Yazım Kuralları is a free Android application developed by Barasfe Apps that provides a comprehensive guide on Turkish spelling rules. The app is based on the resources provided by TDK and offers up-to-date information on spelling rules. It covers a wide range of topics, including separate written united words, verb conjugation, punctuation, and more.

The app is structured under various headings such as the spelling of reinforcement words, spelling of verb oct, spelling of incoming attachments, verb conjugation and related spellings, availability of the spelling, and more. It also includes a list of abbreviations, a quote of the words spelling, consonants derivation, and famous contractions.

With its easy-to-use interface and well-organized structure, Yazım Kuralları is a useful tool for anyone looking to improve their Turkish spelling skills. It's a must-have app for students, writers, and anyone who wants to write in Turkish with confidence.