SOUND HSA vs Sun Day Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SOUND HSA
Earn Bitcoin rewards for your daily physical activity and save for future healthcare expenses. This health savings account allows you to invest in Bitcoin for medical needs.
- Earn Bitcoin for movement
- Health savings account
- Save in Bitcoin for healthcare
- Join health-conscious community
- Waitlist signup
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Move, Earn, and Save for Your Health – In Bitcoin. Join a growing community of health-conscious individuals turning daily movement into bitcoin rewards. Sign up for the waitlist of a health savings account (HSA) in which you can save in bitcoin for future healthcare expenses.
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
SOUND HSA and Sun Day Tracker both sit at 4.4 stars, but that hides the real split: 100% of SOUND HSA's written reviews are positive against 83% of Sun Day Tracker's. Sun Day Tracker's advantage is monetization model (free vs ad-supported) and ratings volume (28 vs 7). On price, rating, update cadence 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.4 for SOUND HSA against 4.6 for Sun Day Tracker. Both are backed by a comparable volume of ratings — 7 and 28 respectively. Written reviews are what separate them: 100% of SOUND HSA's written reviews are positive against 83% of Sun Day Tracker's.
SOUND HSA ships an update every 2 weeks, Sun Day Tracker monthly. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.
| Parameter | SOUND HSA | Sun Day Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (7 ratings) | 4.6 (28 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 83.3% of reviews |
| Number of ratings | 7 | 28 — better |
| Update frequency | Every 2 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 75 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | SOUND HSA | permissionless tech, llc |
Customer experience
SOUND HSA
Sun Day Tracker
In-app purchases
SOUND HSA
No in-app purchases
Sun Day Tracker
No in-app purchases
