When on the charts page online, you can select what exercise you want the data to show.

But the list to select the exercise you want is scattered. Alphabetical would be much easier.  It’s hard to see which variations you have done. Easy hard med or just straight. I have made another suggestion to combine all the levels for an exercise. Easy, medium, hard straight all to get her not separate.

Instead of having options to select. Bicep curl, bicep curl easy, etc. 

put all the bicep data together.  Just bicep.

Problem 1:

Adjusting the bar weight too often

When I go between exercises with different equipment, I need to keep changing the bar weight in the calculator, eg Bench Press (Olympic bar), Hip Thrust (short bar), Barbell Curl (EZ Curl bar).

Have the calculator use the Min Weight or new Bar Weight per exercise.

Problem 2:

Can’t manually edit values higher than 45 lbs

A Smith Machine can be easily heavier than 45 lbs. Using Tap-To-Edit can’t put in a higher value, even if the Min Weight for that exercise is higher.

Problem 3:

It is possible to save plate weight counts and increments, but not bar weight.

Might be one way to address the above.

Being able to include warm down sets.

I use the Body Part Prioritization feature. It adds a chest exercise to the end of each workout. It seems to always be Diamond Push-Ups, no matter the Level in the Dr Muscle workouts. When I leveled up, I wanted to change the Prioritization exercise to rotate exercises like the A/B/C workouts do. 

I was trying to get some variation in the exercises. In part from some mild boredom, but I thought it might be nice to follow the philosophy of alternating through some separately tracked exercises targeting the same body part, like the rest of the exercises in the program.

My bell tone (for rest intervals) sounds the same as other people in my gym and It can be distracting. It would be nice if I could set it to a different tone.

Include a function in which you can pre-plan supplement consumption as matched to workout phases. Would be handy to be able to keep track of supplements within the app

Show a live / real time calorie burn on the app screen during workouts ….

I think you should pursue development of a bluetooth accelerometer band that straps to the bar/wrist/ankle. These mirror based home workout devices are getting popular, but they aren't great for those of us needing squat racks and legit weights. But they do a good job of using computer vision to provide feedback on form, range of motion and tempo. I originally thought using the cell phone for real-time video analysis was a good idea, until I realized 80-90% of the benefit would come with an accelerometer with much less hassle. You would strap the device to the bar/wrist/ankle and do the warmup set focusing on perfect form and tempo as usual. Then on the work sets the accelerometer would feedback to the app whether someone is maintaining form, tempo, and ROM. Interestingly enough with regard to RPE, many studies more accurately determine the optimal rep limit by instructing the lifter to attempt to maintain steady tempo and then determining at what point the rep slows beyond a threshold (e.g. 20% slower). The lifter doesn't have to estimate how many more reps they could've done. They would just go until the most recent rep crosses the tempo threshold and stop. And it could easily tell me to watch my tempo, form, or ROM during the set. Almost everyone uses headphones during the workout anyway. Feedback like, "You cheated that rep a bit. Get deep enough." When my reps start to slow noticeably. "OK it looks like you've got at least one more in you." "That was a great set. Let's rest a minute." I've thought a lot about how I would accomplish this, but frankly I'm neck deep in developing a couple other things, so have no desire to get into workout devices. But happy to discuss further if you'd like.