From site:
Make learning spelling fun with spelling games. SpellingCity.com has more than 35,000 spelling words and eight spelling games. A person says each word or sentence for your child to spell. There are thousands of spelling lists to choose from or create your own for your class’s or child’s weekly spelling quiz. After your child takes a test, you can print out a report, have you child retake the entire test, or get tested on only words they got wrong the first time.
Free registration is required to access the spelling games. Student tracking and other game features require paid membership. SpellingCity is also available as an app for Kindle Fire, iPad/iPhone and Android devices. You must pay a fee to access spelling lists on your mobile device that you create on the website.