# KATY: Charts That Forecast — The quant work already done > Technical analysis charting app with pre-built quant models for equities and crypto. (iPhone/iPad app by QuantSignals, Inc..) - Source: https://appshunter.io/ios/app/katy-charts-that-forecast/id6743690109 (this page in markdown: same URL + `.md`) - Developer: [QuantSignals, Inc.](https://appshunter.io/developer/1543121585) - Category: Finance - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 16.4 · 49 MB - Languages: American English - Released: 2026-08-18 - Data updated: 2026-08-23 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/katy-charts-that-forecast/id6743690109/reviews.md ## What is KATY? 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 ## Key features - Technical analysis charting - Quant model overlays (FORECAST, TURTLE, GEX, SPREAD) - US equities and major crypto support - Candlestick charts with pan/zoom - Synced watchlist across devices - Trend screener - Read-only chart analysis ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | KATY Premium Monthly | $9.99 | per month | | KATY Premium Annual | $59.99 | per year | ## Frequently asked questions about KATY ### What is KATY? KATY is a technical analysis charting app that provides pre-computed quantitative models overlaid directly on price charts for US equities and major cryptocurrencies. It focuses on presenting analytical data rather than facilitating trades. ### What kind of quant models does KATY offer? KATY offers several proprietary quant models including FORECAST (time-series foundation model projections), TURTLE (trend state visualization with Donchian channels and ATR stops), GEX (gamma exposure by strike), and SPREAD (credit-spread structure over price). ### Can I trade directly from KATY? No, KATY is strictly a chart-reading application. It does not offer order entry, broker connections, account linking, wallet integration, or any form of trading. ### How much does KATY Premium cost? KATY Premium is available as an auto-renewable subscription. Monthly access is $9.99 per month, and annual access is $59.99 per year. Existing QuantSignals Premium or Gold members can sign in to unlock charts at no extra cost. ### How do I cancel my KATY Premium subscription? Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your device's Settings > Apple Account > Subscriptions. ### What devices is KATY available on? KATY is available on iPhone and iPad, indicated by its support for these devices. The app is rated for ages 4 and up. ### How often is KATY updated? KATY was last updated on August 18, 2026, with version 1.0. The release date was also August 18, 2026, suggesting it is a new application. ### Does KATY have ads? No, KATY does not contain advertisements. The app's functionality is accessed through a freemium model with optional premium subscriptions. ## Version history (last 1 release) ### 1.0 — 2026-08-18 No release notes. ## More apps by QuantSignals, Inc. - [QuantSignals: FST Trading](https://appshunter.io/ios/app/quantsignals-fst-trading/id6449400504) - [SuperDeck: Pitch Deck & Video](https://appshunter.io/ios/app/superdeck-pitch-deck-and-video/id6743690167) - [Scar: Trading Journal](https://appshunter.io/ios/app/scar-trading-journal/id6791444917) - [Flow Voice: Options Tape](https://appshunter.io/ios/app/flow-voice-options-tape/id6791445221) - [Henry Zhang: Books & Audio](https://appshunter.io/ios/app/henry-zhang-books-and-audio/id6792229566) All apps by QuantSignals, Inc.: https://appshunter.io/developer/1543121585 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*