
jQuery
Babel
Composer
OpenSSL
Flutter
Raven.js
Symfony
A framework for building native apps with React

GEX Horizon
FinViz
GammaWalls
TradingView
FlashAlpha
OptionCharts.io
Barchart
Options analytics platform that maps dealer gamma exposure, Vanna/Charm flows, and ML-driven directional signals into a single trading dashboard.
Which is more popular?
Based on our record, React Native seems to be more popular. It has been mentioned 247 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | reactnative.dev | chartgex.com |
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In their own words, as submitted to SaaSHub.


No description of React Native yet.
ChartGEX is an options analytics platform built for traders who want to understand the mechanical forces behind market price movement, not just where price has been, but where it's structurally obligated to go. At the core of ChartGEX is Gamma Exposure (GEX) analysis. Market makers who sell...
What each product offers, as listed by its team.


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React Native in 2019 & Beyond
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As answered by people managing React Native and ChartGEX.
ChartGEX's answer:
Most options tools show you open interest and volume — and stop there. ChartGEX goes a layer deeper by quantifying what dealers are actually forced to do because of that positioning. That's the core difference.
When a market maker sells options, they have to delta-hedge continuously. That hedging isn't random — it creates mechanical buying and selling pressure at specific strikes. ChartGEX maps those obligations in real time, so you can see where price is likely to get pinned, repelled, or accelerated before it happens — not after.
Beyond GEX, the platform layers in Vanna and Charm flow analysis, which tell you how dealer hedging behavior shifts as volatility moves and time decays. That's what drives the 2pm melt-ups, the OpEx pins, the charm-driven drifts that catch most traders off guard. ChartGEX surfaces those dynamics explicitly.
Then there's the ML prediction layer — directional forecasts calibrated to specific strike-level mechanics, not generic trend signals. It synthesizes gamma positioning, flow imbalances, and vol regime data into something actionable: a structural lean that either aligns with your thesis or tells you to wait.
The data is sourced from institutional-grade feeds (OPRA-level), updated continuously throughout the session. That's not standard for retail-facing tools. Most platforms run on delayed snapshots. ChartGEX doesn't.
ChartGEX's answer:
The alternatives — TradingView, FinViz, OptionCharts.io — are useful tools, but they're built around different assumptions about how markets work. They focus on price history, technical patterns, and static open interest. ChartGEX is built around market structure: specifically, what options dealers are obligated to do based on their current hedging positions.
That distinction matters in practice. GEX walls don't show up on a candlestick chart. The gamma flip level that determines whether dealers suppress or amplify the next move isn't something a moving average will tell you. ChartGEX gives you that structural context as a first-class input — not an afterthought.
A few specific reasons traders choose ChartGEX over the alternatives:
The GEX analysis is calculated from real institutional-grade data, not delayed retail feeds. That matters especially for 0DTE and intraday trading where stale data is worse than no data.
Vanna and Charm flows are included. Most competing tools don't touch these at all, even though they're central to understanding why price accelerates into OpEx or why vol expansion doesn't follow through.
The ML prediction layer adds a directional signal that's tied to structural positioning, not just historical price behavior. It's a pressure test on your thesis, not a replacement for it.
And at $29/month after a free trial, the price point is a fraction of what institutional analytics desks charge for similar data. For independent traders and small prop shops, ChartGEX is the only place this level of analysis is even accessible.
ChartGEX's answer:
ChartGEX is built for traders who already have a baseline understanding of options markets and want to go deeper into the mechanics of price movement. It's not a beginner platform — and it doesn't try to be.
The core audience breaks down into a few groups:
Active retail traders who trade SPX, SPY, QQQ, or individual equities with options exposure. They're typically running 0DTE or short-dated strategies and need real-time structural levels — gamma walls, flip points, magnet strikes — rather than lagging indicators.
Independent professionals and prop traders who manage meaningful position sizes and need data that holds up under pressure. For them, the cost of a bad read on market structure far exceeds a $29/month subscription.
Systematic traders who are building edge into their process. ChartGEX's API access makes it straightforward to pull GEX, Vanna, and Charm data directly into a trading model or alerting system.
What ties them all together is a frustration with tools that explain what happened after the fact. ChartGEX is specifically for traders who want to understand the structural forces shaping price before the move develops — not after it's already played out on the tape.
ChartGEX's answer:
ChartGEX started from a pretty simple observation: the options market is the most information-rich market in the world, and most traders are using maybe 5% of what's actually in there.
The tools that existed were either too basic — open interest charts, put/call ratios — or locked behind institutional infrastructure that costs thousands of dollars a month. The analytics that serious options desks rely on, things like gamma exposure mapping, Vanna flow modeling, charm decay — those just weren't accessible to independent traders.
The goal was to change that. Not by dumbing the data down, but by building an interface that makes complex positioning data actually usable in a live trading session. You shouldn't need a quant background to know whether the current gamma regime favors fading moves or riding them. That answer should be visible in under a minute.
So ChartGEX was built with that constraint in mind: institutional-grade data, engineered for practical daily use. The ML layer came later, as a way to synthesize the positioning signals into something that pressure-tests your existing thesis rather than replacing your judgment entirely.
It's still early. The platform keeps evolving based on direct feedback from the traders using it. But the core belief hasn't changed — every trader deserves access to the same structural intelligence that institutions use to make decisions.
ChartGEX's answer:
The frontend is built on Next.js, which gives us server-side rendering where it matters for performance and a clean component structure for the dashboard UI. The charting layer handles real-time data visualization across multiple instruments and expiration cycles simultaneously, so responsiveness under load was a key design constraint from the start.
On the data side, the platform ingests options chain data from institutional-grade feeds — open interest, volume, implied volatility surfaces, and Greeks across every listed strike. The GEX, Vanna, and Charm calculations run continuously throughout the session, which requires a backend infrastructure that can process and serve that data with minimal latency.
The ML prediction layer is a separate model pipeline trained on gamma positioning, options flow, and volatility regime data. It's designed to output calibrated directional forecasts rather than binary signals — which means the model architecture prioritizes reliability over novelty.
The API is built to be developer-friendly for systematic traders who want to pull positioning data directly into their own workflows or alerting systems.
Share your experience with using React Native and ChartGEX. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Pioneered by Meta Platforms, Inc., React Native is a remarkable JavaScript framework that merges native app development with JavaScript libraries, offering a dependable solution for creating exemplary native apps for...
Introduced in 2015 by Facebook, React Native is an open-source framework based on JavaScript. Being a developer-friendly framework, it’s a mobile-first platform that is capable of rendering mobile apps for multiple...
React Native is an open-source UI framework for writing native Android and iOS apps using JavaScript and React. React Native does deliver excellent prototyping capabilities, however. The React framework lends itself...
ChartGEX has genuinely changed how I approach trading decisions. Before using it, understanding gamma exposure and options flow felt like trying to read a map without a legend. ChartGEX makes all of that visual,...
Recommendations tracked on public social media and blogs since March 2021.


Electron, React Native, and more recently Tauri came out of that. They gave teams a dynamic runtime, hot reloading, and the whole ecosystem of web libraries, so one team could ship to several platforms at once. And it worked: Slack,... - Source: dev.to / 9 days ago
I usually leave Crashlytics out of my my posts, but with a lot of React devs now using React Native often, I had to keep it here. Firebase Crashlytics is a real-time crash reporter that helps developers track, prioritize, and fix... - Source: dev.to / 26 days ago
React Native is currently the most popular JavaScript framework for creating mobile apps. Neither Ionic nor NativeScript can match its popularity. Its popularity comes from the fact that it was tied to React from the start, while both... - Source: dev.to / about 1 month ago
Tracking ChartGEX since May 2026.
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