# lustar vs UV

The clearest difference is ads: lustar at none against UV's shown. UV's advantage is update cadence (every 2 weeks vs every 96 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

lustar ships an update every 96 months, UV every 2 weeks. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | lustar | UV |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (9 ratings)](https://appshunter.io/ios/app/lustar/id1327570819/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 96 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 191 MB | 36 MB |
| Requires iOS | **16.0** | 16.7.10 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [THIRSTY FISH LLC](https://appshunter.io/developer/962673258) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### lustar

[App page](https://appshunter.io/ios/app/lustar/id1327570819)

This app provides hourly stargazing forecasts by combining local weather predictions with light pollution data. It features a searchable global map to help users find optimal viewing locations.

**Highlights:** Hourly stargazing forecasts, Light pollution data integration, Searchable world map, Local weather forecasts, Optimal viewing location finder

**Features:** macOS Compatibility

**In-app purchases:** none


### UV

[App page](https://appshunter.io/ios/app/uv-index-forecast/id6503669685)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is lustar free?

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

### Is UV free?

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

### Do lustar or UV have ads?

UV shows ads; lustar does not.

### Which is updated more often, lustar or UV?

lustar ships an update every 96 months, and UV every 2 weeks. Most recently, lustar was updated on November 2, 2026 and UV on November 4, 2026.

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