I bought this for £35 too, £25 is a bargain. To be able to force a regeneration and keep your eye on soot levels it's perfect. Full module scan for 'faults', reset faults, Window close on button press, tear drop wipe, all sorts of additions it really is an entry level mini VCDS device. Sign up for the Beta version, remember to open your bonnet for full functionality. I coded my new Bosch battery with this, great piece of kit for the money, just remember to unplug it once you've finished playing 'cos it will suck your starter battery! Point of note, I changed the pretty VW start up screen display to Gti, r-series, Gtd etc which then registers as a fault on scan, changed it back! Do it for £25, End of chat! Works well on my Android Samsung S10.
You'll need to sign up for a 30 day trial for £40 odd quid to play for a month which you can cancel before 30 days is up, I paid, its worth it for regen/soot levels alone.