iStellar vs 日の出・日の入時刻
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iStellar
Explore the cosmos with a realistic planetarium experience. View the night sky from any location and time, with detailed celestial bodies and dynamic simulations. Intuitive multi-touch controls make navigation effortless.
- Real-time starry sky simulation
- Adjustable location and time
- Detailed celestial object data
- Intuitive multi-touch controls
- Solar eclipse simulation
- Object search function
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iStellar is a planetarium App that shows the starry sky seen from the place and time of your choice. It is optimized for Multi-Touch control, allowing you to operate intuitively; drag to move the star chart, pinch to zoom in and out, and so on. The star chart can be rotated from portrait to landscape, and you can even fix the location via GPS (only for iPhone 3G). FEATURES - Over 16,000 star data, with name for 254 stars - Twinkles like actual stars - Simulates distortion (atmospheric refraction and extinction) at low altitude - Displays the Sun, daylight, twilight, the Moon (with shape and phase), 8 planets, Pluto - Shows name, line and picture for all constellations - Milky Way with real tone - Plots Messier objects and their names - Comets with accurate position and magnitude. Data can be downloaded whenever available - Meteor Shower Radiants - Solar eclipse simulation with high accuracy - Adjustable moonlight and light polution - Landscape and azimuth / direction grid - Beautiful animation (real-time, adjusted time, reversal) - Simulates every second between 1 Jan 1900 to 31 Dec 2099 - Switches screen according to the device's orientation - Zoom by pinching(3 to 180 degrees) - Easy moving through the sky by dragging, and centering by double-tap - Object Search function - Free choice of location and time zone, instant setting with GPS
日の出・日の入時刻
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日の出・日の入時刻を計算する iPhone/iPad 向けアプリです。 日付(今日/明日/日付選択)と場所(現在地/設定された地点)を選択することが可能です。フリックして、指定した日付の前後３日間の時刻が表示できます。
Screenshots
Verdict
The clearest difference is price: 日の出・日の入時刻 at Free against iStellar's $3.99. iStellar's advantage is review sentiment (49% vs 37%) and iOS requirement (12.4 vs 15.6). On update cadence, ads, in-app purchases and device support 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
日の出・日の入時刻 is free to download; iStellar costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
iStellar ships an update every 3 months, 日の出・日の入時刻 every 2 months. The most recent releases landed on October 29, 2026 and October 17, 2026 respectively.
| Parameter | iStellar | 日の出・日の入時刻 |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 49.3% of reviews — better | 36.8% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.4 — better | 15.6 |
| Further details — not scored | ||
| Size | 37 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | AstroArts Inc. | Mets R&D Center |
Customer experience
iStellar
日の出・日の入時刻
In-app purchases
iStellar
No in-app purchases
日の出・日の入時刻
No in-app purchases
