How to Count Reps Automatically on iPhone (No Wearable)
Use your iPhone camera and on-device AI to count reps automatically — no Apple Watch or band required.
Count reps automatically on iPhone using the camera and on-device AI. A step-by-step guide to setting up automatic rep counting, positioning your phone, and getting accurate counts for squats, bench press, deadlifts and 50+ exercises.
Counting reps in your head breaks your focus and it's easy to lose track mid-set. Wearables can log heart rate, but most can't reliably count barbell or bodyweight reps. The most accurate no-wearable method is to use your iPhone camera: point it at yourself, and on-device computer vision watches your movement and counts each rep in real time.
This guide walks through exactly how to count reps automatically on an iPhone using Spotwell — where to place the phone, which exercises work, and how to get the most accurate counts. Everything runs on-device, so your video never leaves your phone.
Step-by-Step Guide
From download to your first auto-counted set takes about two minutes:
1
Download Spotwell
Download Spotwell from the App Store. It's the best AI rep counter app for iPhone with high accuracy.
2
Open Workout Tracker
Open Spotwell and navigate to the workout tracker. Select 'Start Workout' to begin tracking.
3
Select Your Exercise
Choose the exercise you're performing (squat, bench press, deadlift, etc.). The AI is trained on 50+ exercises.
4
Position Your iPhone
Position your iPhone so it can see you during the exercise. Place it on a bench, tripod, or have someone hold it. Make sure you're fully visible in the frame.
5
Start Your Set
Tap 'Start Set' and begin your exercise. The AI will automatically detect and count each repetition in real-time.
6
Review Rep Count
After your set, review the rep count. The AI displays the number of reps counted. You can manually adjust if needed.
7
Continue Tracking
Move to your next set or exercise. The AI continues tracking automatically. All your reps are logged to your workout.
Exercises Included
Squats
Sets: Any
Reps: Auto-counted
Rest: Tracked
AI automatically counts squat reps with high accuracy. Works with back squats, front squats, and goblet squats.
Bench Press
Sets: Any
Reps: Auto-counted
Rest: Tracked
Count bench press reps automatically. The AI tracks bar movement from chest to lockout.
Deadlifts
Sets: Any
Reps: Auto-counted
Rest: Tracked
Automatic deadlift rep counting. Works with conventional and sumo deadlifts.
Pro Tips
Position your iPhone at a 45-degree angle for best results - this gives the AI the best view of your movements.
Ensure good lighting - the AI works better in well-lit environments.
Keep your entire body in frame - the AI needs to see your full range of motion.
The AI learns your movements - accuracy improves over time as it learns your form.
Works with any exercise - the AI recognizes movement patterns for 50+ exercises.
Frequently Asked Questions
Can an iPhone count reps automatically without a wearable?
Yes. An iPhone's camera plus on-device pose detection can count reps without any Apple Watch, band, or sensor. You prop the phone up so it can see you, and the AI counts each repetition by tracking your body's movement through the exercise.
How accurate is AI rep counting on iPhone?
For clearly visible, full-range movements in decent lighting, camera-based rep counting is typically accurate to within a rep or two per set. Accuracy is highest when your whole body is in frame at roughly a 45-degree angle; partial reps and very fast tempos are the main sources of miscounts, and you can adjust the count manually after any set.
Which exercises can be counted automatically?
Compound and bodyweight movements with a clear up/down or extension pattern count best — squats, bench press, deadlifts, overhead press, push-ups, lunges, rows and curls. Spotwell recognizes movement patterns for 50+ exercises.
Does automatic rep counting drain the battery or upload my video?
It runs on-device, so your camera feed is processed locally and is not uploaded or stored on a server. Because it uses the camera during a set, expect similar battery use to recording a short video; between sets there is no ongoing drain.
Where should I place my phone to count reps?
Prop the phone on a bench, plate, or tripod about 6–10 feet away at roughly a 45-degree angle so your full range of motion is visible. Good lighting and keeping your whole body in frame produce the most reliable counts.