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Syntronik versions
So, anyone tell me what are the differences between "Syntronik" and "Syntronik CS"?
From their website:
"Syntronik for iPhone/Pad is available in 2 versions that differs only by the number of instrumens included."
Is it enough? Well, not for me
What is included in first and second version and what is the difference between iaps - full, deluxe - it means nothing for me 
Syntronik CS
https://apps.apple.com/app/id1354924276?ign-mpt=uo=4
Syntronik
https://apps.apple.com/app/id1263088043?ign-mpt=uo=4
Comments
The one is “pay once” and the other is “pay forever” (subscription based) ???
CS is free and “modular” version of IK’s apps. It means custom shop. The only difference between the two is that when you buy the regular (non-CS) version, you get a core foundation of things unlocked in that app. If you download the CS, you still have the option to buy that core foundation, often at the same price. But if you want to skip it go with CS. I’ve done this with Amplitube where I’ve instead added IAP based on major amp “brands.”
Can’t comment on deluxe etc as I don’t own any Syntronik