packaging - How to version the PPA package for a new application?

I have a PPA set up to allow an application that I wrote to be installed by others. Currently, I have no plans for the application to be included in the official Ubuntu or Debian repos.

I recently created the packages for the initial version (1.0) of the application for each of the following Ubuntu releases: precise, trusty and vivid. They're versioned like this:

1.0~1

where

is "trusty", "precise" or "vivid".

Will this versioning work so that I can later make updates available to my users or do I need to change it to something else? For what it's worth, I'm using source format, "3.0 (native)" which may or may not be appropriate in my case... Overall, packaging for upload to PPAs has always been an area of considerable confusion for me and I'm hoping to get a better handle on how this ought to be done. I appreciate any and all help!

TL;DR Yes, your versioning would work.

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A short copy and paste from Building a source package – Versioning

Versioning

Ubuntu package names are suffixed by the version number of the
package. This allows Ubuntu to distinguish newer packages from older
ones and so remain up to date.

If you're creating an alternative version of a package already
available in Ubuntu's repositories, you should ensure that:

your package supersedes the official Ubuntu version
future Ubuntu versions will supersede your package. 

To do this, add the suffix ppan (where n is your package's revision
number). Two examples:

Ubuntu package myapp_1.0-1 → PPA package myapp_1.0-1ppa1

Ubuntu package myapp_1.0-1ubuntu3 → PPA package myapp_1.0-1ubuntu3ppa1 

Version numbers must be unique. This has implications if you want to
provide packages for multiple Ubuntu series at once:

If your package can be used on different versions of Ubuntu without
being recompiled then use the naming scheme already described. When

you have successfully uploaded your package to your PPA you can copy
the existing binaries to the new series; see Copying packages.

If your package does need to be recompiled to support multiple Ubuntu
series, then you should add a suffix of a tilde and the series name to
the version number. So a package for the Intrepid Ibex could be named
myapp_1.0-1ubuntu3ppa1~intrepid1 and for the Hardy Heron
myapp_1.0-1ubuntu3ppa1~hardy1. If you need to release an updated
package, increment the ppan suffix. It is important to note that
specifying the version name here doesn't change the series that you

are targeting; this must still be set correctly as described in the
Ubuntu packaging guide's section on the changelog file.