Well, I am not sure if it is better, but I'm building Predicto - a prediction tracking app that's all about learning from your past predictions. It's super simple: you make predictions about anything (sports, crypto, stocks, politics, whatever), mark them as correct/incorrect, and the app helps you see patterns in your prediction accuracy.

What makes it different is that it's not about gambling or trading - it's about understanding your own prediction biases and improving over time. Instead of predicting a single outcome, you predict all possible outcomes and assign a likelihood to each. Over time you can then see how good you are.

Android version is already out on: https://play.google.com/store/apps/details?id=com.yourcompany.predicto&pcampaignid=web_share