This is the first in a series of tutorials, written by Tyler Kirby, to introduce Classicists to the Classical Language Toolkit (CLTK), a set of tools that allow you to use the programming language Python in order to perform various tasks (e.g. lemmatization, scansion, word tokenization) on Greek and Latin texts.
SPQR (App Store link) is the swiss army knife of iOS apps for Latinists. It has a plethora of features that make it worth the price tag for any serious student of Latin. In fact, there are so many features, that this post will only cover the core ones in the full name: SPQR Latin Dictionary and Reader.
SPQR includes Lewis and Short. This seems pretty much the same as the Lewis and Short in Logeion (review of Logeion for iOS here). But SPQR also includes an English-to-Latin dictionary. Here are screenshots of the SPQR dictionaries.
App Store link: Logeion – The University of Chicago
Greek – LSJ, Middle Liddell, Autenrieth’s Homeric Lexicon, Slater’s Lexicon to Pindar
Greek can be entered as Unicode Greek; you need not (but may) include diacritics. You can also use transliteration, so that entering at least “mhn” will suggest “μῆνις” [edited to reflect Helma Dik’s helpful comment].
Latin – Lewis and Short, Lewis’s Elementary Latin Dictionary, Frieze-Dennison Vergil, etc.
Greek – LSJ (also Autenrieth’s Homeric Lexicon, experimentally)
Note that you must enter your search terms for Greek in BetaCode (manual here), but you can (and should, for most purposes) choose to have the output in Unicode.
Latin – Lewis and Short
Other dictionaries available for Arabic, Sumerian, etc.