haplo /apps/cinder
cinder/screens · straight from the App Store
See it running
plays on its own · hover to pause · drag to scrub →
cinder/features
Everything a session needs, and nothing else
Log fast, see the trend, and let the Watch and Apple Health do the rest.
logging
Log a set in seconds
Tap reps and weight and move on. Lifting, cardio, rowing and bodyweight all live in the same log — no spreadsheet, no fiddling between sets.
🏋️ Bench Press
set 3 / 4
8
×
185
reps lbs
volume today
14,800 lbs
SET 1 8 × 185
SET 2 8 × 185
SET 3 8 × 185
SET 4 —
progress
Proof that it is working
Your heaviest set per session plotted over time, so a good month is something you can point at rather than something you feel.
bench · heaviest set
+18% in 12 weeks
w1 w3 w5 w7 w9 w11
apple watch
Start it from your wrist
A full Watch app and a Live Activity on the Lock Screen — your phone can stay in the bag.
live activity
⚡ no phone needed
ai chat
Ask your own history
The chat can see every session you have logged, so the answers are about you.
What’s my bench PR?
225 lbs, three weeks ago.
insights
Biological age
VO₂ max, resting heart rate, HRV, sleep and daily movement, resolved into one number that actually moves.
27.4
estimated age
6.6 years younger
Pace of aging
0.86×
Slow Fast
0.6× 1.0× 1.4×
coverage
Know what today actually hit
Every logged set maps to the muscles it worked, so the group you have been quietly skipping stops being a surprise.
your home tab
It lands where you already look
Workouts write straight to Apple Health, and the home tab is yours to arrange — fifteen widgets for streaks, PRs, volume and the rest.
🔥 12 day streak 225 lb bench pr 27.4 biological age 💪 Muscle coverage what this week actually hit +18% volume
Not medical advice. Haplo, LLC is not a healthcare provider. Training plans,
workout suggestions, recovery and strain estimates, and AI training chat responses are
informational only and are generated automatically without clinical review.
Consult a physician before starting or changing an exercise program — especially if you are
pregnant, have a medical condition or injury, take medication, or have been inactive. Stop and seek
medical attention if you feel pain, dizziness, or shortness of breath. Exercise carries an inherent
risk of serious injury, and you assume that risk when you use these features. Sensor-derived
metrics are estimates, are not medical-grade, and must not be used to diagnose or treat any
condition. See Terms & Conditions , Section 14.
cinder/changelog · latest entry
What's new
read the full notes ↓
cinder/reviews · unedited, from the App Store
What people say
★★★★★
“Helps me plan and track my workouts so I can reach my fitness goals!!”
lcassoutt
★★★★★
“Been using this to log my sets and I love it! The ai insights are also super helpful and I love that I can pick which model I use. The run animation is also super cool!”
Ecass13
Haplo
