I recently wrote about Workflow, an app for automating tasks in iOS. If you are one of those who like to post animated gifs, I have a very simple but useful workflow to share with you.
When run, it will let you choose images from your photo library and ask how long you want each to be shown. With that it creates an animated gif and opens the share sheet so you can do whatever you like with it.
If you have installed Workflow all you have to do is follow the link below to import the workflow. The workflow can be run from the Today view if you have enabled that.