Use the best model for each job.
GPT, Claude, Gemini, Grok, DeepSeek and more in one chat. Switch whenever you like.
iPhone Duo
AI app for iPhone Duo: every top model on the inner display
Zemith is built for the iPhone Duo's inner display. Unfold it and the app fills the screen and turns with the phone; fold it and Zemith works like on any iPhone. GPT, Claude, Gemini, Grok and more in one app, on the same account as the web and Android.
What people do with Zemith on the unfolded Duo
Research the best e-bikes under $2,000 and give me a cited comparison table.
Read a cited research report at full size
Unfold the Duo and a deep research report fills the inner display, with its sources. Deep research comes with Plus and Professional.
Rewrite this cover letter so it sounds warmer and less formal.
Ask one model, then another
Ask GPT, then switch to Claude or Gemini in the same chat and compare the answers on the big screen.
A product photo of my candle on a marble counter in soft morning light.
Browse your creations three across
On the inner display, Creative Studio's history shows three columns instead of two, so the image or video you made last week is easier to find.
Make a 10-question quiz from this lecture PDF.
Hold it wide for the study tools
Turn the unfolded Duo sideways and the Tools list shows two columns. Make a quiz, flashcards or a podcast from a PDF.
The same Zemith on the Duo, the web and Android
Research in minutes, not hours.
Deep research reads dozens of sources and writes a report with citations.
Make images and video.
The best image and video models, in one studio.
Get finished work, not just answers.
Ask once and get docs, slides, sheets and PDFs that are ready to send.
Talk to it. Show it your screen.
Real-time voice that can see your camera or screen.
One subscription.Every top AI model in one place.
Save money and stop switching between apps.
The right model for every job.
Use the latest models from OpenAI, Anthropic, Google and xAI, plus leading open models like DeepSeek, Qwen and Kimi.
Switch any time, even in the middle of a chat.
Everything you expect. Plus 50+ tools on top.
Chat, search, voice and files, plus workflows, schedules, study tools, voice and image tools. One subscription.
- Web search
- Deep research
- Chat with files
- Code sandbox
- Live voice
- Memory
- Image generation
- Video generation
- Workflow editor
- Scheduled tasks
- Image to prompt
- Remove background
- Image upscaler
- Generative fill
- Replace objects
- Text to speech
- Speech to text
- Document to podcast
- Quiz generator
- Flashcards
- Mind maps
- AI rewriter
- Humanize AI text
- Translate
- YouTube to blog
- PDF tools
- AI notes
- Whiteboard
- Slides
- FocusOS
15 subscriptions, or one.
The top models, plus image, video and voice tools, in one plan.
Without Zemith
ChatGPT PlusUS$20.00
Claude ProUS$20.00
Google AI ProUS$19.99
SuperGrokUS$30.00
Perplexity ProUS$20.00
MidjourneyUS$10.00
ElevenLabsUS$6.00
Le Chat ProUS$14.99
RunwayUS$15.00
Kling StandardUS$8.80
Gamma PlusUS$12.00
Otter ProUS$16.99
QuillBot PremiumUS$19.95
Photoroom ProUS$12.99
Quizlet PlusUS$7.99
Total if paying separatelyUS$234.70/mo
What Our Users Say
Great Tool after 2 months usage
"I love the way multiple tools they integrated in one platform. Going in the right direction."
— simplyzubair
Best in Kind!
"The quality of data and sheer speed of responses is outstanding. I use this app every day."
— barefootmedicine
Simply awesome
"The credit system is fair, models are perfect, and the discord is very responsive. Quite awesome."
— MarianZ
Great for Document Analysis
"Just works. Simple to use and great for working with documents. Money well spent."
— yerch82
Great AI site with accessible LLMs
"The organization of features is better than all the other sites — even better than ChatGPT."
— sumore
Excellent Tool
"It lives up to the all-in-one claim. All the necessary functions with a well-designed, easy UI."
— AlphaLeaf
Well-rounded platform with solid LLMs
"The team clearly puts their heart and soul into this platform. Really solid extra functionality."
— SlothMachine
Best AI tool I've ever used
"Updates made almost daily, feedback is incredibly fast. Just look at the changelogs — consistency."
— reu0691
Questions, answered
Does Zemith support the iPhone Duo?
Yes. Zemith 1.2.18 and later is built with Apple's iOS 27.1 SDK, so on the inner display it fills the whole screen instead of opening in an iPhone-sized window. On the folded outer display it works like on any iPhone.
Does Zemith turn sideways on the iPhone Duo?
Yes, on the inner display. Unfolded, Zemith turns with the phone, upright or held wide, and follows along as you fold and unfold. On the folded outer display it stays upright, as on other iPhones. The status bar stays a row at the top in every position.
Does Zemith show two screens side by side on the Duo?
No. Zemith shows one screen at a time and uses the extra width where it helps: Creative Studio's history shows three columns, and the Tools list shows two when you hold the Duo wide. It doesn't split a chat and another screen into two panes.
Can I use GPT, Claude and Gemini on the iPhone Duo in one app?
Yes. Zemith puts GPT, Claude, Gemini, Grok, DeepSeek and other models in one app, and you can switch models in the middle of a chat. The free plan includes selected GPT and Gemini models; Plus (US$15.99 a month) adds Claude and Grok models plus web search, files and Creative Studio; Professional (US$29.99 a month) adds the top models such as Claude Opus.
Does Zemith work on iPad and Android foldables too?
Yes. On iPad, Zemith runs in every orientation. On Android, tablets and unfolded foldables turn with the device the same way, while phones stay upright. One account and one plan cover the web, iPhone, iPad and Android.
Is Zemith free on the iPhone Duo?
You can start free, with no card: the free plan gives 1,100 credits a day for chat with the free models. Web search, research, files, images and video need Plus or Professional, and your plan works on every device you sign in on.
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