what's a good dinasaur encyclopaedia app for Android?
Moment of silence for nobody replying to you
Anyways there's one that can be used offline that I really like called "Paleontologas". It tells you about pretty much life in all of the periods on Earth from the Hadean period all the way to the future.
There's also quizzes in this app to exercise your knowledge. I've learned lots about animals I never knew existed such as the Desmatosuchus.
More on reddit.comAre there resources for identifying dinosaur tracks? - The Great Outdoors Stack Exchange
Made an app about dinosaurs.
Does anyone know any good dinosaur mobile games?
Videos
What's a nice place to scroll on your phone to replace physical encyclopedias? Somthing like a dinasaur visual guide perhaps?
There are resources, but be aware that it is rather difficult to get a definitive answer.
Here is a digital book published by the Earth Sciences department of the University of Bristol with a section on identifying track makers: http://palaeo.gly.bris.ac.uk/Palaeofiles/Tracks/default.html
Here's a page at the UC Berkeley Museum of Paleontology, and notice specifically the section near the bottom on identifying tracks: http://www.ucmp.berkeley.edu/science/trackways/trackways4.php
Here's a page on the Smithsonian site about identifying dinosaur fossils, with a section dedicated to tracks: https://naturalhistory.si.edu/exhibits/backyard-dinosaurs/faq.cfm
In all of these, you'll notice a trend that identification can be extremely difficult. The reason for this is because we are having to extrapolate from a skeleton what a complete foot would have looked like, in addition to the fact that dinosaur tracks are rarely perfect molds. However, there is ongoing research into modeling the tracks of extant species with respect to their skeletons, and a lot of headway has been made using this technique.
Are there resources for identifying dinosaur tracks?
No;
Dinosaur tracks are called trace fossils
Trace fossils are classified in various ways for different purposes. Traces can be classified taxonomically (by morphology), ethologically (by behavior), and toponomically, that is, according to their relationship to the surrounding sedimentary layers. Except in the rare cases where the original maker of a trace fossil can be identified with confidence, phylogenetic classification of trace fossils is an unreasonable proposition. Source
The two Wikipedia articles linked above, make for interesting reading, but the short answer to your question is, no there is no resource categorizing them, as in most cases there is no evidence indicating what animal actually left the prints.
The study of dinosaur tracks is included in Paleoichnology which covers all the trace fossil types. It would seem the best reference would be an Ichnology text book, I googled around and did not find anything was freely available and looked like it would work as a reference.
There are a few dinosaur tracks that are identifiable. There are even some parks like Dinosaur Valley State Park where a few types of tracks can be viewed, with very clear references for a very limited number of species. I do not believe these qualify as "resource" as the OP seems be looking for more of a field guide for identifying tracks (Trace Fossils) found in non-developed areas.