Splashbox is an app that works by authorising a connection to your Dropbox. You get "Free (do whatever you want) hi-resolution photos. 10 new photos every 10 days," directly into your Dropbox folder. They are under the Creative Commons license and the quality and variety is really fantastic. I believe there is a waiting list at the moment due to the amount of data being transferred but it's so worth it.
Once the images have synced your account I recommended transferring them out onto your computer or an external hard drive since as they take up around 500mb. Don't worry, all new batches of images will still be downloaded straight to your Dropbox without you having to do a thing.
The app works with the images provided by Unsplash, you can take a look at the images here:
Sign up to the Dropbox app here:HTML Code:
And find out more about the service here:HTML Code: