Pros
- Strong integration with Google apps
- Free with no in-app purchases or ads
- 1 billion-plus installs and regular updates
Google Gemini vs ChatGPT vs Grok AI: which AI assistant should you choose?
Choose Gemini for Google app integration, ChatGPT for a highly rated all-round assistant, or Grok for answers connected to real-time data from X.
At a glance
Google GeminiGoogle LLCGoogle Play4.6 out of 5
PriceFree
In-app purchasesNo
PlatformsAndroidiPhone
Age ratingTeen
ChatGPTOpenAIGoogle Play4.8 out of 5
PriceFree
In-app purchasesYes ($8.00 - $500.00 per item)
PlatformsAndroidiPhone
Age ratingTeen
Grok AIxAIGoogle Play4.8 out of 5
PriceFree
In-app purchasesYes ($4.99 - $299.99 per item)
PlatformsAndroidiPhone
Age ratingTeen
Ratings, prices and age ratings come from the Google Play listings, read on Nov 7, 2026. Listings change over time.
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How we compared them
Google Gemini, ChatGPT, and Grok AI are free-to-download productivity apps built around conversational AI. All can help with questions and creative work, while their store summaries also point to writing and image generation as uses.
Their clearest differences are ecosystem, positioning, and paid options: Gemini connects with Google apps, ChatGPT offers a broad assistant and creative toolkit, and Grok emphasizes real-time data from X. This comparison covers their Google Play figures, strengths, trade-offs, and the kind of user each suits.
How we compared them
We compared the Google Play ratings, install ranges, prices, ad status, and in-app purchase ranges for all three apps, along with their store summaries and descriptions. The figures were read on November 7, 2026; ratings and install counts can change over time.
We also considered the strengths and weaknesses identified for each app. Google Play declares that ChatGPT shares device or other IDs and collects app interactions, user-generated content, crash logs, diagnostics, performance data, and several types of contact and message information. It says data is encrypted in transit and users can request deletion. No equivalent data-safety declaration is included here for Gemini or Grok, so we make no comparison of their data practices.
Google Gemini
by Google LLC
4.6 out of 5 on Google Play
Best for: people who work across Google apps
Gemini is the clearest fit for people already using Google services: its noted integration with other Google apps gives it an ecosystem advantage over ChatGPT and Grok. It also emphasizes writing, planning, learning, and creative work, and Google Play shows 1 billion-plus installs.
The trade-off is that Gemini can feel complex to new users, and its noted limitations include restricted offline access and occasional sync issues. It is free with no in-app purchases or ads, but may use substantial data and some features are paid.
- Price
- Free
- Platforms
- Android, iOS
- Age rating
- Teen
Cons
- Limited offline access and occasional sync issues
- Can be complex for new users and data-intensive
ChatGPT
by OpenAI
4.8 out of 5 on Google Play
Best for: people seeking a versatile general-purpose AI assistant
ChatGPT is the most broadly positioned of the three for writing, search, image generation, questions, and creative suggestions. Its 4.8 Google Play rating comes from 66,117,409 ratings, giving it the highest rating and largest rating count among these apps.
Its weaknesses include the possibility of incorrect or irrelevant answers, limited nuance, and reliance on internet access for full functionality. Google Play also reports in-app purchases from $8.00 to $500.00 per item, ads, and collection and sharing of several categories of data; it says data is encrypted in transit and deletion can be requested.
- Price
- Free
- Platforms
- Android, iOS
- Age rating
- Teen
Pros
- Highest rating here: 4.8 from 66,117,409 ratings
- Covers writing, search, image generation, and questions
- Free to download
Cons
- In-app purchases and ads
- Google Play reports sharing IDs and collecting multiple data types
Grok AI
by xAI
4.8 out of 5 on Google Play
Best for: people who want AI answers informed by X
Grok's defining distinction is access to real-time data from X, which can make it a relevant choice for users looking for current information. Its store summary also highlights image generation, and its 4.8 rating matches ChatGPT's.
Grok has fewer installs than Gemini and ChatGPT, at 100 million-plus, and its free version has limited features. In-app purchases range from $4.99 to $299.99 per item. The noted trade-offs include a constant internet requirement, potential privacy concerns, and possible lag on older devices.
- Price
- Free
- Platforms
- Android, iOS
- Age rating
- Teen
Pros
- Real-time data from X
- Image generation is highlighted in its store summary
- 4.8 Google Play rating
Cons
- Free version has limited features and paid purchases
- Requires internet; may lag on older devices
Which one should you pick?
Google Gemini
Best for Google app integration
ChatGPT
Best all-round AI assistant
Grok AI
Best for real-time information from X
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FAQ
Which app has the highest Google Play rating?
ChatGPT and Grok AI are tied at 4.8. Gemini has a 4.6 rating.
Which app is best for people who use Google services?
Google Gemini is the clearest choice because it integrates with other Google apps.
Which app offers real-time data from X?
Grok AI highlights real-time data from X in its Google Play summary.
Which of these apps includes ads or in-app purchases?
ChatGPT and Grok AI have in-app purchases; ChatGPT is also marked as containing ads. Gemini is marked as having neither.
Mobexer compares apps independently. We don't make, own or distribute any of these apps and have no affiliation with their developers, Google or Apple. Names, icons and trademarks belong to their owners; store details and prices are shown for reference and can change.