Progress you can't see is progress you'll stop making. Plank King keeps three records for you without any manual input: a training calendar, running totals, and your personal bests.
If you open the stats before you've trained, the app will tell you plainly: "You don't have training data yet, go to do a few planks." Fair enough — do a set first, then come back to this guide.
Steps and screenshots verified against app version: 26.4.27
1Check the calendar for your training days
The calendar view marks every day you completed planks, month by month. Gaps are information too: a glance tells you whether you're actually consistent or just remember the good weeks.
2Read your totals and longest record
The stats show your total plank count and your records over time. The total is the motivation number — it only ever goes up. The longest hold is the progress number — when it moves, your core actually got stronger.
3Turn on Apple Health sync
Plank King integrates with Apple Health, so your plank workouts can sit alongside everything else you track. Grant Health access when the app asks; you can manage the permission later in the iPhone's Health settings.
4Know what manual entries do — and don't do
Forgot your phone during a set? You can add planks manually and they'll count in your calendar and totals. The one thing they won't do is reach the Game Center leaderboard — only sensor- or timer-detected sessions sync there.
Check the calendar once a week, not once an hour. The useful signal is the pattern over weeks — training days filling in, the longest hold inching up — not any single day's number.