No application can be guaranteed for app store approval. However, we have built hundreds of app and have successfully deployed them both on App Store and Play Store. This is why we pride at having 100% App Store Approval ratio.
Our teams have an understanding of these app store guidelines and also have knowledge about instances that pose rejection risks such as legal/business issues, technical issues, etc. We ensure to make necessary corrections in case your app is rejected due to technical reasons and appeal for successful inclusion in the App Store or Play Store.