STOP and INSTALL Google Text-to-speech (https://play.google.com/store/apps/details?id=com.google.android.tts) or any quality TTS before complaining about your default TTS.
Learn how to write words for kindergarteners. In handwriting mode (experimental), you can write answers instead of pressing buttons. Click on words to hear sounds. You can review incorrect spellings. Review algorithm is based on latest memory retention technologies. This is an ad-supported version. Network connection required.
Please also try our paid version at https://play.google.com/store/apps/details?id=com.rioneutron.spellingk
This is one of the Spelling K-12 series from Spelling Kindergarten to Spelling 12th Grade. All your test results are captured and analyzed for your best memory retention. There are total 6 color codes and words change colors based on your marks. By default, words are in black. If you keep getting a word incorrect, it will turn yellow, orange and finally red. If you get a word right, it will turn greener. 10 Words are grouped into a chapter. If you get all 10 words right, the chapter icon will get a check mark. In review chapter, all incorrectly spelled words will appear in priority order based on the latest memory retention technologies. If you don't have enough time, just go to the review chapter and the app will make sure that you spend the least amount of time and maximize memory retention on words. This app will help you learn words very efficiently and very effectively.