# Suntain vs 3DARVI Light

The clearest difference is update cadence: 3DARVI Light at every 6 weeks against Suntain's every 4 months. Suntain's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Suntain ships an update every 4 months, 3DARVI Light every 6 weeks. The most recent releases landed on October 19, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Suntain | 3DARVI Light |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 54 MB | 302 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jacques DUMAREST](https://appshunter.io/developer/1748816172) | [MTI Ltd.](https://appshunter.io/developer/365850673) |

## What reviewers say

### Suntain

[App page](https://appshunter.io/ios/app/suntain/id6737068522)

Visualize the sun's position and trajectory based on your location and date. Get sunrise and sunset times, including when the sun appears or disappears behind terrain. Access annual data on daylight and sunshine duration.

**Highlights:** Sun position and trajectory visualization, Horizon sunrise and sunset times, Sunrise/sunset behind terrain, Annual sunrise/sunset data, Daylight and sunshine duration, Sunshine duration analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### 3DARVI Light

[App page](https://appshunter.io/ios/app/3darvi-light/id6738384601)

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

**In-app purchases:** none


## Frequently asked questions

### Is Suntain free?

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

### Is 3DARVI Light free?

3DARVI Light is free to download, with no in-app purchases.

### Do Suntain or 3DARVI Light have ads?

Neither Suntain nor 3DARVI Light shows ads.

### Which is updated more often, Suntain or 3DARVI Light?

Suntain ships an update every 4 months, and 3DARVI Light every 6 weeks. Most recently, Suntain was updated on October 19, 2026 and 3DARVI Light on October 11, 2026.

---

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