Don't use apps bruh just pick the most effective core workouts then work them, but if you don't workout until you feel pain it's not gonna get you 6 pack

don't know bout that but I use an app called Fitvate and its been the best, I recommend you it

Just the workouts bicha 6 pack aysetuhm beteley borch kaleh ....

Youtube video arif arif alu ya arif new