Comparison

EPIC vs Ishigaki Star Guide

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

EPIC

Discover stunning daily images from NASA, including the Astronomy Picture of the Day, Mars rover photos, and views from Hubble and James Webb. Explore curated collections, search the NASA Image Library, and save your favorite space discoveries. Watch live NASA streams and engage with STEM activities for all ages.

Highlights
  • Daily Astronomy Picture of the Day
  • Mars rover and Earth views
  • Hubble and James Webb images
  • Themed NASA mission collections
  • Searchable NASA Image Library
  • Save favorite images
  • NASA live stream
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EPIC – NASA Explorer Explore the universe with NASA — every day. EPIC brings together the best public NASA media in one app: the daily Astronomy Picture of the Day, Mars rover photos, Hubble and James Webb images, Earth views from space, and curated NASA video collections. Browse, search, save favorites, and dive deeper into the missions that inspire us. TODAY Start each day with NASA’s Astronomy Picture of the Day — stunning images with clear explanations. EXPLORE Browse themed collections: Mars rovers, Apollo, Artemis, Hubble, James Webb, eclipses, launches, and more. Young Explorers adds NASA videos and STEM activities for curious minds of all ages. SEARCH Search the NASA Image Library and discover photos and videos across decades of space exploration. FAVORITES Save images you love and build your own space archive. NASA LIVE Watch NASA’s live stream when available. Built for iPhone, iPad, Mac, and Apple Vision Pro — one app for daily inspiration and deep exploration.

About

Ishigaki Star Guide

Features
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Hold your phone up to the night sky and the stars in front of you appear on screen, named. A star guide built for one sky: Ishigaki Island, Okinawa. Ishigaki sits at 24.6 degrees north. From here the Southern Cross clears the horizon from winter dawns to spring evenings, a sight never seen from mainland Japan. POINT AND FIND AR mode draws constellation lines and star names over the live camera view, so the screen matches the sky above you; with the camera off it works as a plain chart. Only the constellation at the centre of your view lights up, the others fade back. 5,070 stars down to magnitude 6.0, the naked-eye limit, with lines for all 88 constellations. THE SOUTHERN CROSS, WITH TIMES Search for the Southern Cross: if it is up, an arrow at the edge of the screen guides you as you turn towards it; if not, the time machine jumps to the next time it will be. Check tonight's sky before you go outside. STAR NAMES FROM THE YAEYAMA ISLANDS Antares is Beecha-bushi. The Pleiades are Muri-ga-bushi. Polaris is Ninufa-bushi. The Milky Way is Tingara. Tap a star to see the Yaeyama name beside the modern one, with the story attached. Search "Haimuru-bushi" and the Southern Cross comes up. FIND THE CONSTELLATIONS AND COLLECT THEM Follow the arrow until the constellation is in front of you, hold it there, and tap "Found it" to record it in your book. A guide character then talks about that constellation and suggests a nearby one you have not found yet, arrow ready. Eighty-one constellations are reachable from Ishigaki; the ones that barely clear the horizon, like the Southern Cross at 8 degrees, rank as legendary. Records only count at night at the real current time, so the book holds only what you actually looked at. GUIDED PROGRAMMES, SPOKEN Like a planetarium show, a guided programme walks you through the sky one constellation at a time. "Yaeyama Winter Sky: An Introduction" is free: on nights from December to February it takes you from Orion to the Pleiades, the Winter Triangle and Canopus low over the sea, narrated in the unhurried voice of an island elder, so you can keep looking up. Every description card can also be read aloud. More themed programmes will follow. WILL IT BE CLEAR TONIGHT? - Sky Score: cloud, moonlight, humidity, visibility, rain and pressure scored out of 100, with the best hour highlighted (needs a connection) - Tonight's Highlights: end of twilight, moonrise and moonset, the moonless dark window, the Southern Cross transit, active showers - Moon Calendar: a month of phases at a glance FINDING DARK SKY Thirty observing spots around Ishigaki and the Yaeyama Islands, each with a Bortle darkness rating and distance from you, with town lights drawn on the map. Tap one for directions. ALSO INCLUDED - Time machine: step by second to year, or play time forward and watch the sky turn - Deep sky: 19 objects including Omega Centauri, Andromeda and the Orion Nebula - A Milky Way drawn from measured isophote data, Sagittarius bulge and Great Rift included - Meteors from the active shower's radiant at a realistic rate - Sound effects and a gentle haptic tap when you find a constellation - Five languages: Japanese, English, Chinese (Traditional and Simplified), Korean MADE BY A STARGAZING GUIDE OF TEN YEARS Hoshihaku, Inc. has run the Nagareboshi-no-oka stargazing tour on Ishigaki for ten years and guided over 60,000 visitors. The explanations are the answers we give guests in the field. PRIVACY - No account, no sign-up, no name or email to enter anywhere - No advertising, no analytics, no tracking - Settings and your collection stay on your device - Coordinates are sent only to fetch the weather forecast, and are not stored - The camera draws the AR background only; nothing is photographed, saved or sent - The microphone is never used Everything but the weather-based Sky Score works offline, guided programmes included. Bearings come from the magnetometer, which reads inaccurately inside a vehicle or near steel.

Screenshots

EPIC4 screens
Ishigaki Star Guide4 screens

Verdict

The call

The clearest difference is in-app purchases: Ishigaki Star Guide at none against EPIC's 1. Ishigaki Star Guide also leads on iOS requirement (15.1 vs 26.0). EPIC's advantage is device support (4 vs 2). On price and ads 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. EPIC sells 1 one-off in-app purchase. Ishigaki Star Guide asks for nothing beyond the download.

Scorecard3 real differences · 6 level
EPIC versus Ishigaki Star Guide: the parameters behind the verdict, then further details
ParameterEPICIshigaki Star Guide
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyMonthly—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Mac, Vision Pro — betteriPhone, iPod
Requires iOS26.015.1 — better
Further details — not scored
Size10 MB32 MB
Age rating4+4+
DeveloperWilliam Keenenobunari arakaki

In-app purchases

1 purchases

EPIC

One-time1
  • Lifetime Unlock$4.99
None

Ishigaki Star Guide

No in-app purchases

Questions

Is EPIC free?
EPIC is free to download, with in-app purchases available.
Is Ishigaki Star Guide free?
Ishigaki Star Guide is free to download, with no in-app purchases.
Do EPIC or Ishigaki Star Guide have ads?
Neither EPIC nor Ishigaki Star Guide shows ads.

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