SunTrace vs 熱中症アラート(暑さ指数予測)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SunTrace
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SunTrace visualizes the sun and moon's journey across the sky in a beautiful, minimalist chart — right on your home screen. NEW IN 1.3 • Tonight Score – tonight's stargazing score from 0 to 100, with the best 2-hour window and the reasons behind it (7-night outlook with Pro) • Milky Way planner – when the galactic core is visible tonight and this month, plus a Milky Way band on the sky map and in AR (full-year heatmap with Pro) • Real terrain – the sky map and AR draw the actual ridge line around you: "Hidden behind the ridge, clears at 10:10 PM" • Star-hop guide – step by step from bright stars to the constellation you want • Constellation photo – in camera AR, show just one constellation's lines and name, take the photo, align it, then save or share. Free photos carry a small SunTrace watermark; Pro removes it. Phone cameras mostly capture the brighter stars. WHAT YOU GET ◉ Sky Map & Constellation Finder See 5,000 stars, all 88 constellations, the planets, the Sun and the Moon where they are right now. Search a constellation and follow the arrow — it lights up in gold. Point your phone or turn on the camera to see the sky labeled in AR, and check when a constellation rises and its best time tonight. ◉ Sun & Moon Path Chart Track the sun's arc from sunrise to sunset and the moon's path during nighttime — all on a single 24-hour timeline. See the current position in real-time. ◉ Temperature Chart Hourly temperature curve with cold-to-hot color gradient. Precipitation probability overlay shows when rain is expected. ◉ Golden Hour & Blue Hour Know exactly when the perfect light begins. Color-coded light phase bar shows golden hour, blue hour, and twilight times at a glance. ◉ Home Screen Widgets Small and Medium widgets show sunrise, sunset, temperature, and a countdown to the next event — without opening the app. Chart and Calendar widgets come with Pro. ◉ Date Explorer Browse any past or future date to see the sun path, moon phase, and historical weather data powered by Open-Meteo. ◉ Sun Compass Point your phone to see where the sun is right now. The compass overlays the sun's arc with azimuth and altitude — perfect for planning photo shoots. ◉ Share Cards Generate beautiful Instagram-ready cards showing today's sun path, golden hour times, and moon phase. Share your light with the world. SUNTRACE PRO (one-time purchase · yours forever) • Multiple cities (up to 5) • Smart alerts (golden hour, sunrise, sunset push notifications) • Premium widgets (Chart & Calendar) • 4 widget themes (Dark, Light, Sunset, Ocean) • Browse any past or future date (free: ±3 days) • Full 7-day sky quality forecast • 30-day moon calendar • Seasonal horizon view • Unlimited sun & moon alignment searches • No ads PERFECT FOR Photographers chasing golden hour Runners & outdoor enthusiasts Anyone who loves tracking daylight Astronomy & moon phase enthusiasts No account required. SunTrace Pro is a one-time purchase: pay once and keep every Pro feature forever. No subscription and no recurring charges. Payment is charged to your Apple ID account at confirmation of purchase. On a new device or after reinstalling, tap Restore Purchases on the Pro screen. Terms of Use: https://suntrace.mint-soft.com/terms Privacy Policy: https://suntrace.mint-soft.com/privacy
熱中症アラート(暑さ指数予測)
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危険な暑さが来る前に、先回りで備える。 「熱中症アラート(暑さ指数予測)」は、全国どこでも暑さ指数(WBGT)を 最大7日先まで1時間ごとに確認できる、熱中症対策の予報アプリです。 ■ 会員登録なしで、すぐ使える ・全国の危険度が一目でわかる「危険度マップ」 ・住所を入力して、その地点の暑さ指数を確認 ・主要都市の今日の暑さ指数をまとめて表示 ■ 見やすい時間別予報 ・暑さ指数を「気温」「天気」と一緒にグラフで表示 ・1時間ごと・7日先までまとめてチェック ・通常/警戒/厳重警戒/作業中止を、色と絵文字で直感的に ■ お気に入り&事前通知(無料) ・よく見る地点をお気に入り登録して、ホームにすぐ表示 ・お気に入り地点が危険な暑さに達する約3時間前に、プッシュ通知でお知らせ ■ 暑さ指数(WBGT)とは 気温・湿度・輻射熱から算出される、熱中症予防の国際的な指標です。 同じ気温でも湿度が高いほど危険度は上がります。環境省の基準に沿って、 日常や屋外作業の目安をわかりやすく表示します。 ■ 現場の熱中症対策にも(法人向けログイン) ・自社の現場を登録すると、毎日自動更新の7日間予測やアラート通知を利用できます ※ アカウントは契約企業向けに発行されます。アプリ内での購入はありません。 ■ 出典・ご注意 観測地点:環境省 熱中症予防情報サイト 予測は参考情報です。安全判断は必ず実測と併せて行ってください。
Screenshots
Verdict
The clearest difference is in-app purchases: 熱中症アラート(暑さ指数予測) at none against SunTrace's 1. 熱中症アラート(暑さ指数予測) also leads on ads (none vs shown). On price, update cadence, 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. SunTrace sells 1 one-off in-app purchase. 熱中症アラート(暑さ指数予測) asks for nothing beyond the download.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | SunTrace | 熱中症アラート(暑さ指数予測) |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Weekly |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 67 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | mint-soft | Roku, K.K. |
In-app purchases
SunTrace
- SunTrace Pro$1.99
熱中症アラート(暑さ指数予測)
No in-app purchases









