Comparison

Stress Tracker HRV vs Sun Ring

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

Head to head
About

Stress Tracker HRV

Monitor your body's stress levels, sleep quality, and recovery using Heart Rate Variability (HRV) data from your Apple Watch. Gain insights into your mental and physical well-being to make informed decisions about rest and activity.

Highlights
  • Real-time stress tracking via HRV
  • Daily and weekly stress trend analysis
  • Recovery Index for bounce-back assessment
  • Sleep score and optimization insights
  • On-device data privacy
Features
Read full description

Stress tracking with HRV, sleep insights & recovery in one simple app. Feel tired, anxious, or burned out without knowing why? This app gives you answers, not guesses. Stress Tracker uses Heart Rate Variability (HRV) to show your real stress level, sleep quality, and how well you’re recovering — all from your Apple Watch. Track your daily stress instantly. See how it changes across the day or week. Know when to rest, recover, or push forward with data-backed clarity. Features: • Real‑time stress tracking based on HRV • Daily & weekly stress trends • Recovery Index to see how you bounce back • Sleep score and insights to optimize rest • Fully private – nothing leaves your device Get clarity over your mental and physical health. Stop guessing. Start tracking.

About

Sun Ring

This app encourages daily sun exposure by using a familiar ring-closing mechanic. Users can customize their daily goals and track progress with watch face complications and notifications. Review historical data to maintain streaks and stay motivated to enjoy the outdoors.

Highlights
  • Gamified daily sun exposure tracking
  • Customizable daily sun exposure goals
  • Adjustable 'direct sunlight' lux value
  • Watch face widgets and complications
  • Goal completion notifications
  • Daily progress history and streak tracking
Read full description

Sun Ring gamifies daily sun exposure in a format Apple Watch owners will find very familiar: closing a ring. Easily glance at your progress for the day and motivate yourself to go outside to reach your goal. CUSTOMIZABLE THRESHOLDS Set how many minutes you'd like to be in the sun each day, and motivate yourself to enjoy the outdoors. Change what Sun Ring considers as "direct sunlight" by adjusting the minimum lux value your Apple Watch counts towards your goal. WIDGETS/COMPLICATIONS Easily view and keep track of your daily progress right from your watch face. Watch your Sun Ring close throughout the day and inch closer toward your goal. NOTIFICATIONS Never miss out on reaching your goal by turning on Goal Completion notifications. Your Apple Watch will send you a celebratory notification when you have reached or surpassed your daily sun exposure goal. HISTORY Remain motivated by looking at the progress you've made over the past few days and keep your streak alive! Easily see which days you fell short or exceeded your goal and closed your ring. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Verdict

The call

The clearest difference is price: Sun Ring at Free against Stress Tracker HRV's $7.99. Stress Tracker HRV's advantage is iOS requirement (13.0 vs 17.0). On rating, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Sun Ring is free to download; Stress Tracker HRV costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Stress Tracker HRV against 5.0 for Sun Ring. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Scorecard3 real differences · 7 level
Stress Tracker HRV versus Sun Ring: the parameters behind the verdict, then further details
ParameterStress Tracker HRVSun Ring
Price$7.99Free — better
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 5 weeks—
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPod, Apple Watch — betteriPhone, Apple Watch
Requires iOS13.0 — better17.0
Further details — not scored
Size5 MB2 MB
Age rating4+4+
DeveloperAlvaro Garcia PizarroAaron Taylor

Customer experience

Stress Tracker HRV

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Sun Ring

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Stress Tracker HRV

No in-app purchases

None

Sun Ring

No in-app purchases

Questions

Is Stress Tracker HRV free?
Stress Tracker HRV costs $7.99, with no in-app purchases.
Is Sun Ring free?
Sun Ring is free to download, with no in-app purchases.
Which has better reviews, Stress Tracker HRV or Sun Ring?
Stress Tracker HRV and Sun Ring are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Stress Tracker HRV or Sun Ring have ads?
Neither Stress Tracker HRV nor Sun Ring shows ads.

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