IMO...don't follow up at all. But it really depends on the type of job you are applying for. All my hiring manager experience comes from Retail. We don't give AF if you call, email, send a letter, send a pigeon, ..you are just annoying us.
And also..more TBH...you should be applying for so many jobs you don't know who to keep up with.
This is just my experience - I spent 20 years in retail, 15 in retail management and when I wanted to get out of retail I made a bookmark of every city, county, utility, industrial, etc. job website within 30 miles of my home. Anything not retail. Everyday I made time to look at every job opportunity website in that bookmarks folder and apply for anything I thought I could do. Anything I thought I was qualified for. And anything I wanted even though I wasn't qualified for. I applied for any job I wanted regardless of qualifications.
I only went on a handful of interviews where I didn't get the job and I never followed up. Because why? They have my resume, they have all my qualifications, they have everything they need to make a decision on me. I'm not waiting on ABC Company to hire me. I'm out there applying for 10 more jobs, I'm setting up 5 more interviews.
I was already hired and had a start date at one company when another company called me for an interview and I took the interview because I didn't have a paycheck yet and wanted to see what they had to offer. I called Company A and said, "sorry, I got a better offer and I won't be starting Monday for you".
IMO...Don't waste your time following up. Apply for the job, do the interview, say thanks it was a real pleasure I look forward to hearing from you. THEN APPLY FOR 20 OTHER JOBS and don't look back. You don't owe them anything, they don't owe you anything. Your priority is YOURSELF. Get a job!