Auction Sniper for eBay is a full version iPhone app developed by Picture Engine Company Inc. It falls under the category of Business & Productivity and offers four different modes of use.

The first mode is designed for Macintosh computer users who have the companion Mac app. This mode allows the app to run tasks in the background, automatically finishing the snipe for the user. To use this mode, users need to have the Auction Sniper app, iCloud turned on, and the companion Mac app available in the Mac App Store. All snipes are shared through iCloud between the two companion apps.

The second mode is for users who have an old iPod touch, iPad, or iPhone (iOS 8 or better) and want to set up a dedicated Sniper-server for automatic sniping. By installing the app on the old device and adjusting the settings, users can keep the device always on with the Sniper App running in the foreground, allowing it to act as a Sniper-server.

The third mode is for users who want to receive alerts to remind them to bring the app into the foreground for sniping. The app automatically sets two alerts: one about an hour before the end of the auction and another about two minutes before. Users can follow the steps in the app to set up their snipe and receive these alerts.

The fourth mode is for users who prefer to enter the bid personally at the last moment. This mode allows users to set up to three alerts at a time, which can be added to their calendar for easy access. The app also saves a link back to the listing with each alert for immediate action.

Overall, Auction Sniper for eBay offers a range of modes to cater to different user preferences and needs. Setting up a snipe in any of the modes is easy and seamless.