# TgForce 3D vs RayDay

The clearest difference is in-app purchases: TgForce 3D at none against RayDay's 3. TgForce 3D also leads on iOS requirement (11.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. RayDay sells 3 in-app purchases, starting at $4.99 per 7 days. TgForce 3D asks for nothing beyond the download.

TgForce 3D ships an update monthly, RayDay every 3 weeks. The most recent releases landed on October 26, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | TgForce 3D | 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 12 MB | 26 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Systemes Kelsec Inc](https://appshunter.io/developer/943716389) | [Jakub Laszczyk](https://appshunter.io/developer/568719342) |

## What reviewers say

### TgForce 3D

[App page](https://appshunter.io/ios/app/tgforce-3d/id1459330958)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 TgForce 3D free?

TgForce 3D is free to download, with no in-app purchases.

### Is RayDay free?

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

### Do TgForce 3D or RayDay have ads?

Neither TgForce 3D nor RayDay shows ads.

### Which is updated more often, TgForce 3D or RayDay?

TgForce 3D ships an update monthly, and RayDay every 3 weeks. Most recently, TgForce 3D was updated on October 26, 2026 and RayDay on October 31, 2026.

---

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