Coherence vs Sun Day Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Coherence
Master your nervous system through guided breathwork. Access over 500 breathing patterns to shift your state, from calm and focus to energy and sleep. Connect with a global community in live sessions and create custom routines.
- Nervous system interface via breath
- Shift states: calm, focus, energy, sleep
- Daily global live breathing sessions
- 500+ research-backed breathing patterns
- Custom breathing sequence creator
- Progress tracking and stats
- Community features and leaderboards
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YOUR NERVOUS SYSTEM, ON DEMAND Coherence is a nervous system interface. Using the science of breath, shift into calm, focus, or energy in minutes. Your breath is the only autonomic function you can consciously control - a direct line to your nervous system. Coherence gives you the patterns to use it. SHIFT YOUR STATE - Calm: Activate your parasympathetic system to release stress - Focus: Enter alert relaxation for deep work - Energy: Stimulate your system for peak performance - Sleep: Downregulate for faster, deeper rest BREATHE WITH THE WORLD Join the Daily Sync - a live global session where people worldwide breathe together in perfect unison. Watch participants appear around a real-time 3D Earth. Set an intention. Experience collective coherence. 500+ BREATHING PATTERNS Techniques selected from peer-reviewed research and proven traditions: - Coherence: Heart-brain synchronization (5.5s rhythm) - Box Breath: Used by Navy SEALs for composure under pressure - 4-7-8: Vagal activation for rapid calm - Physiological Sigh: The fastest way to reduce stress - Vortex: Fibonacci-based energizing sequence - Tummo: Traditional Tibetan inner heat practice - Sleep, Focus, Energy patterns and more CREATE YOUR OWN Build custom breathing sequences with our visual editor. Set phase durations, add music from Spotify or Apple Music, record your own voice guidance, and share with the community. TRACK YOUR REGULATION - Streaks and daily practice stats - Session history and insights - Weekly progress visualization - Level progression system COMPETE & CONNECT - Weekly leagues with promotion and demotion - Global leaderboards - User profiles and friends - Invite others to sync sessions DESIGNED FOR FOCUS - Minimalist dark interface - Zen mode fades the UI so nothing distracts you - Beautiful animations guide your breath - Sonic cues keep you on rhythm - Works with screen off - Works in airplane mode SUBSCRIPTION All features require an active subscription: - Monthly: $9.99/month - Annual: $39.99/year (3-day free trial) - Cancel anytime in App Store settings Take control of your nervous system. Terms of Use: https://www.coherencebreath.com/terms Privacy Policy: https://www.coherencebreath.com/privacy
Sun Day Tracker
Monitor your daily vitamin D absorption from sunlight exposure. This straightforward application helps you keep track of your sun-related vitamin D intake.
- Track daily vitamin D intake
- Sunlight exposure monitoring
- Simple interface
- Daily tracking
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A simple app to track you daily vitamin D intake from the sun.
Screenshots
Verdict
The clearest difference is in-app purchases: Sun Day Tracker at none against Coherence's 6. Coherence's advantage is update cadence (every 4 days vs monthly) and ratings volume (566 vs 26). On price, review sentiment and ads 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. Coherence sells 6 in-app purchases, starting at $14.99 per month. Sun Day Tracker asks for nothing beyond the download.
Coherence holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Coherence has 566 ratings behind it against 26, so its average is the more settled of the two. Written reviews split almost evenly too, at 84% and 83% positive.
Coherence ships an update every 4 days, Sun Day Tracker monthly. The most recent releases landed on September 22, 2026 and September 19, 2026 respectively.
| Parameter | Coherence | Sun Day Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (566 ratings) — better | 4.6 (26 ratings) |
| Positive reviews | 84.0% of reviews — better | 83.3% of reviews |
| Number of ratings | 566 — better | 26 |
| Update frequency | Every 4 days — better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 176 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | John Sweeney | permissionless tech, llc |
Customer experience
Coherence
Sun Day Tracker
In-app purchases
Coherence
- Coherence Monthly Membership$14.991 Month
- Coherence Membership3 Days trial$69.991 Year
- Coherence Friend Pass14 Days trial$69.991 Year
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- Coherence Membership$69.991 Year
- Coherence Membership1 Month trial$69.991 Year
- Coherence3 Months trial$69.991 Year
Sun Day Tracker
No in-app purchases
