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Tech·Big Tech

#1 Free App in the US Apple App Store on March 31?

Market icon
Tech·Big Tech

#1 Free App in the US Apple App Store on March 31?

Mar 31

Mar 31

ChatGPT 96%

MyTSA 1.4%

Claude by Anthropic 1.1%

Google <1%

Polymarket
NEW

ChatGPT 96%

MyTSA 1.4%

Claude by Anthropic 1.1%

Google <1%

Polymarket
NEW
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ChatGPT

$501 Vol.

96%

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MyTSA

$43 Vol.

1%

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Claude by Anthropic

$170 Vol.

1%

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Google

$151 Vol.

1%

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Temu: Shop Like a Billionaire

$146 Vol.

1%

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Threads

$151 Vol.

1%

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NCAA March Madness Live

$146 Vol.

1%

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MLB

$101 Vol.

1%

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Google Gemini

$246 Vol.

<1%

This market will resolve according to the iOS app, ranked #1 in the United States on the iPhone Apple App Store's overall Top Charts under "Free Apps", as of 12:00 PM ET on the specified date. To find the overall chart, click "Apps" at the bottom of the US iOS App Store app, scroll down to "Top Free Apps" and click "See All". Then under "Free Apps" in the "Top Charts" section, you'll see the list that will be used as the resolution source to this market (https://apps.apple.com/us/charts/iphone).ChatGPT commands a 95.5% implied probability as the #1 free app in the US Apple App Store on March 31, driven by its current top ranking and proven resilience to challengers. As of March 26–28, OpenAI's AI chatbot holds the lead after reclaiming it from Anthropic's Claude, which briefly surged to #1 in early March amid publicity from rejecting a Pentagon contract over AI safety concerns, and NCAA March Madness Live, which peaked mid-tournament around March 19 but has settled at #2. Ongoing enhancements to ChatGPT's large language model capabilities sustain massive daily active users, outpacing rivals like Google Gemini and seasonal apps such as MLB or MyTSA. With the NCAA Elite Eight looming, a massive viewership spike could challenge this consensus, though traders see slim odds given historical patterns of AI dominance.

ChatGPT commands a 95.5% implied probability as the #1 free app in the US Apple App Store on March 31, driven by its current top ranking and proven resilience to challengers. As of March 26–28, OpenAI's AI chatbot holds the lead after reclaiming it from Anthropic's Claude, which briefly surged to #1 in early March amid publicity from rejecting a Pentagon contract over AI safety concerns, and NCAA March Madness Live, which peaked mid-tournament around March 19 but has settled at #2. Ongoing enhancements to ChatGPT's large language model capabilities sustain massive daily active users, outpacing rivals like Google Gemini and seasonal apps such as MLB or MyTSA. With the NCAA Elite Eight looming, a massive viewership spike could challenge this consensus, though traders see slim odds given historical patterns of AI dominance.

Experimental AI-generated summary referencing Polymarket data · Updated
This market will resolve according to the iOS app, ranked #1 in the United States on the iPhone Apple App Store's overall Top Charts under "Free Apps", as of 12:00 PM ET on the specified date. To find the overall chart, click "Apps" at the bottom of the US iOS App Store app, scroll down to "Top Free Apps" and click "See All". Then under "Free Apps" in the "Top Charts" section, you'll see the list that will be used as the resolution source to this market (https://apps.apple.com/us/charts/iphone).ChatGPT commands a 95.5% implied probability as the #1 free app in the US Apple App Store on March 31, driven by its current top ranking and proven resilience to challengers. As of March 26–28, OpenAI's AI chatbot holds the lead after reclaiming it from Anthropic's Claude, which briefly surged to #1 in early March amid publicity from rejecting a Pentagon contract over AI safety concerns, and NCAA March Madness Live, which peaked mid-tournament around March 19 but has settled at #2. Ongoing enhancements to ChatGPT's large language model capabilities sustain massive daily active users, outpacing rivals like Google Gemini and seasonal apps such as MLB or MyTSA. With the NCAA Elite Eight looming, a massive viewership spike could challenge this consensus, though traders see slim odds given historical patterns of AI dominance.

ChatGPT commands a 95.5% implied probability as the #1 free app in the US Apple App Store on March 31, driven by its current top ranking and proven resilience to challengers. As of March 26–28, OpenAI's AI chatbot holds the lead after reclaiming it from Anthropic's Claude, which briefly surged to #1 in early March amid publicity from rejecting a Pentagon contract over AI safety concerns, and NCAA March Madness Live, which peaked mid-tournament around March 19 but has settled at #2. Ongoing enhancements to ChatGPT's large language model capabilities sustain massive daily active users, outpacing rivals like Google Gemini and seasonal apps such as MLB or MyTSA. With the NCAA Elite Eight looming, a massive viewership spike could challenge this consensus, though traders see slim odds given historical patterns of AI dominance.

Experimental AI-generated summary referencing Polymarket data · Updated

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Frequently Asked Questions

"#1 Free App in the US Apple App Store on March 31?" is a prediction market on Polymarket with 9 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "ChatGPT" at 96%, followed by "MyTSA" at 1%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 96¢ implies that the market collectively assigns a 96% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"#1 Free App in the US Apple App Store on March 31?" is a newly created market on Polymarket, launched on Mar 27, 2026. As an early market, this is your opportunity to be among the first traders to set the odds and establish the market's initial price signals. You can also bookmark this page to track volume and trading activity as the market gains traction over time.

To trade on "#1 Free App in the US Apple App Store on March 31?," browse the 9 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "#1 Free App in the US Apple App Store on March 31?" is "ChatGPT" at 96%, meaning the market assigns a 96% chance to that outcome. The next closest outcome is "MyTSA" at 1%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "#1 Free App in the US Apple App Store on March 31?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.