How do they avoid lock-in? The site makes no mention of the concept whatsoever, and I don't see anything about an ability to export, in a non-bespoke form, all the data you've painstakingly collected in Findings.
We definitely want to make sure you can always export your data. At this stage, you have of course to take our word for it, since we do not have export working yet. However, we also have a section in our intial user guide about the format used to store those documents. It is SQLite-based, and is a simple key-value store (using the open-source PARStore implementation). Also, it's not store "in the cloud", it is on your local hard drive, and you can easily get to that library via the preferences of the app.
Looks like they'll be adding export soon: "Can I print, export, share an experiment or a protocol? The initial version of Findings has not implemented these features, but it is coming very soon. Most of the implementation is ready, but it requires a bit more work for integration, and it was not done on time for the 1.0 release. Our apologies for the delay! But please let us know what you need, so we'll do our best to include it."