Comparison

TrackISS vs GemTavern

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

Head to head
About

TrackISS

Follow the International Space Station's journey across the globe in real-time. Explore its projected orbit, view live telemetry data, and browse a gallery of NASA images. Discover who is currently in space and learn about their missions.

Highlights
  • Real-time ISS movement tracking
  • Projected orbit path display
  • Live telemetry data (velocity, lat, long, altitude)
  • NASA image gallery with zoom
  • View current astronauts and biographies
  • Customizable interface settings
Features
Read full description

Welcome to TrackISS, a beautiful native experience that tracks the International Space Station in real-time. Main features include: - See the real-time movement of the ISS. - Track with two different map types. - View the projected orbit path of the ISS. - View live data from the ISS, such as velocity, latitude, longitude, and altitude. - Search for ISS images from NASA's public image database. - View search results in a beautiful gallery-like view, that supports zooming in/out. - View images and their descriptions in an efficient image viewer. - Export any image with ease. - View all current humans in space, along with their nationality, mission role, and a link to their biography (in-app). - Adjust defaults such as map annotations size, toggle haptics, reduce animations, etc. - Select alternate app icons. This app was designed with a hybrid of custom and native iOS components, to provide a space-themed experience while still maintaining the iOS feel we all know and love. Enjoy! New features and improvements coming soon. Feel free to reach out on Twitter with feature requests or feedback :)

About

GemTavern

Engage in offline AI-powered roleplay and voice conversations with custom characters. Create immersive stories, manage lore, and enjoy hands-free chats with local AI models. Your data and creations stay under your control.

Highlights
  • Offline AI roleplay
  • Voice conversations
  • Character card import
  • Local AI model generation
  • World book and lore management
  • Hands-free voice calls
  • Local chat saving and export
Features
Read full description

GemTavern brings character-based AI chat to iOS, with local AI chat, optional GemTavern Cloud, voice calls, character cards, and Game Link support for connected storytelling. Create immersive character chats, multi-character scenes, world books, lore-rich stories, and voiced conversations. Import compatible character cards, manage personas and voices, and choose whether to chat with a downloaded local model or GemTavern Cloud. Key features: - Create AI character chats and story sessions. - Choose between Local Gemma and GemTavern Cloud as your chat model. - Use GemTavern Cloud for higher-quality cloud chat when signed in. - Manage your account, plan, purchases, message balance, and usage history in Account Center. - Import character cards from PNG, JSON, CharX, or supported URLs. - Use built-in preset characters or import compatible character cards. - Manage personas, avatars, world books, and lore entries. - Use longer character context for richer chat and more detailed scenes. - Switch chat language across supported languages. - Use character narration with built-in voice settings. - Choose from Supertonic 3 preset voices for high-quality local narration. - Bind different voices to different characters. - Start voice calls with characters for hands-free conversation. - Optionally enable camera awareness during voice calls so characters can respond with fresh visual context when you speak. - Use Game Link to pair supported games with GemTavern. - Scan a Game Link QR code to receive character cards, start paired chats, and reconnect previous sessions. - Let supported game events and context flow into character conversations. - Save chats locally and export chat history. GemTavern is designed for fictional storytelling, creative writing, and character-based chat. Local model chats are designed to run on device after setup. GemTavern Cloud, account features, purchases, and Game Link require network access. User-created or imported content remains under the user's control. AI-generated replies may be inaccurate or unexpected, so users should review outputs and avoid relying on the app for professional advice. Terms of Use: https://ai-app-dev.com/gemtavern/terms Privacy Policy: https://ai-app-dev.com/gemtavern/privacy-policy

Screenshots

TrackISS4 screens
GemTavern4 screens

Verdict

The call

The clearest difference is rating: TrackISS at 5.0 against GemTavern's 4.4. TrackISS also leads on review sentiment (100% vs 67%) and monetization model (free vs free with in-app purchases). On price, ratings volume, ads and in-app purchases 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. TrackISS sells 1 one-off in-app purchase and GemTavern sells 5 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

TrackISS holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 11 and 5 respectively. Written reviews point the same way: 100% of TrackISS's written reviews are positive against 67% of GemTavern's.

Scorecard4 real differences · 6 level
TrackISS versus GemTavern: the parameters behind the verdict, then further details
ParameterTrackISSGemTavern
PriceFreeFree
Rating5.0 (11 ratings) — better4.4 (5 ratings)
Positive reviews100.0% of reviews — better66.7% of reviews
Number of ratings11 — better5
Update frequency—Every 6 days
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS14.0 — better18.0
Further details — not scored
Size90 MB224 MB
Age rating4+4+
DeveloperSamuel McGarryAI-APP-DEV LLC

Customer experience

TrackISS

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

GemTavern

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

1 purchases

TrackISS

One-time1
  • Launchpad Tip$1.99
5 purchases

GemTavern

Subscriptions1
  • GemTavern Cloud Plus$9.991 Month
One-time4
  • 1,000 Messages$1.99
  • Remove Ads Forever$4.99
  • 5,000 Messages$7.99
Show 1 more
  • 10,000 Messages$14.99

Questions

Is TrackISS free?
TrackISS is free to download, with in-app purchases available.
Is GemTavern free?
GemTavern is free to download, with in-app purchases available.
Which has better reviews, TrackISS or GemTavern?
TrackISS is rated higher. TrackISS averages 5.0 out of 5 from 11 ratings, while GemTavern averages 4.4 from 5 ratings.
Do TrackISS or GemTavern have ads?
Neither TrackISS nor GemTavern shows ads.

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