CoSy - Contact Sync is a free Android app developed by Michael Flisar, falling under the category of Social & Communication. This app allows you to sync your Facebook friends' profile images with your local phone contact images in three easy steps. First, import your friends from Facebook. Second, link your contacts with your Facebook friends by simply telling the app which Facebook friend corresponds to which phone contact. Finally, sync your images.

It is important to note that CoSy - Contact Sync works only with real local contacts like sim, phone, and Gmail contacts. Other contact sources, such as Outlook, are not supported. The app allows you to sync public Facebook profile images with your phone contacts. You can link contacts based on name similarity, allowing for a fast app setup. Additionally, you can sync images automatically, manually on demand, or on a schedule of your choosing. You can even tint images before setting them as contact images. Lastly, the app provides an optional image history feature, allowing you to save previous contact images and revert back to them if desired.

Overall, CoSy - Contact Sync is a simple and effective app that performs its intended function well. However, it is limited to syncing Facebook profile images with local phone contacts, and only works with certain contact sources.