Kegel Study vs NoR∆ Dynamics
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kegel Study
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This App was designed by urology faculty from the Department of Urology at the University of California San Francisco (UCSF). This App is designed for both women and men. The main (and unique!) feature of this App is it’s biofeedback feature, which allows users to measure the most important element of a Kegel exercise: how they spend contracting and relaxing their pelvic muscles during each exercise. Kegel Nation also lets users track how often they do their Kegel, and, other important elements of their urinary function: how often they feel urinary urgency, the number of trips to the bathroom, the number of incontinence (urinary leakage) events, and, number of urinary pads used. During treatment, it essential to accurately track these urinary function events, as this helps us (physician and patient) to determine whether there is progress over time and/or a satisfactory response to treatment with recommended changes in habits or with medications. Kegel Nation also allows users to graph all of their own Kegel exercise and urinary function data, to make it easier to see trends to either share with their doctor or for their own health charting. The target audience for this App are UCSF Department of Urology clinical study subjects who have agreed to participate in a clinical study using this App. Each subject will have given written consent to participate in the clinical study. Upon enrolling in the clinical study in our clinic, each subject will be assigned a unique Study ID number, which unlocks the downloaded App. To use the app, each subject enters their unique Study ID, which allows them to use the App. The app automatically pushes their study data to the Study database-- labeling each study subject's data with their unique Study ID-- for "within subject" data analysis within the study database housed upon a commercial server. That code(Study ID) is generate by Admin Panel and if anyone having this study ID than only user can use this application. This application will use for research and study purpose.
NoR∆ Dynamics
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NoRΔ – Hemodynamic Modeling NoRΔ is an educational and research-focused platform designed for physicians interested in arterial waveform physiology and cardiovascular modeling. The application enables structured exploration of arterial pressure morphology and algorithm-based hemodynamic representations using user-provided data inputs. Waveform Exploration • Educational waveform import and curve tracing • Visualization of systolic upstroke characteristics • Multi-cycle respiratory variation modeling Hemodynamic Modeling The platform provides algorithmic representations of parameters such as: • Cardiac Output (CO) • Stroke Volume (SV) • Pulse Pressure Variation (PPV) • Dynamic Arterial Elastance (Ea_dyn) • Systemic Vascular Resistance (SVR) All outputs are mathematical estimations intended solely for educational and research exploration. Intended Audience Developed for licensed physicians, medical residents, fellows, and healthcare professionals engaged in advanced hemodynamic education. Important Notice NoRΔ is an educational and research software application. It is not a medical device. It is not intended for diagnosis, patient monitoring, or therapeutic decision-making. The software has not been evaluated, cleared, or approved by the U.S. FDA, ANVISA, or any regulatory authority. Users are solely responsible for independent clinical judgment.
Screenshots
Verdict
The clearest difference is update cadence: NoR∆ Dynamics at every 3 days against Kegel Study's every 21 months. Kegel Study's advantage is iOS requirement (8.0 vs 26.2). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Kegel Study ships an update every 21 months, NoR∆ Dynamics every 3 days. The most recent releases landed on September 10, 2026 and September 23, 2026 respectively.
| Parameter | Kegel Study | NoR∆ Dynamics |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 21 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 85 MB | 4 MB |
| Age rating | 17+ | 12+ |
| Developer | University of California at San Francisco | Lukas Madeira |
In-app purchases
Kegel Study
No in-app purchases
NoR∆ Dynamics
No in-app purchases








