lustar vs UV
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
lustar
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.
- Hourly stargazing forecasts
- Light pollution data integration
- Searchable world map
- Local weather forecasts
- Optimal viewing location finder
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The two biggest factors keeping you from finding that perfect star gazing location are light pollution and weather. Using local weather forecasts and light pollution data, Lustar gives you a searchable map of the world with hourly stargazing forecasts for every location. Check out the Dark Site locations if you're not sure where to start.
UV
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UV index forecast information
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | lustar | UV |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (9 ratings) — better | — |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 96 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 16.0 — better | 16.7.10 |
| Further details — not scored | ||
| Size | 191 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | THIRSTY FISH LLC | Hideaki Uchikoshi |
In-app purchases
lustar
No in-app purchases
UV
No in-app purchases
