Circular Ring vs Capillus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Circular Ring
This platform offers comprehensive health tracking and improvement tools. It provides deep insights into sleep, recovery, stress, heart health, and activity, with personalized recommendations from an AI coach to help users understand and optimize their wellness.
- Sleep Monitoring
- Energy Score
- Heart Rhythm Monitoring
- Stress Tracking
- Coherence Training
- AI Health Coach (Kira)
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Circular is the world’s most complete health improvement platform, offering 13+ features to help you optimize your wellness. Paired with the Circular Ring, the Circular app provides deep insights into your sleep, recovery, stress, heart health, energy levels, activity, and much more, making it easy to understand and improve your health over time. Through the Circular ring, track your biosignals, 24/7. With the Circular app, unleash the full potential of data. FEATURES Each feature is called a Circle, allowing you to personalize your health journey. Activate or customize Circles anytime in the "Manage My Circles" section. -Sleep Monitoring – Get a detailed sleep quality score with contributors and trends to optimize your rest. -Energy Score – Understand your daily readiness and recovery with biometric-based scoring. -Heart Rhythm Monitoring – Track your heart rhythm with real-time insights and detect irregularities. -Stress Tracking – See how your body responds to daily challenges and learn to manage stress effectively. -Coherence Training – Use guided breathing exercises with real-time biometric tracking to enhance focus and relaxation. -Women's Health Tracking – Monitor your cycle and hormonal changes for a better understanding of your body. -Activity & Sport Sessions – Track workouts, daily movement, and exertion levels to optimize performance. -Live Measurements – Take spot-check readings of your vitals, and activity data. -Vital Alerts – Get notified when your biosignal levels exceed your set thresholds. -Smart Alarm Clock – Wake up at the optimal moment in your sleep cycle. -Medication Reminders – Setup your medication routine and stay on track with alerts for scheduled doses. -Personal Diary & Calendar – Add notes and track trends in your health data. -Challenges & Gamification – Earn Circular Coins, streaks, and badges while improving your health. PERSONAL AI HEALTH COACH – KIRA Kira is your AI-driven wellness assistant, helping you interpret your data and make better health decisions with: Automatic day & night cross-data correlation Personalized, science-backed recommendations Event validation & insights based on your lifestyle ADVANCED ANALYTICS & CALIBRATION Machine learning-powered scoring – Circular cross-analyzes your health metrics to generate detailed, data-driven wellness scores. 14-Day Calibration – Kira learns your unique patterns by collecting baseline data, setting reference values, and adjusting recommendations to fit your profile. ADDITIONAL TOOLS Airplane Mode – Disable data transmission for privacy and extended battery life. Timer – Set custom vibration alerts. COMPATIBILITY & SUPPORT Circular Ring required – The app works exclusively with a Circular Ring. Bluetooth required – Background Bluetooth usage may reduce battery life. Important: Circular is not a medical device and does not provide medical diagnoses. For any health concerns, consult a doctor. Need help? Visit https://www.circular.xyz/help or email support@circular.xyz. Need Ring? Visit https://www.circular.xyz/ Learn more: https://www.circular.xyz/learn.
Capillus
This app enhances your hair regrowth journey by integrating with a red light therapy cap. It offers tracking tools, Bluetooth connectivity, and progress photo capabilities to help you stay consistent and monitor your results.
- Bluetooth connectivity with therapy cap
- Daily treatment tracking
- Progress photo documentation
- Customizable reminders
- Hair care tips and support
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Your hair regrowth journey, tracked in one place. The Capillus App connects to your Capillus Red Light Therapy Cap over Bluetooth and gives you everything you need to stay consistent with your treatment, from session timers to progress photos. TREATMENT TRACKER Connect your cap via Bluetooth, start your 6-minute session, and let the app log it. Every completed session is automatically recorded in your weekly and monthly calendar, so you always know exactly where you stand. The recommended protocol is one session per day, and the app helps you stick to it. PROGRESS TRACKER Take high-quality progress photos from four different angles: crown, temples, and front hairline, and the app organizes them into albums automatically. Compare before-and-after photos side by side to see your own regrowth journey unfold over time. STAY ON TRACK Personalize your account settings, manage treatment reminders, and get hair care tips designed to help you get the most out of every session. BACKED BY FDA-CLEARED TECHNOLOGY Capillus laser caps use FDA-cleared, clinically studied red light therapy (low-level laser therapy) to support hair regrowth. The Capillus App works with Bluetooth-enabled Capillus devices to help you track your treatment and stay consistent. Learn more at capillus.com. Individual results may vary. The information provided in this app is not medical advice, consult a physician regarding any medical concerns.
Screenshots
Verdict
The clearest difference is rating: Circular Ring at 2.8 against Capillus's 1.9. Circular Ring also leads on ratings volume (493 vs 30). Capillus's advantage is review sentiment (27% vs 16%). On price, update cadence, ads and in-app purchases 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.
Circular Ring holds the better App Store score, 2.8 against 1.9. That said, the two scores are not equally well evidenced: Circular Ring has 493 ratings behind it against 30, so its average is the more settled of the two. Written reviews complicate that: 16% of Circular Ring's written reviews are positive against 27% of Capillus's, so the app with the better star average is not the one people write more warmly about.
Circular Ring ships an update every 2 weeks, Capillus weekly. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.
| Parameter | Circular Ring | Capillus |
|---|---|---|
| Price | Free | Free |
| Rating | 2.8 (493 ratings) — better | 1.9 (30 ratings) |
| Positive reviews | 15.9% of reviews | 27.3% of reviews — better |
| Number of ratings | 493 — better | 30 |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 198 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | Circular | Capillus |
Customer experience
Circular Ring
Capillus
In-app purchases
Circular Ring
No in-app purchases
Capillus
No in-app purchases









