ISEKAI ZERO

Contains adsIn-app purchases
4.8
2.69K reviews
10K+
Downloads
Content rating
Mature 17+
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About this app

Step into living simulations where you craft the worlds and characters that come to life around you. Build your own storylines or dive into endless procedurally generated scenarios—from immersive fantasy realms to complex social simulations. Our engine transforms your ideas into reactive narratives, with AI-driven characters that evolve within the worlds you create. Design your own scenarios, roleplay as anyone, and watch your stories unfold in real-time. New simulation tools and character archetypes added regularly—architect infinite virtual worlds where every narrative is uniquely yours!
Updated on
Mar 30, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, Photos and videos and 3 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.8
2.64K reviews
Brandon Pecor
April 6, 2026
Its good and fun and I'm enjoying the Frame academy so far. But it still has problems. The free chat model plans aren't very good considering they don't work for the Frame Academy cause it tells me its too long of a story to use it, so please fix it to where we can use it for long stories. It won't play adds to let me get free crystals so that needs to be fixed. For the daily login crystals, keep it going and increase the amount we get after 1 week. Do these and the app will be better.
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Alatmon
April 1, 2026
overall a good experience aside from some small hiccups regarding the capabilities of the AI, like weird memory and terrible math, but that's not their fault. I've tried all sorts of other apps and programs like this and most of them are worse, this one has been the most intuitive and high-quality one that I've used so far. there is another AI story service set-up called infinite worlds but that's the only other one I'd recommend, more difficult to work with and more expensive though.
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NKorok
March 19, 2026
This is... Actually kind of fire? I was stuck in other apps kind of infuriated by the complicated mess of starting the APIs and Keys and whatnot. but this app is legit kind of fire. You can also try other models with only a tap and there is a free option though the context is limited. And the coolest mechanics, sprites! Where more than one character can be put in a scenario! Truly the only downside is that the ads are not that generous when giving "energy" type limits per message. Overall, epic.
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What’s new

Bug fixes and ui update