Since I (and also a few others) couldn't find a program that lets you practice conjugations in Japanese (here & here) I decided to write one myself. It took a bit longer than I thought but a promise is a promise.

As of today Conjugation Japanese is available on Android Market (& AppBrain etc.).
App is free but ad-supported, if you like it please rate it and maybe even write a short review.

It sports 10 most basic conjugations/forms and over 3000 words both verbs & adjectives (I tried to pick the easy/popular ones). There is basic info about each conjugation (sometimes very basic), some statistics and achievements.

Everyone interested (but without Android phone) in running this app on your PC please try to follow these instructions on how to install Android emulator and later follow these instructions on how to enable market for the emulator. Alternatively you can try using this. In the future maybe BlueStacks will be available.

Screens from the app:

Oh man, guess who else was going to write an app to study this? This guy!

Thank you for doing this and taking the work off my plate. After I play with it for a while, I'll review it here first so you can address any issues before I review it on the Market.

Ahh I've been meaning to login to thank you for this for a while. Im glad it contains pretty much all the regular conjugations and its a clean well done tool!

Im a bit sad you're not getting more love

Really like your app, thanks for sharing! I also like the basic info you wrote, helpful to help you remember! I hope you'll keep improving it, eg i'd like to see something like a 4-star difficulty level where you have to enter the answer via keyboard (multi-choice really helps too much in conjugating ~る-ending verbs in my opinion...) but even as it is now your software is already awesome!

Downloading it tonight to play with. Thank you so much!

I don't love the 'type it in' suggestion, (hate trying to type stuff in on the phone, especially on the train, riding in a car, etc), but I think that a "Flash Card" style implementation serves the same purpose.

If there was just a way to hide the multiple choice initially, with maybe a "show" button, it might be helpful.

Though, as it is now, it isn't *too* hard to avoid looking at the multiple choice until after you have fixed the answer in your mind.

Probably you're right, having to type everything would make the answering to a quiz part really slower, and it's easy to think at the right answer before looking at the possibilities.

It's just that in some cases with る-ending verbs, i think "whell, this seems a nice v1 verb! wait, there is no v1-style conjugation here! so it has to be a v5..." and it's really hard to miss the card on purpose even if i should

Sweet I'll be sure to use this, once I get an andriod phone

What I do in situations like that, for example with iKnow multiple choice, is to fail it if I don't know the answer before looking at the options, even if I figure out correctly After looking at them.

Basically, if I didn't get it right pre-multiple choice, then I didn't get it right, period.

But there are probably other schools of thought with respect to that, as well.