I personally don't like to use dedicated apps. I've seen too many companies go out of business or drop support of their app then your stuck re-entering the data again.
What I ended up doing was making a normal office document for my binder. For the pages where things like birth certificates are in the physical binder I scan those then insert the scans into the doc. For the sensitive documents I keep those in a small truecrypt container and edslite can open that.

I used LibreOffice/Apache OpenOffice and Andropenoffice and opendocument viewer.

I used to use dropbox to transfer but have since moved to owncloud since it can sync more than just files.

I mentioned in one of the other threads that I've divided my binder into sections. I have a separate doc for each family member and the physical papers for each person are kept in report covers, this way I can take just one persons at a time to a doctor or school as needed. I then have a 5th doc for all the shared papers and one overall/toc/dr plan/goals document.

Each persons doc is divided into 4 sections:
1. Identity - items such as birth certificate, ss card, diploma, resume, etc (marriage license for the shared)
2. Health - Current meds, health insurance info, medical records
3. Wealth - Listing of all bank/credit/loan/401k/529/ira accounts, latest statement
4. Possessions - Deeds to land/house, vehicle titles, large items with serial numbers, etc.