Nano Banana, the playful nickname for Gemini 2.5 Flash Image, has turned Google’s image model into a breakout hit. Introduced in late August, it has propelled the Gemini app to the top of the AI category on Apple’s App Store, overtaking ChatGPT and becoming the most popular AI-powered image generator and editor on iOS.
What’s driving the surge is a tangible leap in quality and control. The update focuses on consistency: the same person or product can be recreated across new images while swapping backgrounds, outfits, hairstyles, and other details. That kind of reliable identity preservation, paired with stronger prompt adherence, makes it far easier to produce cohesive photo sets for social posts, marketing, product showcases, and digital art.
The momentum shows up in the numbers. Month over month, Gemini’s iOS downloads jumped roughly 45%. Appfigures data indicates the app is tracking toward 13 million App Store downloads for September, up from fewer than 9 million in August. Ranking gains followed the spike. Before this update, Gemini’s best placement was third on the US App Store back on January 28, 2025. After Nano Banana arrived, the app climbed to second on September 8 and captured first place on September 12. In global iOS rankings, Gemini now sits among the top five in 108 countries.
On Android, the picture is more competitive. ChatGPT still holds the top spot in the AI category on Google Play. Even so, the Gemini team says the Nano Banana launch has brought in 23 million first-time users, who have collectively generated more than 500 million images so far, according to Google’s Josh Woodward.
The download base continues to swell. In 2025 alone, the Gemini app has accumulated nearly 104 million downloads. Since its debut in February 2024, it has surpassed 185 million installs across iOS and Android.
Why it matters is clear: creators and brands need fast, consistent image workflows. Being able to keep a subject’s identity intact while changing everything else around it lets users test styles, scenes, and product variations without starting from scratch. That capability—delivered with higher fidelity and more control—appears to be the tipping point that pushed Gemini to the top on iOS.
The next question is whether this momentum can carry over to Android and how rivals will respond. For now, Nano Banana has set a new bar for AI image generation on mobile, and user adoption is following suit.
