Prio: Stock Market Forecast
Predict Nikkei 225 & S&P 500
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
What’s your call on the next market move? Predict the Nikkei 225 and S&P 500, compare crowd forecasts, review results, track your accuracy, and climb the rankings.
What will the market do next?
Prio is a participatory market forecasting app where you make your own predictions for the Nikkei 225 and S&P 500, compare them with the crowd, and review how your forecasts performed.
Will the market rise or fall next?
Where will it be one week or one month from now?
Make your call, see what other participants think, and compare predictions with actual market results.
■ Predict the Nikkei 225 and S&P 500
Switch between the Nikkei 225 and S&P 500 and make forecasts for different time horizons.
For the next market move, choose whether you expect the market to rise or fall.
For one-week and one-month forecasts, enter your expected price while viewing the change from the reference price.
■ See what the crowd expects
After forecasting closes, you can view aggregated participant predictions.
For direction forecasts, see:
• Percentage predicting a rise
• Percentage predicting a fall
• Number of votes
For price forecasts, see:
• Median forecast
• Average forecast
• Number of votes
• Bullish or bearish tendency
Compare your own view with the overall market outlook from other participants.
■ Compare forecasts with actual results
Review one-week and one-month forecasts alongside actual market prices.
Charts let you compare the crowd’s median prediction with real market movements and review details including bullish and bearish rates, vote counts, and the difference between forecasts and actual results.
■ Track your forecasting performance
Your personal page keeps a record of your activity, including:
• Total forecasts
• Settled forecasts
• Direction forecast accuracy
• Average price forecast error
• Forecast history
Instead of relying on memory, you can see how your market calls have actually performed over time.
■ Compete in the rankings
Prio includes rankings based on direction accuracy and average forecast error for one-week and one-month predictions.
Check your position and top percentile, and keep testing your market instincts over time.
■ Check the market before making your call
View market charts directly from the prediction screen.
Review recent market movements, form your own view, and submit your forecast.
Prio is great for people who:
• Follow the Nikkei 225
• Watch the S&P 500 and U.S. markets
• Want to record their market forecasts
• Want to measure their prediction accuracy
• Are curious whether other participants are bullish or bearish
• Want to build a habit of following the market
• Enjoy testing their market intuition
Don’t just watch the market. Make your call.
Predict.
Compare.
Review.
Where do you think the Nikkei 225 and S&P 500 will go next?
Prio does not provide investment advice, recommendations to buy or sell financial products, or guarantees of future prices or returns. Participant forecasts, aggregated results, and rankings do not guarantee future market performance or investment outcomes. Investment decisions remain your own responsibility.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, akira kawata, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- akira kawata
- Size
- 31 MB
- Category
- Finance
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 akira kawata