All your data is stored locally on your device. To delete it, simply delete the Poohoo app from your iPhone.
No, Poohoo does not sync your data to the cloud. Your data is only stored on your device. Make sure to back up your iPhone if you want to preserve your data.
Yes, Poohoo is completely free to download and use. The app is supported by non-personalized advertisements (Google AdMob) and has no in-app purchases or subscriptions.
Currently, Poohoo is only available for iOS (iPhone). Android support may be added in the future.