# Sunbathe vs Longevity Deck

The clearest difference is in-app purchases: Longevity Deck at none against Sunbathe's 1. Longevity Deck also leads on update cadence (every 4 days vs every 3 weeks). Sunbathe's advantage is review sentiment (100% vs 80%) and iOS requirement (15.1 vs 18.5). On price, ads and device support there is nothing between them.

Both are free to download. Sunbathe sells 1 in-app purchase, starting at $3.99 per month. Longevity Deck asks for nothing beyond the download.

Sunbathe ships an update every 3 weeks, Longevity Deck every 4 days. The most recent releases landed on June 4, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Sunbathe | Longevity Deck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (10 ratings)](https://appshunter.io/ios/app/longevity-deck/id6753670965/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | **100.0% of reviews** | 80.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Freemium | **Free** |
| Size | 43 MB | 78 MB |
| Requires iOS | **15.1** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Julia Alvarez de Eulate Sainz](https://appshunter.io/developer/1662471073) | [HYPE4MOBILE MALEWICZ I WSPOLNICY SPOŁKA JAWNA](https://appshunter.io/developer/501938616) |

## What reviewers say

### Sunbathe

[App page](https://appshunter.io/ios/app/sunbathe/id6449760948)

This app helps you understand your vitamin D needs and how to get enough through safe sun exposure. It calculates optimal sunning times and duration based on your location to prevent deficiency and related health issues.

**Highlights:** Vitamin D deficiency information, Optimal sun exposure timing, Personalized duration calculations, Location-based recommendations, Health benefit insights

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sunbathe Premium | $3.99 | per month |


### Longevity Deck

[App page](https://appshunter.io/ios/app/longevity-deck/id6753670965)

Track over 125 science-backed health protocols, from sauna and cold plunge to sleep optimization and supplements. Get automatic updates based on the latest research and expert recommendations. Prioritizes user privacy with no account or data collection required.

**Highlights:** Track 125+ science-backed protocols, Automatic research updates, Visual timeline tracking, Privacy-focused, no account needed, Optional Apple HealthKit integration, Home screen widgets for key metrics

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

**In-app purchases:** none


## Frequently asked questions

### Is Sunbathe free?

Sunbathe is free to download, with in-app purchases available.

### Is Longevity Deck free?

Longevity Deck is free to download, with no in-app purchases.

### Do Sunbathe or Longevity Deck have ads?

Neither Sunbathe nor Longevity Deck shows ads.

### Which is updated more often, Sunbathe or Longevity Deck?

Sunbathe ships an update every 3 weeks, and Longevity Deck every 4 days. Most recently, Sunbathe was updated on June 4, 2026 and Longevity Deck on September 27, 2026.

---

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