Does Harvest cost money?
Harvest is completely free to use for now while we iterate on the features. There will always be a free version, but servers cost money and we don't want to spam you with ads. Expect the paid version to be about a cup of coffee and well worth the additional functionality.
How does Harvest work?
It's a cycle of Capture --> Learn --> Share --> and back again. When you are browsing or reading something, use Harvest to highlight or write any notes, and it will automatically save your note with related context like the date, source url, and any tags that you add related to the content. You will then start getting email reminders of your note on a spaced repetition schedule to help you optimally learn and remember. Discover notes from others (and share your own!) to learn them for yourself. The more people re-save your own content, the more Harvest reputation you get.
What is spaced repetition?
Spaced repetition is a learning method. The theory is that repeated exposure over increasing intervals of time can help retain information much better than simply seeing something once the first time. Specifically, spaced repetition uses our memory capabilities to optimize for just-in-time learning; just as we are about to forget something, it will resurface the content to help us remember.
How does Harvest use spaced repetition?
Harvest uses a modified version of the original SuperMemo algorithm based off of the original Optimization of learning paper. Each time you save or add a note, Harvest creates a learning schedule of 5 notifications of increasing intervals to help you learn and remember the content. We currently only use email as the method of delivery but other notification types are in the works.