It's quite easy to install your own fonts in PicLab Studio for iOS.
Before installing a font, make sure you have a license to use it on another computer/device.
You can deliver .otf and .ttf font files to your device by email, Dropbox or any other way that you can get a file to your device.
As an example, send yourself an email with a font (in .otf or .ttf format) attached, or open a font file via Dropbox on your device. On the top right, tap on the iOS share icon (an upwards pointing arrow in a box) and then select "Copy to PicLab Studio."
Your font will now show up in the PicLab Studio font drawer!
Note: for the time being, rearranging or deleting your installed fonts isn't possible. We are working on an update with a font manager that will allow for this.