observe. is free to download, with no in-app purchases.
Do ENGAGE or Observe. have ads?
Neither ENGAGE nor Observe. shows ads.
Which is updated more often, ENGAGE or Observe.?
ENGAGE ships an update every 2 months, and Observe. every 8 months. Most recently, ENGAGE was updated on October 7, 2026 and Observe. on October 19, 2026.

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