This sample app was made for a customer to demonstrate how to port a Desktop App to a Mobile App. This customer has an existing Desktop application. They provided us a mock up of their mobile app (see below) which did not follow iOS UI best-practices. We created a sample app to demonstrate how to adhere to mobile UI while still maintaining a workflow familiar to their desktop app.
This app utilizes a SQLite databse, MVVM, along with these Xamarin.Forms controls: Carousel Page, Search Bar, Picker, Grid, StackLayout, Navigation Page, ListView, ViewCell. It also shows how to tweak the UI to best appear on larger tablet screens. It also includes a Shake Listener, and will display a pop-up whenever the user shakes the device.
The customer provided us this wireframe as the initial design for their mobile application. Their goal was to replicate their existing desktop app . 
This is the sample app we provided as it appears on a tablet
This is the sample app we provided as it appears on a phone
Brandon Minnick
Xamarin Customer Success Engineer
MIT License
Copyright (c) 2016 Brandon Minnick
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.