RESTful API for own python application

[Julio F Schwarzbeck]

Howdy folks, I have a couple of questions that imo requires some 
feedback by the smarts, I'd appreciate any comments you can add to this 
issue, here's my situation:

I am developing an application, the application stores small text 
snippets (think of something similar to evernote), and it has the 
standard CRUD operations of any other application.

Now my question is, how much would you recommend creating the entire 
CRUD operations as a REST API even for my own program, I plan to have a 
"thin" web client UI to make these operations,  but I am thinking about 
creating another client for ubuntu and its phone, for instance, and 
possibly connections from other clients.

Under the scenario above, I think it makes sense, but what about other 
applications that I have created in which the the back-end does not talk 
to anyone except the actual app and may or may not expose resources 
externally, would it make sense to 'standardize' in my CRUD operations 
for all my existing applications (forum system, q/a web app, ticketing 
system, and several others).

Thanks in advance from your responses.

JulioS