Birth of Telegram
Telegram for iOS was launched on August 14, 2013. The alpha version of Telegram for Android officially launched on October 20, 2013. It is an Open Sources.
Telegram is a messaging app with a focus on speed and security, it’s super-fast, simple and free. You can use Telegram on all your devices at the same time — your messages sync seamlessly across any number of your phones, tablets or computers. you can send messages, photos, videos and files of any type (doc, zip, mp3, etc), as well as create groups for up to 200,000 people or channels for broadcasting to unlimited audiences.
Telegram different from WhatsApp?
Unlike WhatsApp, Telegram is a cloud-based messenger with seamless sync. As a result, you can access your messages from several devices at once, including tablets and computers, and share an unlimited number of photos, videos and files (doc, zip, mp3, etc.) of up to 1,5 GB each. And if you don’t want to store all that data on your device, you can always keep it in the cloud.
You can use Telegram in Android, IOS , Windows, MAC and other proprietary OS.
Delete your Message
Yes. Previously, you could unsend your messages within 48 hours after sending them. As of Telegram 5.5, you can always delete any messages you sent or received in any one-on-one conversation (in groups, it’s still your own messages only). You can also clear the entire chat history on both ends. On Telegram, deleted messages do not leave a mark in the chat.