# SOUND HSA vs Sun Day Tracker

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.

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.

## The numbers

| Metric | SOUND HSA | Sun Day Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (7 ratings)](https://appshunter.io/ios/app/sound-hsa/id6743316982/reviews) | **[4.6 (28 ratings)](https://appshunter.io/ios/app/sun-day-tracker/id6748545544/reviews)** |
| Number of ratings | 7 | **28** |
| Positive reviews | **100.0% of reviews** | 83.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Ad-supported | **Free** |
| Size | 75 MB | 1 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SOUND HSA](https://appshunter.io/developer/1802176098) | [permissionless tech, llc](https://appshunter.io/developer/1824145893) |

## What reviewers say

### SOUND HSA

[App page](https://appshunter.io/ios/app/sound-hsa/id6743316982)

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.

**Highlights:** Earn Bitcoin for movement, Health savings account, Save in Bitcoin for healthcare, Join health-conscious community, Waitlist signup

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Sun Day Tracker

[App page](https://appshunter.io/ios/app/sun-day-tracker/id6748545544)

Monitor your daily vitamin D absorption from sunlight exposure. This straightforward application helps you keep track of your sun-related vitamin D intake.

**Highlights:** Track daily vitamin D intake, Sunlight exposure monitoring, Simple interface, Daily tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SOUND HSA free?

SOUND HSA is free to download, with no in-app purchases.

### Is Sun Day Tracker free?

Sun Day Tracker is free to download, with no in-app purchases.

### Which has better reviews, SOUND HSA or Sun Day Tracker?

Sun Day Tracker is rated higher. SOUND HSA averages 4.4 out of 5 from 7 ratings, while Sun Day Tracker averages 4.6 from 28 ratings.

### Do SOUND HSA or Sun Day Tracker have ads?

Neither SOUND HSA nor Sun Day Tracker shows ads.

### Which is updated more often, SOUND HSA or Sun Day Tracker?

SOUND HSA ships an update every 2 weeks, and Sun Day Tracker monthly. Most recently, SOUND HSA was updated on October 24, 2026 and Sun Day Tracker on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*