I do native mobile apps for Android and backends in Django, and have experience in tying them together with RESTful apis. I can handled the full experience from backend to frontend, with knowledge in Python, Javascript and JQuery, HTML, CSS etc for the web and Java, C, C++ and graphics & layouts for Android.
Actually, in most cases 4G (LTE) data should use less energy per bit to transfer your data than 3G. This may not be true for some of the early radios released since they are not as mature as 3G chipsets yet. It'll also take some time until the networks start using all power saving features available. But when devices and networks mature a little 4G should in general be more efficient.
However, since you get faster speeds you tend to use more data, which of course will use up your battery faster as well. But if you'll use it the same way you do today you'll just get faster access and should see about the same battery life, so there's nothing to be afraid of.
Mostly working with Android and Django but also do frontend work with jquery and lately D3.js for visualizations. If by any chance anyone is interested in radio baseband receiver design I also have experience in that (mainly LTE), though I guess not many look for that here.
Check my profile for contact details and links to portfolio.
Parse.com looks interesting, but I'm a bit worried about trusting someone else with the whole server side backend. And since I already implemented a backend using Django it's not really needed for now.
I'll definitely do a website where you can see more details about your progress. There a leaderboard seems like a good idea. For example showing the user with best progress this week etc could be fun.
A children's version sounds very interesting. For now it's really focused on adult or young students studying Japanese as a foreign language. I'm not sure how big the market is for children learning Japanese as a foreign language, maybe it's bigger than I think?
I know there are some kanji apps for native Japanese speakers as well, though I'm not sure if they're any good. Some things would need to be changed to sell this app in that market. For example, what should the questions be? Maybe from words written in hiragana only, with an example sentence for ambiguous words, to writing the word with kanji? There are some things to think about there.
In-app purchases is something I've thought about as well. There are IAP for Android as well, though I'm not so familiar with them. Personally, it seems a little shady to use IAP, especially marketed towards children. But on the other hand, since it's an educational app maybe parents would consider it ok?
I'm not sure exactly what you mean, but you will be quizzed on the included vocab as well. For example, you'll get questions like "two (kanji)" where you answer 二, and questions like "February (n)" where the answer is 二月. Both kinds of questions are treaded the same.
However, all questions are from English to Japanese where you write the answer yourself. You won't be quizzed on the other direction (given the Japanese word, what does it mean). Does that answer your question? I'll see what I can do to make it clearer on the website.
Personally I've always found it important to use the characters in different words since that's how you will encounter them in real use, so I try to make that a big part of the quizzing.
I use Anki on a daily basis for kanji practice - what drew me to your app was obviously the handwriting recognition. My handwriting is notoriously poor in English, and I'd rather avoid repeating the mistakes I made when I learned written English growing up.
If you were to add support for practicing the readings as well, I would buy your app in a heartbeat. I'd like to avoid using 2 different apps on a regular basis for kanji practice.
That's right. For now it's only for the Japanese versions which in many cases are different, so it's not useful for anyone learning Chinese. I'd like to release a version (or several, both simplified and traditional) for that as well, but right now it's quite low on the priority list so don't expect it to be ready anytime soon.
I do native mobile apps for Android and backends in Django, and have experience in tying them together with RESTful apis. I can handled the full experience from backend to frontend, with knowledge in Python, Javascript and JQuery, HTML, CSS etc for the web and Java, C, C++ and graphics & layouts for Android.
Github: http://github.com/olofsj
Website & portfolio: http://www.tokotoko.se
Contact info in profile.