When comparing TextExpander vs Notational Velocity, the Slant community recommends Notational Velocity for most people. In the question“What are the best power user tools for macOS?” Notational Velocity is ranked 11th while TextExpander is ranked 55th. The most important reason people chose Notational Velocity is:
The interface is clean and unobtrusive.
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Pros
Pro Cross-platform
Pro Has an iOS app
Pro Simple and minimalistic
The interface is clean and unobtrusive.
Pro Free
Pro Syncs with SimpleNotes or Dropbox
Cons
Con Latest version only available on a monthly subscription
Con Naggy
TextExpander nags about subscribing to their mailing list, and giving it more access to private information such as Contacts.
Con Expensive
Currently a TextExpander license costs $35.
Con Limited iOS app
Con Feels a bit outdated
The last release was from 2011. Although due to its brilliant simplicity in doing what it's designed for, some might think there hasn't been any need for an update, as long as it still works with the newer OSs.