Comparison

Epicentral vs GPT Solar System Explorer

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

Head to head
About

Epicentral

Explore global earthquake patterns with real-time data and historical context. View recent seismic events on interactive maps and lists, with detailed summaries and links to official information. Understand current activity within the framework of historical seismicity.

Highlights
  • Real-time earthquake lists
  • Interactive earthquake maps
  • Daily, weekly, and monthly data views
  • Event summaries and details
  • Links to USGS earthquake information
  • Historical earthquake catalogs
Features
Read full description

Epicentral is a network-based educational application that displays lists and maps of earthquakes that occurred during the last day, week, or month. This version runs on iPhones, iPads, and Macs (as an iPad App) but requires iOS 26+ and macOS 26+. The data are served by the U.S. Geological Survey or the European-Mediterranean Seismological Centre (and three other seismological organizations). List updates take at most a few 10s of seconds. For each event, a summary of the event’s properties and relationship to nearby recent seismicity is presented. When using the USGS feeds, a link to the event-specific USGS earthquake information page is available. Several historical earthquake catalogs (sourced from the US Geological Survey) are included to provide context for more recent earthquakes. These catalogs can be used to put more recent activity in context.

About

GPT Solar System Explorer

Explore our Solar System in an interactive 3D environment powered by AI. Discover stunning images and videos from space agencies, and ask your AI guide anything about the cosmos. Perfect for curious minds of all ages.

Highlights
  • Interactive 3D Solar System model
  • AI-powered cosmic guide
  • NASA, SpaceX, ESA imagery & videos
  • Planet and mission details
  • Voice-activated Q&A
  • Intuitive controls for all ages
Features
Read full description

Get ready for an out-of-this-world experience. This interactive 3D space app, powered by advanced AI, brings the wonders of our Solar System to life. Discover breathtaking images and videos from NASA, SpaceX, Roscosmos, the Chinese Space Agency, ESA, and more. Fly from planet to planet, explore the Moon and Sun, and get up close with stunning space photography and footage. The intuitive controls make space exploration easy for both kids and adults. Touch down on any planet and choose from the menu:  - About the Planet – Learn about its structure, atmosphere, and unique features.  - Photos & Videos – Browse exclusive images of spacecraft, planetary landscapes, and historic space missions. - Missions – Discover lunar and Mars rovers, deep-space probes, and Elon Musk’s vision for colonizing Mars using Starships and more Meet your cosmic AI space guide. Curious about black holes? Wondering how astronauts live in space? Just tap the mic button in the lower-right corner and ask anything. Your AI guide holds vast knowledge of the cosmos and adapts to your preferred style, whether you want a simple explanation or a deep scientific breakdown. Download now and embark on a space journey with your AI companion! *** This app offers auto-renewable subscriptions for one month and one year. Your subscription renews automatically 24 hours before the current period ends. You can cancel anytime in your device settings. For details, please review our Privacy Policy: https://kidify.games/privacy-policy/ and Terms of Use: https://kidify.games/terms-of-use/

Screenshots

Epicentral4 screens
GPT Solar System Explorer4 screens

Verdict

The call

The clearest difference is review sentiment: Epicentral at 75% against GPT Solar System Explorer's 0%. Epicentral also leads on in-app purchases (none vs 5). GPT Solar System Explorer's advantage is price (Free vs $0.99) and update cadence (every 2 weeks vs monthly). On ads 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

CostPrice · In-app purchases · Ads · Monetization

GPT Solar System Explorer is free to download; Epicentral costs $0.99 up front. GPT Solar System Explorer sells 5 in-app purchases, starting at $5.99 per month. Epicentral asks for nothing beyond the download.

UpkeepUpdate frequency

Epicentral ships an update monthly, GPT Solar System Explorer every 2 weeks. The most recent releases landed on October 31, 2026 and November 4, 2026 respectively.

Scorecard6 real differences · 4 level
Epicentral versus GPT Solar System Explorer: the parameters behind the verdict, then further details
ParameterEpicentralGPT Solar System Explorer
Price$0.99Free — better
Rating—4.7 (96 ratings) — better
Positive reviews75.3% of reviews — better0.0% of reviews
Number of ratings—96 — better
Update frequencyMonthlyEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.015.0 — better
Further details — not scored
Size16 MB288 MB
Age rating4+4+
DeveloperCharles AmmonApic Ways

Customer experience

Epicentral

Written reviews73 reviews
Positive75.3%
Neutral6.8%
Negative17.8%

GPT Solar System Explorer

All ratings90 ratings
Positive92.2%
Neutral1.1%
Negative6.7%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

Epicentral

No in-app purchases

5 purchases

GPT Solar System Explorer

Subscriptions4
  • Monthly Pro Subscription$5.991 Month
  • Monthly Super Pro Subscription$19.991 Month
  • Monthly Ultra Pro Subscription$29.991 Month
Show 1 more
  • Yearly Pro Subscription$39.991 Year
One-time1
  • AI coins$5.99

Questions

Is Epicentral free?
Epicentral costs $0.99, with no in-app purchases.
Is GPT Solar System Explorer free?
GPT Solar System Explorer is free to download, with in-app purchases available.
Do Epicentral or GPT Solar System Explorer have ads?
Neither Epicentral nor GPT Solar System Explorer shows ads.
Which is updated more often, Epicentral or GPT Solar System Explorer?
Epicentral ships an update monthly, and GPT Solar System Explorer every 2 weeks. Most recently, Epicentral was updated on October 31, 2026 and GPT Solar System Explorer on November 4, 2026.

Other comparisons