# Zenova Space vs RayDay

The clearest difference is update cadence: Zenova Space at every 3 days against RayDay's every 3 weeks. Zenova Space also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Zenova Space sells 5 one-off in-app purchases and RayDay sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Zenova Space ships an update every 3 days, RayDay every 3 weeks. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Zenova Space | RayDay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/rayday-vitamin-d-tracker/id6761286896/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Monetization | — | Freemium |
| Size | 36 MB | 26 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [N3 Artiverse Pty Ltd](https://appshunter.io/developer/1687908760) | [Jakub Laszczyk](https://appshunter.io/developer/568719342) |

## What reviewers say

### Zenova Space

[App page](https://appshunter.io/ios/app/zenova-space/id6740554390)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Zenova Coins | $9.99 | one-time |
| 200 Zenova Coins | $19.99 | one-time |
| 600 Zenova Coins | $59.99 | one-time |
| 1000 Zenova Coins | $99.99 | one-time |
| 2000 Zenova Coins | $199.99 | one-time |


### RayDay

[App page](https://appshunter.io/ios/app/rayday-vitamin-d-tracker/id6761286896)

This app helps you understand your daily window for natural Vitamin D production. It calculates optimal sun exposure times based on your location and skin type, providing forecasts and real-time atmospheric data.

**Highlights:** D-Window Calculator, Live Solar Path animation, 7-Day D-Window Forecast, Skin Type Personalization, Smart Notifications, Real-time Atmospheric Data, Home Screen Widget

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RayDay Weekly | $4.99 | per 7 days |
| RayDay Yearly | $24.99 | per year |
| Early Supporter Yearly | $24.99 | per year |


## Frequently asked questions

### Is Zenova Space free?

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

### Is RayDay free?

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

### Do Zenova Space or RayDay have ads?

Neither Zenova Space nor RayDay shows ads.

### Which is updated more often, Zenova Space or RayDay?

Zenova Space ships an update every 3 days, and RayDay every 3 weeks. Most recently, Zenova Space was updated on October 30, 2026 and RayDay on November 9, 2026.

---

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