Yes—there are a couple of workable options mentioned.

For a Canon-supported approach, you can connect the 6D over Wi-Fi to a laptop and use Canon EOS Utility, which can handle timer-based remote shooting. This can be done through a Wi-Fi router, an ad-hoc network, or even by connecting both camera and laptop through a phone hotspot.

If you specifically want a mobile solution, one community suggestion was DSLR Controller for Android.

Another option for built-in time-lapse control is Magic Lantern, which adds interval/timelapse features directly in-camera. However, it’s unofficial third-party firmware, so use it carefully and only if you’re comfortable with that kind of modification.

So in short: the EOS Remote app itself may be too limited, but EOS Utility on a laptop, an Android app like DSLR Controller, or Magic Lantern are possible ways to do interval shooting with the 6D.