First off, I know some of you looooove "Kotoba!", which uses the WWWJDIC dictionary. I myself have used it for a long period of time. I agree that it has two good features:
1. It's free.
2. It's better than no Japanese dictionary at all.
To be fair, WWWJDIC is good for very specific unambiguous nouns (I would find it useful while doing my shopping), which is due only to the shear size of its dictionary. However, it is terrible when you actually want to learn how to express something in Japanese, or when you want to properly understand a Japanese sentence. This is because almost none of the entries contain any usage explanation. It's just not set up that way. You may think that this is not a big deal, because there are plenty of example sentences. While (again) these are better than nothing, the vast majority of these sentences contain completely unnatural Japanese. Most of the time they are essentially 1-to-1 translations of the corresponding English sentences, fit to comply with Japanese grammar rules. (You can usually recognize these sentences by noting the frequency of 私 for I/he, 私たち for we/us, あなた for you, 彼 for he/him, その for the, when the usually these words would be omitted). Simply put, translation is not that simple. Just because it follows Japanese grammar rules and would be generally understandable in one way or another to most Japanese people, that does not make it a good translation. I should also note that WWWJDIC is next to useless for English-to-Japanese translation.
Anyway, the point of this topic is just to let people know which apps out there use WWWJDIC and which don't, so they don't have to waste their time/money on finding out the hard way. I have only downloaded a few, so I'm hoping other users can contribute to this thread.
I also included a couple apps that use Eijiro, which is in a sense, the reverse of WWWJDIC, in that it is aimed at Japanese people, and only really works for English-to-Japanese translation (the dictionary can be found only freely at http://www.alc.co.jp/).
Apps that use WWWJDIC (blacklist)
- Kotoba! - It's free, so it's worth getting for translation of unambiguous nouns. (Any serious Japanese learner would be a fool to have it as their only dictionary, though.)
- Japanese - I downloaded this because people were saying this was the better-but-more costly version of Kotoba. It's just Kotoba with a different coat of paint. Dynamic linking between entries makes it a little better, but a WWWJDIC-based app can only get so good.
- WaEiWa - I saw some Japanese people using this app. (Aside from unambiguous nouns that I mentioned, WWWJDIC is even worse for Japanese learners of English than it is for us). At first glance, I thought it might have been OK. It seemed to have an English-to-Japanese dictionary, so it couldn't possibly have been a WWWJDIC app, right? Well, it does have one, but only because they "reverse-engineered" the Japanese-to-English dictionary, so it's useless. This app also has dynamically-linked entries.
- Japanese Flip - A simple flashcard application. Not as hampered as a dictionary would be by use of WWWJDIC, but still, it's nice to get nice concise meanings for flashcard words you don't know, which is where this application fails.
- iKanji Touch - A kanji-learning app. Use of WWWJDIC is a little more forgivable in this case, since it focuses on the meaning of characters, not words, and thus natural translation or usage explanation isn't so important.
- Japanese Flash - I haven't downloaded this, but I can see from the pictures on its iTunes store page that it uses WWWJDIC.
Apps that use Eijiro (semi-blacklist) (targeted at Japanese learners of English)
- iEijiro (all versions) - Not as good as the online site, in that you can't really search examples. I should also mention that instead giving dictionary updates as free software updates, you need to buy the next version of the app to get the updated dictionary. Nice...
- Eijiro Touch - Same as iEijiro, but I know at some stage the developer stopped supporting it and it disappeared from the store. Then it appeared again, I think.
Apps that don't use WWWJDIC or Eijiro (the possibly-good-list)
- The WISDOM English-Japanese, Japanese-English Dictionary - Targeted at Japanese people, but even so, this is currently the app I use most often. Word descriptions are broken down very well into their various meanings/usages. Features dynamically-linked entries.
- The Ultimate Japanese Phrasebook - Better than your typical phrasebook due to the shear number of phrases contained. Created by Kodansha, which is the company that makes great Japanese textbooks targeted at us. (I wish they would turn their J-E/E-J dictionary into an app already. I believe it would be better than anything else on the market.)
- Human Japanese - I only downloaded the lite version, because it seems to be a beginner app (please correct me if I'm wrong). This is basically a textbook in an app, but it has sounds included. Based on the demo, I believe this would be a useful tool for learning the language from near-scratch.
As mentioned above, contributions are appreciated.