SparkFiles strength is in the simplicity of his idea. Idea born from an article on the internet many years ago. As soon as you have an idea or a thought, open the app and write it (with at least one hashtag). Repeat the operation every time you have a thought or an idea.
The search, through hashtag, allows you to recover your ideas. By observing the evolution of your thought over time you could find the common thread to develop it and make it concrete.
Finally you can look at the statistics of how many thoughts and hashtags you wrote in addition to backing up your iCloud.
Sorry for English (thanks Google Translate) and if you want to help me to evolve the app write me with tips and ideas; thank you!