Callbot is an iPhone application developed by Jumping Rock Labs LLC that offers automated calling services. It allows users to create a group from their contacts and record personalized voice messages to be delivered to each contact. The app is free to download and offers the first 20 calls for free. Subsequent calls can be made at a cost of 99 cents for every additional 20 contacts. Billing is conveniently handled through the user's Apple account.

Using Callbot, users can leverage their own phone number on the recipient's caller ID. The app provides real-time management of call results, ensuring efficient communication with groups of contacts.