Mnemonics are a great way to learn hiragana, katakana, and even kanji. They're little stories you use to remember things that would otherwise need straight memorization. The Dr. Moku series has been around for a while, with their hiragana and katakana mnemonics, but their first foray in the world of kanji mnemonics has popped up in the app stores.
While it's still in its infancy, the app offers mnemonics to learn some basic radicals and 30 kanji with the use of original mnemonics and images. The kanji is presented with a simple mnemonic to teach the on'yomi or kun'yomi reading (or both) and the meaning. As you scroll, more dictionary-style information is listed, including meanings in English, as well as a few other European languages, grade levels, JLPT ranking, frequency, etc. You can choose to hide any of this information in your settings, which is important, because you don't want to try to stuff all of that info into your brain at once. On top of the first 30 kanji the app offers, you can purchase something called the "Kanji Package 1 - JLPT5" in the Store tab. This contains "Over 75+ new Kanji Mnemonics including the entire JLPT 5 set." However, that's the extent of the current content. The price point is a bit high for what is basically a flash card app, but all the content other than the mnemonic pictures is included for free. So you can still use it without spending any of that precious cashola.
On top of the first 30 kanji the app offers, you can purchase something called the "Kanji Package 1 - JLPT5" in the Store tab. This contains "Over 75+ new Kanji Mnemonics including the entire JLPT 5 set." However, that's the extent of the current content. The price point is a bit high for what is basically a flash card app, but all the content other than the mnemonic pictures is included for free. So you can still use it without spending any of that precious cashola.