Applying to 50 jobs a day is the wrong goal
"How many can it send?" is a common question about these tools. It is the wrong one.
Applying to roles that do not fit wastes your time and the employer's. What to measure instead, and how to improve it.
Replies per hundred
Positive employer replies per hundred applications you sent. That is the number worth watching.
Fewer, earlier, better worded
Fewer: check eligibility before applying. Earlier: do not leave a role you want until its deadline. Better worded: a resume that leads with what the posting asks for, in its own vocabulary, without inventing anything.
What a good day looks like
A pace that lets you check each application. A short look at what replied. One adjustment to your search.