Do you hate carrying extra stuff around? Go with an internal Trinket M0 mod.
Same as above but you don't know how to solder stuff or don't want to risk it? Use your smartphone with Rekado as a payload launcher, but keep in mind that your smartphone must support OTG for this.
Neither of the above options are available for you or don't mind carrying an extra dongle around? NS-Atmosphere is a good (while being still cheap) dongle, otherwise if you don't like it a member on GBATemp is selling his own custom-made SAMD Payload launchers in the trading area which seem to be high quality.