Dumbbells count per hand, volume doubles
2.5 kg in each hand counts as 5 kg toward total volume. It sounds small — but get it wrong and your monthly numbers are wrong.
Strength training log
How much did you bench last time?
You can't remember, and that's normal — chest day was two weeks and three sessions ago. So you load 100 kg again, same as last time, same as the time before. Better remembers, and tells you the day you actually moved up.
Two months later, this is what it shows you
Barbell bench press
100 kg
105 kg
+5 kg
12 Jun → 9 Aug 2026 · heaviest set
Logging
Nobody wants to fill in a form mid-set
So last set's numbers are already there. Change one, and that's your next set. Six sets logged in under ten seconds on your phone.
Barbell bench press · today
160 kg × 12720 kg
280 kg × 10800 kg
3100 kg × 5500 kg
4
105 kg × 3PR
315 kg
Fill a whole session from an RM
Pick which rep-max you're working from and the sets you haven't done yet fill themselves in, instead of typing each one.
Apple Watch
Leave the phone in your bag
Pick today's session on your phone and send it to the watch. From there the whole workout — logging sets, heart rate, rest timer — happens on your wrist.
Add a set with a tap
Three buttons on the watch: finish this set, add a set, next exercise. Big enough to hit with gloves on.
Or use both together
Let the phone drive the session and the watch log only the current set. Switch between the two mid-workout.
Rest timer
You'll know when the 90 seconds are up
The countdown lives on your lock screen and in the Dynamic Island. It keeps running while you scroll, and warns you 3 seconds before your set. Double-tap to go straight into the next one.
Stats
A year in — what did you actually train?
Not "great job". How much more than last month, where it went, and which muscle group you've been quietly skipping.
July
10
Training days
216
Sets
59.1 t
Total volume
+23%
vs last month
This month was mostly squats and bench press, across 3 exercises.
Your body is in there too
Weight, body fat, and arm and leg measurements recorded left and right separately. Two months on, you can see whether the side you've been working actually grew.
Visible from your home screen
A widget lays a year of training density across your home screen. How long your streak is, without opening anything.
Better Pro
Logging your training is free, always
What you lifted is yours. Writing it down shouldn't cost anything, so it doesn't. Pro lifts the ceilings: build as many routines as you need, arrange supersets however you like, train on the watch whenever, and open up the deeper stats.
Monthly
Cancel anytime.
Yearly
Pay once, or spread it out.
Family
Share it with your household through Apple Family Sharing.
Prices and renewal terms are whatever the App Store shows you at purchase. See the Terms of Service.
Download
Start with today's first set
Sign in with Apple, WeChat, or your phone number. Your data follows the account.
iPhone and Apple Watch
Search the App Store for "Better健身日记". Requires iOS 17 or later.
WeChat Mini Program
Log a set without installing anything. Search WeChat for "Better健身日记", or scan the code.
Tap to enlarge,then scan in WeChat