# Sunbathe vs Grateful10

The clearest difference is in-app purchases: Grateful10 at none against Sunbathe's 1. Grateful10 also leads on update cadence (every 2 days vs every 3 weeks). Sunbathe's advantage is iOS requirement (15.1 vs 26.2). 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. Grateful10 asks for nothing beyond the download.

Sunbathe ships an update every 3 weeks, Grateful10 every 2 days. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Sunbathe | Grateful10 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 43 MB | 4 MB |
| Requires iOS | **15.1** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Julia Alvarez de Eulate Sainz](https://appshunter.io/developer/1662471073) | [Nerd Valley AS](https://appshunter.io/developer/1870039341) |

## 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 |


### Grateful10

[App page](https://appshunter.io/ios/app/grateful10/id6757974522)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sunbathe free?

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

### Is Grateful10 free?

Grateful10 is free to download, with no in-app purchases.

### Do Sunbathe or Grateful10 have ads?

Neither Sunbathe nor Grateful10 shows ads.

### Which is updated more often, Sunbathe or Grateful10?

Sunbathe ships an update every 3 weeks, and Grateful10 every 2 days. Most recently, Sunbathe was updated on October 24, 2026 and Grateful10 on October 12, 2026.

---

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