Ah.. glad you have named Carista... basically the
Obdeleven market splits into two the micropayment app market which Carista belongs to. It's a black box you have no control on what it's doing so it can hash up the cars
coding. So that's market one and why
Obdeleven put the micropayment apps in it to cover people who wanted click and play solutions but not doing
coding. Then the
coding one which is VCDS and it's associates. That's what
Obdeleven Pro which is the unlock license. That's now an annual payment but you can come out of it if you have all your
coding done and don't need the pro license.
Obdeleven is more portable than VCDS so if on holiday, no laptop you can investigate any errors and clear them down that the car may generate. ABS one on my last two week trip. Came in useful.
Carista and
Obdeleven app side are big on marketing so people get sold on these one click apps. There will be I reckon Black Friday deals... there always are so on the
Obdeleven site I reckon you might be able to pick up the Pro license cheap. You can mix and match where you get your
Obdeleven from. Amazon for speed and the Pro license key off their own website. Whatever is cheapest and deliveryfits in. I would not advise using one click apps. Stick to
coding via the
Obdeleven Pro or VCDS route.
If you look at the link I gave above it provides an overview of what you can do with the Pro. As said Atecas of that period and the Leon 3 has similar
coding options. I lifted some from Leon 3, others from
Ateca coding. It's the lights arrangement which will be different and Leon 3s never had panoramic roofs or motorised tailgates. At the time you had to look around for the specific model stuff.
Basically the crowd sourcing people that write the one click apps are trawling the boards to write the one click code. They may not have the car. Can't test. If
Obdeleven doesn't QA correctly then you are running an untested app with no control. If you are doing
coding yourself you just reverse what you have done. There is not a restore function... it's manual clicking. The secret is not to do too many changes and keep a cool head, screen shot the stages so you can work backwards if need be.