I have an update which I have sent to Apple today that fixes the Note crashing issue after an upgrade to iOS 8. This happened due to a third-party library that I was using for translating speech to text. I have removed that third-party library from the next update and the crashing has gone away. Most devices now have Siri and are able to do speech to text natively. Also, the next update will require iOS 8 so most devices that support iOS 8 also support Siri.
As for the iCloud sync issue, Tap Forms uses an iCloud service called Documents & Data to sync between your devices. When a user upgrades to iOS 8, they have the option of upgrading their iCloud account to use iCloud Drive. iCloud Drive is a replacement for Documents & Data. When you choose this option, even once, Apple will do a one-time migration of your documents (including any files generated by Tap Forms), from Documents & Data over to iCloud Drive. They will also freeze syncing of your Documents & Data files on Mavericks and iOS 7 and earlier. This means that as soon as you upgrade to iCloud Drive, you will no longer be able to sync with the Mac versions of Tap Forms unless you're running the OS X 10.10 Yosemite beta.
Once OS X 10.10 Yosemite is available, sync will function again. Although you may need to logout of iCloud on all your devices and then log back in for it to start functioning properly.
You can read more about the iCloud sync issue from this TUAW article:
I'm very sorry for the crashing issue with the Notes field. I'm crossing my fingers for a speedy review process for this next update.