I assume this is related to the question about webhooks for app creation? https://help.podio.com/entries/22950018-app-create-hook
There is no way to get more than 100 apps using this method. What you should do is get a list of all the orgs and spaces the user is a member of and loop over that list to get apps for each space. Pay attention to the rate limits as you are likely to hit them when doing these kinds of operations.
All the best,