Official Letter Writer is an Android app developed by Art DS Apps that allows you to write business letters using ready-made templates. The app offers various categories of letter templates, including invoice, business proposal, business inquiry, appointment letter, contract cancellation, bid proposal, offer letter, thank you, and performance approval.

With Official Letter Writer, you can easily edit any portion of the template to suit your specific needs. Additionally, you can create your own company logo to add to the letterhead and save/share letters in PDF format. The app also allows you to create different profiles to directly add details.

Overall, Official Letter Writer is a valuable tool for those who need to write business letters on the go. With its user-friendly interface and convenient features, this app is a must-have for any business professional who wants to save time and effort in writing letters.