not that I know of
there are basic PWM tests, photo closeups, and waving the light, and shining it at water in the shower
there is also an app, but I have not found it to produce any useful info, for me… Maukka has had better results: Very informative youtube review of UTorch UT02 - #4 by maukka
Here is another thread about the Flicker app
The way I can get some idea of Flicker is by extreme closeup of the LED
LAD:
Zebra:
but those photos dont mean the flicker is visible in actual use
I also test by waving the light. Neither of the above lights show dots when waved.
Maukka is the only one I know of that has complete details about Flicker, here is a post of his about a Zebra, I dont have one for a Manker