Comparison

retimer Ring vs Stark Ring

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

Head to head
About

retimer Ring

This wearable companion tracks your sleep, activity, stress, and heart health to provide insights for better well-being. It offers advanced sleep stage analysis, VO₂ Max tracking, and supports 18 exercise modes, all accessible through a single app without a subscription.

Highlights
  • Comprehensive health tracking
  • Advanced sleep analysis
  • VO₂ Max estimation
  • 18 exercise modes
  • No subscription required
  • Activity and stress monitoring
Features
Read full description

retimer Ring – Your all-day, every-day health & wellness companion The retimer Ring is more than a wearable — it’s your everyday companion. Comfortable enough to be worn around the clock, it captures the signals from your finger that hold the key to better sleep, more energy, and lasting well-being. Comprehensive Health Tracking Monitor sleep, activity, stress, heart health, workouts, and recovery with precision. Get detailed insights to optimize your daily performance and long-term well-being. Advanced Sleep Tracking Gain deep insights into every stage of sleep — REM, Deep, Light, and Wakefulness. Track sleep debt, receive actionable nudges, and optimize your rest for better recovery. VO₂ Max Tracking Whether you’re an athlete in training or starting your fitness journey, the retimer Ring provides an accurate VO₂ Max score right from your finger — helping you boost performance, recovery, and longevity. Elevate Your Fitness Routine Track steps, measure VO₂ Max, monitor activity intensity, and estimate calories burned — all in one place. With 18 different exercise modes, the retimer Ring adapts to your lifestyle — whether you’re running, lifting, swimming, or cycling. One App, No Subscription Access all core features including sleep, stress, heart rate, HRV, skin temperature, recovery, VO₂ Max, and glucose indicators on the retimer app with no subscription required. How to Wear Your retimer Ring For best performance, wear the ring on the index finger of your non-dominant hand. Middle or ring fingers are also suitable. Ensure a comfortable fit — not too loose or tight. The ring sensor should face the palm side of your finger for accurate readings. [DISCLAIMER] Not a medical device This ring is not a medical device and should not be used as a substitute for professional medical judgement. It is not designed or intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment, or prevention of any condition or disease. Please consult your healthcare professional prior to making any decisions related to your health. This application and its associated hardware are intended for wellness and fitness purposes only. They are not medical devices and are not designed to diagnose, treat, cure, or prevent any disease. The data and analysis provided by the app are for personal reference only and should not be used as a substitute for professional medical advice. Always consult a qualified healthcare provider before making medical decisions.

About

Stark Ring

Features
Read full description

• Redesigned Home, Pulse, Activity, and Sleep tabs • Clearer health metrics and sleep timeline • Smoother tab navigation • Bug fixes and stability improvements

Screenshots

retimer Ring4 screens
Stark Ring4 screens

Verdict

The call

The clearest difference is update cadence: retimer Ring at every 9 days against Stark Ring's every 3 months. 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

retimer Ring ships an update every 9 days, Stark Ring every 3 months. The most recent releases landed on October 1, 2026 and September 28, 2026 respectively.

Scorecard1 real difference · 8 level
retimer Ring versus Stark Ring: the parameters behind the verdict, then further details
Parameterretimer RingStark Ring
PriceFreeFree
Rating4.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 9 days — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.615.1 — better
Further details — not scored
Size94 MB102 MB
Age rating17+4+
DeveloperRe-Time Pty LtdDien Nha Huyen

In-app purchases

None

retimer Ring

No in-app purchases

None

Stark Ring

No in-app purchases

Questions

Is retimer Ring free?
retimer Ring is free to download, with no in-app purchases.
Is Stark Ring free?
Stark Ring is free to download, with no in-app purchases.
Do retimer Ring or Stark Ring have ads?
Neither retimer Ring nor Stark Ring shows ads.
Which is updated more often, retimer Ring or Stark Ring?
retimer Ring ships an update every 9 days, and Stark Ring every 3 months. Most recently, retimer Ring was updated on October 1, 2026 and Stark Ring on September 28, 2026.

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