AISixteen Studio
AISixteen · Image
AISixteen Studio is an app studio behind 16 small on-device AI and utility apps for iPhone, iPad and Mac, built to work offline with no accounts and no tracking.
About AISixteen Studio
What Is AISixteen Studio
AISixteen Studio is a one-person-scale software outfit that ships small, finished apps instead of one sprawling platform. The catalog covers 16 titles, a mix of private AI apps and utility tools: an AI summarizer, a typing trainer, audio and golden-ratio calculators, aviation and marine navigation tools, HVAC and lumber estimators, plus a handful of games.
The studio's whole pitch fits in a sentence. Nothing about you leaves the device. There's no sign-up, no usage analytics, no device fingerprinting, and no subscription sitting behind the download button. That makes them no-account apps in the literal sense. The AI work runs on the phone's own CPU and Neural Engine, which is why the apps keep working in a basement, on a plane, or anywhere else the signal drops.
That design has a cost. The apps live inside Apple's App Store, so there's no Android build and no Windows version of the mobile tools. Syncing between an iPhone and a Mac is left to iCloud or the app's own export, not to an account you log into.
The team also publishes Fantastic, an open-source kernel of agents built in Python, Rust, Swift and TypeScript. It's the workshop where the apps get made, and it's available as a CLI, a browser canvas and an MCP server for people who want to wire their own tools together.
Getting Started
- Open aisixteen.com and browse the catalog by category: Games, Creative tools, AI & utilities, or Sky & science.
- Pick an app and follow its App Store link. Each app is a separate download, so you only install what you need.
- Launch the app. There's no sign-up screen and no permission wall, because there's no account layer.
- For text work, paste or share an article into Indox Text and let the on-device model return a summary in a few seconds.
- For developer work, install the Fantastic CLI with one cargo command and run
fantastic canvasto open the browser workspace.
Product Information
A quick look at AISixteen Studio's pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- Privacy-conscious iPhone and Mac owners
- Field professionals who work without signal
- Students and researchers drowning in PDFs
Tasks
- Summarizing articles, reports and class readings
- Flight and marine planning
- Audio and construction math
Scenarios
- A flight review with no cockpit signal
- A renovation quote built on site
- Reading a stack of paywalled or internal PDFs
Key features
Sixteen finished apps, one small studio
The catalog runs from Ephemeris Sky, which computes natal charts and transits, to Monstro Shooter, an arcade game. Each title solves one narrow problem well rather than bundling a dozen half-built modules. That makes the studio feel less like a suite and more like a shelf of tools you pick from.
On-device AI, no cloud round trip
Indox Text summarizes articles, documents and web pages using the device's CPU and Neural Engine. Because the model runs locally, a summary arrives in seconds even with airplane mode on, and the text never crosses a network. The tradeoff is that very long documents take longer than a cloud service would need.
No accounts, no analytics
There's no login, no profile and no usage dashboard, which also means no password to reset and no marketing email to unsubscribe from. The privacy claim is architectural rather than a policy promise: the apps have nowhere to send your data even if someone asked them to.
Offline by default
Fifteen of the sixteen apps run with no connection at all, and Earth Around is the one that needs a signal for live sun tracking. Navigation, audio, finance and construction tools, plus the offline AI tools, all work in a dead zone, which is where a lot of this math actually gets used.
Safari extension for desktop reading
Indox Text ships a Safari extension alongside the iPhone, iPad and Mac apps. You can summarize a page without copying it into another window, which is the difference between a habit and a tool you forget to open.
Fantastic, the open-source kernel underneath
The studio's own build system is public. Fantastic runs agents in Python, Rust, Swift and TypeScript, exposes one send call across all of them, and plugs into vLLM, Ollama, the OpenAI Responses API, Anthropic's Messages API and Apple's on-device model. Developers can install the CLI, open a browser canvas, or connect Claude Code and Codex through MCP.
Pros and cons
Pros
- Zero data collection is built into the architecture, not just written into a policy page.
- The AI summarizer works in airplane mode, which matters for confidential documents and travel.
- No subscription means the cost is a one-time App Store download per app.
- The catalog covers real professional math: E6B flight planning, tides, LUFS metering and HVAC load.
- The Fantastic kernel is open source, so developers can inspect or reuse the machinery.
Cons
- The mobile apps are Apple-only, so Android and Windows users get nothing from the catalog.
- Each app is a separate purchase or download, which gets tedious if you want five of them.
- There's no cross-device sync beyond iCloud, so a summary made on the phone won't appear on a work PC.
- Support comes from a small team, and there's no phone line or live chat when a calculation looks wrong.
Frequently asked questions
It's a software studio that publishes 16 small apps for iPhone, iPad and Mac, plus an open-source agent kernel called Fantastic. The apps focus on AI summarization, navigation, audio and construction math, and games.
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