The developer of Minibar+ is Bartech Systems International and all inquiries must go to them.
The GDPR gives EU and UK residents a "right to erasure" meaning that you can request app developers like Bartech Systems International to delete all your data it holds. Bartech Systems International must comply within 1 month.
The CCPA lets American residents request that Bartech Systems International deletes your data or risk incurring a fine (upto $7,500 dollars).