So if I’m to use the app it would be purely because I want to have not because I want to improve my chance of winning anything; I don’t believe they can do that for me.
If this app can make it easier for you to track your betting history and it's free, why not give it a try? I haven't checked the app myself, but I'm interested in using it to keep a record of my sports betting experiences. This way, I can see how successful my betting strategy is and gain more confidence when betting larger amounts once I have a convincing track record.
It’s not a bet tracking app.
It’s just an app where you can see people make predictions and if their prediction comes out right they’ll be given a certain amount of coins (the coins depends on how much you staked initially) so if you are a punter and too lazy to make predictions or analyze games you can just go to the app and look at the leaderboard and look for those win high win rates and follow their predictions.
As for the coins that users normally win, I don’t know what it’s used for but if you’re looking for a way to experience betting while not risking your money you can try the app; but note that it does not track your real bet history.
This is probably the application OP is referring. https://apps.apple.com/us/app/omada-make-sport-social/id1534593212
If you will click on that link, you can find the descriptions thay says.
Live the thrill of the games with no risk
Climb the leaderboard and win rewards
Create a squad with your mates.
So although I haven't tried it yet but judging on the descriptions alone, you are not a watcher only but you can also join the fun, and with that, I'm sure that application has a way to check your betting history and that data is very useful to evaluate your performance in sports betting activity.