Apple kicked off its 25th annual Worldwide Developers Conference on Monday with a video that serves as a kind of love letter to developers.

In the nearly five-minute video, called "Apps We Can't Live Without," a series of random users are interviewed about their favorite apps and what they think about the developers behind them.

"They make our lives better," one woman says to the camera. "And they think of things that obviously regular people can't think of."

Some of the apps highlighted in the video are big names that most users know about, including Instagram, Tumblr, Pinterest and Airbnb. An architect praises FiftyThree's Paper app, while one woman says Airbnb "saved my life."

The video then moves on to several niche apps that get less attention. An ocean advocate discusses the usefulness of Marine Debris Tracker, and a student praises Biosim, an app that works with his bionic hand.

Overall, the video is a powerful reminder of the wide range of apps that have popped up in the last six years — and the equally wide range of people whose lives are impacted by them.