VOL. XCIV, NO. 247

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Friday, December 26, 2025

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Tool Comparison

GammaWins Calculator vs Prospero.ai comparison

Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.

Quick takeaways

GammaWins Calculator adds Options P&L coverage that Prospero.ai skips.

Prospero.ai includes Stock Ideas, Screeners, ETF Screeners, Watchlist, Alerts, Market Sentiment, Dark Pool & Off-Exchange, Scores, Education, Blogs, and Newsletters categories that GammaWins Calculator omits.

Prospero.ai offers mobile access, which GammaWins Calculator skips.

In depth comparison

GammaWins Calculator

gammawins.com

Web-based options profit calculator focused on payoff + Greeks visualization. Core tools are usable without an account; some account-only features will prompt sign-in. Market data shown in the calculator is currently 15-minute delayed; GammaWins states paid tiers are planned for live data + direct index feeds.

Platforms

Web

Pricing

Free

Quick highlights

Payoff/strategy value visualization over time and underlying price, with optional Greeks overlays.
Built-in templates for common options strategies (single-leg, spreads, volatility, and complex multi-leg strategies) and supports building custom multi-leg strategies.
Supports US equity and equity-index options plus Danish/Swedish/Norwegian equity and index options listed on Nasdaq Nordic.
Options quotes are sourced via OPRA (calculator currently displays 15-minute delayed data for options and stock prices).
Modeling: uses Black-Scholes for European options (mainly index options) and stock calls, and Bjerksund-Stensland for American puts.

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Prospero.ai

prospero.ai

Mobile-first AI signals app for U.S. stocks & ETFs. Offers 10 proprietary signals (5 short-term: Net Options Sentiment, Net Social Sentiment, Net Institutional Flow, Dark Pool, Short Pressure; 5 long-term: Upside/Downside Breakout, Profitability, Growth, Market Similarity), plus a Daily Screener, ‘Our Picks’, watchlists, and notifications. No broker sync, public API, or advanced options greeks/IV surfaces are documented.

Platforms

Mobile

Pricing

Free

Quick highlights

Ten proprietary signals: 5 short-term (Options/Social/Institutional/Dark Pool/Short Pressure) and 5 long-term (Upside/Downside Breakout, Profitability, Growth, Market Similarity).
Short-term Net Options Sentiment updates ~every 2–5 minutes (real‑time orientation).
Daily Screener & ‘Our Picks’ lists to surface candidates quickly for different horizons (long/short, short‑term/long‑term).
Mobile apps on iOS and Android with watchlists and in‑app notifications.
Education hub with plain‑English signal docs plus investing/trading newsletters (Substack).

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Where they differ

GammaWins Calculator

Distinct strengths include:

Options P&L

Payoff/strategy value visualization over time and underlying price, with optional Greeks overlays.
Built-in templates for common options strategies (single-leg, spreads, volatility, and complex multi-leg strategies) and supports building custom multi-leg strategies.
Supports US equity and equity-index options plus Danish/Swedish/Norwegian equity and index options listed on Nasdaq Nordic.
Options quotes are sourced via OPRA (calculator currently displays 15-minute delayed data for options and stock prices).

Prospero.ai

Distinct strengths include:

Stock Ideas Screeners ETF Screeners Watchlist Alerts Market Sentiment Dark Pool & Off-Exchange Scores

Ten proprietary signals: 5 short-term (Options/Social/Institutional/Dark Pool/Short Pressure) and 5 long-term (Upside/Downside Breakout, Profitability, Growth, Market Similarity).
Short-term Net Options Sentiment updates ~every 2–5 minutes (real‑time orientation).
Daily Screener & ‘Our Picks’ lists to surface candidates quickly for different horizons (long/short, short‑term/long‑term).
Mobile apps on iOS and Android with watchlists and in‑app notifications.

Feature-by-feature breakdown

Attribute	GammaWins Calculator	Prospero.ai
Categories Which research workflows each platform targets	Shared: Options & Derivatives, Data Visualizations Unique: Options P&L	Shared: Options & Derivatives, Data Visualizations Unique: Stock Ideas, Screeners, ETF Screeners, Watchlist, Alerts, Market Sentiment, Dark Pool & Off-Exchange, Scores, Education, Blogs, Newsletters
Asset types Supported asset classes and universes	Options, Stocks	Stocks, ETFs
Experience levels Who each product is built for	Intermediate, Advanced	Beginner, Intermediate
Platforms Where you can access the product	Web	Mobile
Pricing High-level pricing models	Free	Free
Key features Core capabilities called out by each vendor	Unique Payoff/strategy value visualization over time and underlying price, with optional Greeks overlays. Built-in templates for common options strategies (single-leg, spreads, volatility, and complex multi-leg strategies) and supports building custom multi-leg strategies. Supports US equity and equity-index options plus Danish/Swedish/Norwegian equity and index options listed on Nasdaq Nordic. Options quotes are sourced via OPRA (calculator currently displays 15-minute delayed data for options and stock prices). Modeling: uses Black-Scholes for European options (mainly index options) and stock calls, and Bjerksund-Stensland for American puts. Dividend handling currently assumes a constant dividend rate based on recent payout history; a more advanced dividend model using exact ex-dividend dates / finite-difference is described as part of an upcoming paid plan.	Unique Ten proprietary signals: 5 short-term (Options/Social/Institutional/Dark Pool/Short Pressure) and 5 long-term (Upside/Downside Breakout, Profitability, Growth, Market Similarity). Short-term Net Options Sentiment updates ~every 2–5 minutes (real‑time orientation). Daily Screener & ‘Our Picks’ lists to surface candidates quickly for different horizons (long/short, short‑term/long‑term). Mobile apps on iOS and Android with watchlists and in‑app notifications. Education hub with plain‑English signal docs plus investing/trading newsletters (Substack).
Tested Verified by hands-on testing inside Find My Moat	Not yet	Not yet
Editor pick Featured inside curated shortlists	Standard listing	Standard listing

Frequently Asked Questions

Which workflows do GammaWins Calculator and Prospero.ai both support?

Both platforms cover Options & Derivatives, and Data Visualizations workflows, so you can research those use cases in either tool before digging into the feature differences below.

Do GammaWins Calculator and Prospero.ai require subscriptions?

Both GammaWins Calculator and Prospero.ai keep freemium access with optional paid upgrades, so you can trial each platform before committing.

Which tool has mobile access?

Prospero.ai ships a dedicated mobile experience, while GammaWins Calculator focuses on web or desktop access.

What unique strengths set the two platforms apart?

GammaWins Calculator differentiates itself with Payoff/strategy value visualization over time and underlying price, with optional Greeks overlays., Built-in templates for common options strategies (single-leg, spreads, volatility, and complex multi-leg strategies) and supports building custom multi-leg strategies., and Supports US equity and equity-index options plus Danish/Swedish/Norwegian equity and index options listed on Nasdaq Nordic., whereas Prospero.ai stands out for Ten proprietary signals: 5 short-term (Options/Social/Institutional/Dark Pool/Short Pressure) and 5 long-term (Upside/Downside Breakout, Profitability, Growth, Market Similarity)., Short-term Net Options Sentiment updates ~every 2–5 minutes (real‑time orientation)., and Daily Screener & ‘Our Picks’ lists to surface candidates quickly for different horizons (long/short, short‑term/long‑term)..

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Stay on top of related tools

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