To add some context as to what the online Scott catalog *could* be, as opposed to just an app/web wrapper around unprintable pages, I'm going to post some content that I presented on a coin collecting board several years ago.
By way of background, Krause publications publishes the industry standard (in the U.S. at any rate) Catalog of World Coins in 5 volumes. Huge tomes, some of which dwarf the Scott catalogs in page count. Current pagecount of the 5 printed volumes is 7,848 pages.
Several years ago they started offering their "Numismaster" product, which is the online equivalent of their printed catalog, but in database format, not eBook. While you can subscribe to individual volumes, the best deal is their "All Access Pass" which gets you access to all 5 volumes, plus a Canadian coins guide and a special volume called "Unusual World Coins" which contains fantasy issues that while not legitimately issued, are collectible nonetheless and are frequently encountered in the marketplace.
The regular price of an annual subscription is $110 per year, but have historically had deals where you could subscribe for as little as $35 per year.
It is a website, but without the handicapping and lockdown that Amos Publishing inflicts upon its users. Note the increased feature set with respect to wantlists and collection portfolio, as well as the fact you can easily print things.
Downsides: (1) The search interface is clumsy, and despite mountainous feedback and testing suggestions, they have not updated it. Still, I have no problems using it on my iPad or Android cellphone. (2) Because it is a website, use requires an active internet connection; no offline use.
Here is the main search screen. The denominations become selectable as you select a country (or type one in):

Clicking the "Find My Coin" button then takes you to the general search results screen shown below. This is one of the problems I have with the product: even if I selected the denomination from the list on the prior page, it still treats ALL query results as partial matches, in this case showing all denominations that have "Rupie" in them rather than just Rupies.

From the above screen you can click the "View details link at right" and get the details on that KM#.

If you notice, on both the preceding screens there are either "Add to Want List" or "Add to Portfolio" links, which take you to screens like that shown below. Presumably you could use this to track your collection and pricing/value would be updated as updates to the Krause catalogs are made. I don't use this aspect of the product. Note that you can upload images of the items you add to your portfolio. It seems to be a (limited?) numismatic equivalent of EZ-Stamp or other stamp collection management software.

Also, unlike Amos, they offer a free sample guide and the ability to explore the features:
http://www.numismaster.com/ta/insid...ge=SignUpNow