Two of the most expensive apps are Auria and Gadget at about 40 EUR each. Auria has many plugin IAPs, with an average proce of 20-30EUR/piece. Gadget has a coup

Two of the most expensive apps are Auria and Gadget at about 40 EUR each. Auria has many plugin IAPs, with an average proce of 20-30EUR/piece. Gadget has a couple at 15 EUR/piece, but one can also buy other Korg apps for 15-30 EUR + IAP and integrate them into Gadget. Auria also had an upgrade which cost about 20-30 EUR (can't remember). It's not unusual for people to pay more than 150 EUR for Auria. Decisions to buy are made based on the developer's reputation, reviews and discussions on forums.