
GammaWalls
GammaFlip
FlashAlpha
ChartGEX
FinViz
Barchart
Celwalls.com
Free real-time Gamma Exposure (GEX) dashboard tracking SPX, SPY & QQQ Call/Put Walls, Zero Gamma Flips, and Dealer Hedging Levels.

React Native
BuildFire
Apache Cordova
NativeScript
Xamarin
PhoneGap
Framework 7
Ionic is a cross-platform mobile development stack for building performant apps on all platforms with open web technologies.

Which is more popular?
Based on our record, Ionic seems to be more popular. It has been mentioned 10 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | gexhorizon.com | ionic.io |
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| Company | 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


Track Market Maker Positioning in Real-Time GEX Horizon is a free, real-time Gamma Exposure (GEX) analytics platform for options traders who need to see where dealers are positioned — and what they'll be forced to do next. Unlike legacy GEX tools that refresh daily, GEX Horizon delivers...
No description of Ionic yet.
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
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Walkthroughs and reviews on video.
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing GEX Horizon and Ionic.
GEX Horizon's answer
GEX Horizon is the only free platform that delivers real-time, sub-second gamma exposure data via WebSocket streaming. Most GEX tools update once daily — we update with every options trade. Key differentiators:
GEX Horizon's answer
GEX Horizon's answer
GEX Horizon's answer
GEX Horizon was built out of frustration with the status quo in options analytics. Institutional traders have always had access to real-time gamma exposure data — it's fundamental to understanding market maker behavior and intraday volatility regimes. Yet the tools available to most traders were either:
We believed that every trader deserves to see where the dealers are positioned — in real-time, without a paywall. So we built the WebSocket infrastructure, the real-time GEX computation engine, and the intuitive dashboards that make institutional-grade options market microstructure data accessible to everyone. The result is GEX Horizon — free, real-time, and built for the traders who need it most.
Share your experience with using GEX Horizon and Ionic. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Enter GEX Horizon. Built from the ground up to solve the latency, cost, and integration problems of legacy platforms, GEX Horizon is quickly emerging as the premier SpotGamma alternative. Below, we break down exactly...
Predicting Market Maker Behavior: If dealers are in a "Positive Gamma" regime, they will hedge by selling into rallies and buying into dips, creating a tight, low-volatility, range-bound market. If they are in a...
Ionic is mainly known for its simplicity and, thus, is an appropriate choice for those who have a small team or own startups. The framework is popular for its predesigned UI components, which catalyze the overall...
Ionic is an open-source UI framework that uses web technologies like HTML, CSS, and JavaScript to build progressive web and mobile apps. Ionic shines for apps centered around forms, lists, and data. The extensive UI...
It’s always important that an app is responsive and especially important with Ionic, which is designed to reach multiple platforms with one codebase. This is not supported by Moxly, which is not good in the realm of...
Recommendations tracked on public social media and blogs since March 2021.


Tracking GEX Horizon since Jul 2026.
As you may remember, Ionic, the company where I’ve worked as a Developer Advocate for the past year and a half, was acquired in late 2022 by OutSystems. As part of that acquisition, I’m excited to announce that I transitioned to a Lead... - Source: dev.to / almost 3 years ago
You're looking for a framework to build a progressive web app. Such as Ionic: https://ionic.io/. Source: over 3 years ago
Some website's that I've collected that use the styling I'm on about; Ionic.io, spline.design, wickedbackgrounds.com, coolbackgrounds.io,. Source: over 4 years ago
When comparing GEX Horizon and Ionic, you can also consider the following products.

Stop staring at complex GEX heatmaps. GammaWalls scores SPX/ES dealer positioning and wall strength automatically throughout the trading day. $37/mo, cancel anytime.
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A framework for building native apps with React
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All five crypto options exchanges in one gamma map, US markets alongside, with alerts, API and AI access, from $39 a month. 3-day free trial.
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BuildFire is the easiest way for small businesses to build a mobile app in a matter of minutes for iOS and Android.
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Real-time options analytics API - Greeks, gamma exposure, SVI vol surfaces for 6,000+ underlyings. Free tier available.
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Platform for building native mobile applications using HTML, CSS and JavaScript
Compare Apache Cordova to GEX Horizon or Ionic: