KATY: Charts That Forecast
The quant work already done
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Charts with the quant work done: forecast paths, Donchian trend state, gamma walls and credit spreads, drawn on the price.
Charting, with the quant work already done.
KATY is a technical-analysis charting app for US equities and major crypto — candles, timeframes, pan, zoom, scrub — with our own quant models drawn directly on the price instead of left to you to compute.
WHAT IS ON THE CHART
FORECAST — a time-series foundation model's projected path, with its backtest line and error band, so you can see how the model has actually done on this name before you trust today's read.
TURTLE — trend state made visual: Donchian entry and exit channels, a 2xATR stop, held-position bands, and a per-window backtest.
GEX — gamma exposure by strike, drawn against price, with call and put walls and the expected move.
SPREAD — credit-spread structure over price: strike lines, ROI, probability, credit and max loss, with leg detail.
TODAY — every long and short the engines currently have, ranked, with the time left on each. Tap a row to land on the chart behind it.
HOW IT WORKS
Pick any ticker or tap a symbol chip. Switch timeframes. The overlays follow. Your watchlist syncs across devices, and the trend screener describes only the names you actually track.
Every screen is read-only. There is no order entry, no broker connection, no account linking, no wallet, and no trading of any kind — KATY is a chart you read, not a place you trade.
Charts and model overlays require KATY Premium, available in the app as an auto-renewable subscription: KATY Premium Monthly at $9.99 per month, or KATY Premium Annual at $59.99 per year. Payment is charged to your Apple Account at confirmation of purchase. A subscription renews automatically unless cancelled at least 24 hours before the end of the current period, and you can manage or cancel it in Settings > Apple Account > Subscriptions.
Already a QuantSignals Premium or Gold member? Sign in with that account and the same charts unlock here at no extra cost — no second purchase.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://quantsignals.xyz/privacy-policy
Ratings & Reviews
The developer, QuantSignals, Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- QuantSignals, Inc.
- Size
- 51.1 MB
- Category
- Finance
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- KATY Premium Annual $59.99
- KATY Premium Monthly $9.99
- Copyright
- © 2026 Heng Zhang