Another idea might be Skritter. CPOD and Skritter were linked in the past, but are separate now. Fiona, a past CPOD host, is there now and does YouTube videos for Skritter and they’re all about Chinese characters.
Skritter has hundreds of the radicals in neat lists of 30. They include a flashcard app and each characters history is detailed. You can do their intro offer and download radical lists to your account and, if you chose not to continue with Skritter, the whole deal would be free and you could continue to study with them. Skritter’s Android app is a serious memory hog, but it has a cool character writing app.
I use the CPOD Android flashcard app almost daily. If you want to make your own list for Pleco, which CPOD links from its own app, here is a cool link. All the radicals are there ready to download, Apple and Android. Pleco Forums