Incline bench press question

In the app it has prescribed sets of incline bench press at 80% but it has it at 0lbs because you can’t put in your max for incline tho?

Are you using the android or iphone app? I use the android app and when it calls for incline at 80% its 80% of my regular bench press max. So when the program calls for 3x5 at 80% i usually pick a weight at about 8 RPE

Incline bench press, which is more like a incline shoulder press is not calculated from bench press max, rarther use the same philosophy as goodmornings etc. I.e. you choose a weight that is fitting for that day.