If I uninstall the app and reinstall the app back, will I lose my registrations?
Regardless of whether you reinstall the app on the same device or a new one, all active registrations will be lost. That's why you'll have to register again in the desired raffles if the registration period is still active. If the registration period has ended, unfortunately, we will not be able to recover your old ones.
Remember that only one participation is allowed per account and device, so you cannot participate from several devices or from the same device with several accounts.