macOS 13+Apple silicon

Every stock. Every session. One sheet.

A native Mac app for market research. Rows are stocks, columns are trading sessions, and each cell is colored by its move. Beside the sheet, your own AI agent reads figures, researches companies and pins key points as reminders.

Download for Mac — Free

Why Mosaic

What makes it a daily tool.

  1. 01

    The market at a glance

    A heat map of your watchlist, session by session. Select one or more tickers to view a range of figures reflecting the market regime.

    The sheet 0:18
  2. 02

    An agent that reads your sheet

    Use your own Claude Code, OpenCode, or Grok Build. It builds the watchlist you want and reads everything on the sheet you see, so you can have it dive into your targets.

    Ask the agent 1:26
  3. 03

    Reminders that count down

    Have your agent pin its research, risk alerts, upcoming events, or anything deserving attention, with each item flashing as its date approaches.

    Reminders 2:10

Native

Small and fast.

Written in Rust on GPUI, the GPU-rendered framework behind the Zed editor, with no browser engine inside.

Small

10 MB
to download
22 MB
on disk

Fast

0.2 s
to open
0.3 ms
to draw a frame of the sheet
4.3 ms
to correlate 503 stocks over a year

Measured on a MacBook Air (M4, macOS 15); the frame and correlation times are medians from Mosaic’s benchmarks.

Data sources

Where every number comes from.

Mosaic downloads prices, indices and option quotes with your own EODHD account, whose free plan is enough to try a few stocks. The rest is free public data.

Source What it provides
EODHD Your account Daily prices, the VIX and other volatility indices, Treasury yields, and US option quotes for implied volatility.
FRED Free The Baa corporate bond spread over the 10-year Treasury.
SEC EDGAR Free, with a contact email Past earnings releases.
Nasdaq Free Upcoming earnings dates.

FAQ

Questions, answered.

Do I need a data account?

Yes. Mosaic downloads prices with your own EODHD account, and on first launch you paste its API token in Settings. The free plan is enough to try a few stocks; a paid plan covers whole watchlists. Implied volatility also needs EODHD’s US options data.

Which AI agents work with the chat?

Claude Code, OpenCode and Grok Build, with your own account. You pick the model and its reasoning effort in the chat.

What can the agent do?

Research companies on your sheet, read and explain what’s on your screen, build watchlists, and pin reminders to specific stocks or the broader market. Brainstorm trade ideas and new angles with ease.

Is my API key safe?

Yes. Keys are encrypted with AES-256-GCM under a master key in your macOS Keychain, and each one goes only to its own data vendor.

Is the data real-time?

No. Mosaic works with end-of-day data: a session’s cells fill once the session has closed and your data source has published its prices.

What about Windows, Linux or an Intel Mac?

Mosaic runs on Macs with Apple silicon, on macOS 13 or later. It isn’t available for other platforms yet.

Is this investment advice?

No. Mosaic is a research tool: it shows data and computes statistics about it. Nothing in the app or on this site is a recommendation to buy or sell anything.