May 8, 2026. Morning to late evening.
A comprehensive prompt
It took me until 11:30 a.m. to write out the complete new prompt in Claude AI for the personal best tracker. This has become a comprehensive app. I only need the personal best tracker, but I’ve added a bunch of new features.
I asked it to add a Sessions tab with a calendar view. In the Add tab, you can click a toggle to add sessions. Rather than adding one exercise, you add an exercise set, and it bundles that into a body part. It shows a list of the sets in your session. You can delete or edit a set, and then save.
Once saved, you open the Sessions tab and a calendar shows icons of the body parts you trained that day. You can tap in to see what you recorded. You can also add cardio: how many minutes and how many calories burned.
Smaller requests in the same prompt
I changed the color theme so it follows a color swatch. All the confirm buttons used a green that was clashing with the theme color, and I wanted that fixed. I asked for a button in settings for a BMR score and showed it how to calculate the BMR. I added onboarding for age and sex. The weight history graph needs numbers on the axis; currently it just shows dots.
I don’t think I’m going to play around with it after this. It’s even more than I anticipated. I don’t want to add eating schedule features. That’s too much information for one app.
A target weight line
After lunch I ran another operation, not for bugs, but for functions I wanted to add. In the body mass index section you can now set a target weight, and it shows up on your weight history graph as a red line, so you can see how close you are to it.
By 1:35 p.m. I had gone through another $10 of Claude usage. I really need to stop spending money on it, but I like the features that I can keep creating. It’s addictive.
The database forgets
In the evening I added another $13 of usage. Now there was a problem with the database. It was remembering all my user configuration settings, and it recognized my personal bests, but not any programs or sessions.
Eventually I got it to work. There was a problem with the rules. The database and the sync worked, but if I uploaded new files, the rules would change. I think something in all my code is changing the rules.
App Features Log: May 8, 2026
- Sessions tab with a calendar of body parts trained each day
- Sets grouped into a session, with edit and delete
- Cardio logging by minutes and calories
- BMR score, with age and sex added to onboarding
- Axis numbers on the weight history graph
- Target weight shown as a red line on the graph
Photos from today
Read what happens next in the dev diary: the next entry.
Log your personal bests, plan your weekly routine and build a workout streak you will not want to break. Download the app on Google Play.
Diary Of A Mad Chaos is a daily diary written from March 1996 until today, of which individual books and book series have been created, namely “The Lost Years” an exploration of young, entwined love, the “Wubao In China (猎艳奇缘)” book series which provides an extensive comparative analysis of the cultural differences between Eastern and Western societies, and the book titled “Foreigner (华人)” an exploration of race relations in Australia.
