# Stargazing Forecast & Planner

> Clear sky, moon: go tonight?

Canonical page: [https://chrome-stats.com/d/id6780720844](https://chrome-stats.com/d/id6780720844)

## Overview

- **ID:** `id6780720844`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Netflowers Inc.
- **Category:** Weather
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 2.1
- **Last updated:** 2026-09-16
- **First published:** 2026-06-19
- **Size:** 57 MB
- **Data as of:** 2026-09-23
- **Store listing:** [Apple App Store](https://apps.apple.com/jp/app/stargazing-forecast-planner/id6780720844?l=en-US)
- **Website:** [https://www.netflowers.co.jp/ios/stargo/](https://www.netflowers.co.jp/ios/stargo/)
- **Privacy policy:** [https://www.netflowers.co.jp/ios/stargo/privacy.html](https://www.netflowers.co.jp/ios/stargo/privacy.html)

## Description

One score for tonight's sky: clouds, humidity, wind, moon, twilight. Messier windows, meteor shower alerts, widgets. One-time Premium unlock. No ads.

Cloud, humidity, wind, moonlight and twilight, distilled into one number. Star Index tells you whether tonight is a go for stargazing, 0 to 100, before you drive anywhere.

STAR INDEX (0-100)
Cloud cover is broken down by altitude layer and combined with humidity, wind speed, moon phase and twilight timing. Hourly and 7-day outlooks let you plan ahead. Seeing (atmospheric steadiness) and transparency are scored separately, so you can tell whether tonight favors planets or faint deep-sky targets.

DEEP-SKY CATALOG
All 110 Messier objects plus major NGC targets, each with its best viewing window worked out from twilight end and moonrise/moonset for your location. Planet and moon rise/set times, direction and altitude at a glance.

NEVER MISS A SHOWER
Get a viewing-conditions score for 8 major meteor showers (Quadrantids, Perseids, Geminids and more), with a push notification as the peak approaches. Eclipses and planetary oppositions are on a built-in calendar.

WIDGETS
Home screen and Lock Screen widgets keep tonight's Star Index visible without opening the app.

ON-DEVICE AI (supported devices)
On iOS 26 devices with on-device intelligence, Star Index writes a plain-language read of tonight's conditions. Unsupported devices fall back to a rule-based summary automatically.

PRIVATE
Location is used only to forecast your local sky. No account, no data collection, no ads.

PREMIUM (one-time purchase, not a subscription)
Unlock multiple saved locations, the full Messier catalog, photography windows and the 7-day outlook with a single purchase.

Stop guessing from a generic weather app. Star Index tells you if tonight is worth the drive.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Rankings

- #806,201 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6780720844)