Comparison

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.

Head to head
About

SunTrace

Features
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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

About

熱中症アラート(暑さ指数予測)

Features
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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

SunTrace4 screens
熱中症アラート(暑さ指数予測)4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 4 level
SunTrace versus 熱中症アラート(暑さ指数予測): the parameters behind the verdict, then further details
ParameterSunTrace熱中症アラート(暑さ指数予測)
PriceFreeFree
Update frequencyWeeklyWeekly
AdsYesNo — better
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size67 MB25 MB
Age rating4+4+
Developermint-softRoku, K.K.

In-app purchases

1 purchases

SunTrace

One-time1
  • SunTrace Pro$1.99
None

熱中症アラート(暑さ指数予測)

No in-app purchases

Questions

Is SunTrace free?
SunTrace is free to download, with in-app purchases available.
Is 熱中症アラート(暑さ指数予測) free?
熱中症アラート(暑さ指数予測) is free to download, with no in-app purchases.
Do SunTrace or 熱中症アラート(暑さ指数予測) have ads?
SunTrace shows ads; 熱中症アラート(暑さ指数予測) does not.
Which is updated more often, SunTrace or 熱中症アラート(暑さ指数予測)?
SunTrace ships an update weekly, and 熱中症アラート(暑さ指数予測) weekly. Most recently, SunTrace was updated on November 5, 2026 and 熱中症アラート(暑さ指数予測) on October 31, 2026.

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