Elegant and ultra-thin COLMI C28 smartwatches combine a 1.93” AMOLED HD display, Bluetooth calling, the Da GPT AI assistant, and health monitoring with a battery life of up to 5–7 days. They’re great for everyday wear, sports, and work — with a stylish silver case and a brown leather strap.
Large AMOLED display for perfect readability
Enjoy a 1.93” AMOLED with a 368 × 448 px resolution, delivering vivid colors, fine details, and comfortable control. Great watch-face selection helps match the watch’s look to your style.
Bluetooth calls right from your wrist
Thanks to the built-in speaker and microphone, you can answer and make calls via Bluetooth without taking out your phone. Ideal at work, on a walk, and during training.
Elegant, thin, and comfortable design
The ultra-thin case with a thickness of 7 mm looks modern and feels very comfortable on the wrist. The silver metal body is complemented by a brown leather strap with prominent stitching for a stylish look in the city and at the office.
COLMI C28 are designed for comfort and performance: with a thickness of just 7 mm and a large AMOLED display, you have all important data clearly visible on your wrist. They support Bluetooth calling, show app notifications, and offer wide options for watch-face personalization.
The watch helps you take care of your health and fitness — tracking heart rate, SpO2, stress, and sleep (including daytime naps). For athletes, there are 100+ sports modes and clear activity logs. 1 ATM and IP6X resistance are suitable for everyday use, while the 230 mAh battery lasts several days without charging.
Main benefits:
- 1.93” AMOLED (368 × 448 px) with a high screen-to-body ratio
- Da GPT AI assistant for quick questions and support throughout the day
- Bluetooth calling (microphone + speaker)
- Health monitoring: heart rate, SpO2, stress, sleep
- 100+ sports modes and activity tracking
- Battery life 4–7 days, magnetic charging approx. 2–2.5 h
- Replaceable strap width 20 mm
Specifications
- Manufacturer
- Colmi
- Model
- C28
- Color
- Silver + brown strap
- Main chipset
- JL7074
- Flash memory
- RAM: 316K, ROM: 128M
- Heart-rate sensor
- VC30F
- Bluetooth version
- 5.3
- Bluetooth range
- Approximately 10 m
- Display
- AMOLED
- Display size
- 1.93 inches
- Resolution
- 368 x 448 px
- Viewing angle
- 89 / 89 / 89 / 89
- Touchscreen type
- Full-screen
- Display material
- Glass
- Display bonding
- Full bonding with OCA
- Battery type
- Lithium polymer
- Battery capacity
- 230 mAh
- Protection chip
- Seiko Y1
- Charging method
- 2-pin magnetic cable
- Number of charging cycles
- More than 300
- Charging time
- Approximately 2–2.5 hours
- Operating time
- Approximately 4–7 days
- Standby time
- Approximately 20 days
- Speaker
- Yes
- Microphone
- Yes
- Case dimensions
- 46 x 40 x 7 mm
- Strap
- Leather
- Material
- Metal + iML
- Buttons
- 1 aluminum-alloy button
- Watch weight
- 39 g (with silicone strap)
- Strap width
- 20 mm
- Replaceable strap
- Yes
- Compatible systems
- Android 5.0 and newer, iOS 9.0 and newer, Harmony OS
- App
- COLMI Fit
- Water resistance
- 1 ATM
- Updates
- OTA
- Watch languages
- English, Simplified Chinese, Korean, German, French, Spanish, Arabic, Russian, Ukrainian, Italian, Portuguese, Polish, Bengali
- App languages
- English, Simplified Chinese, Traditional Chinese, German, French, Arabic, Czech, Greek, Spanish, Japanese, Persian, Italian, Korean, Polish, Portuguese, Russian, Finnish, Swedish, Thai, Hungarian, Slovak, Croatian, Albanian, Turkish, Ukrainian
- Workout modes
- Walking, running, cycling, jump rope, badminton, basketball, soccer, climbing, tennis, rugby, golf, yoga, workout, dance, baseball, elliptical trainer, stationary bike, custom workout, rowing machine, outdoor running, walking, kabaddi, mountaineering, skateboarding, roller skating, parkour, ATV, paragliding, triathlon, dumbbells, sit-ups, indoor walking, indoor running, stepper, stair climbing, stepper, core training, flexibility, pilates, gymnastics, stretching, strength, cross-training, aerobics, physical education, wall ball, barbell, deadlift, upper body, functional training, burpees, back, lower body, abs, HIIT, weightlifting, square dance, belly dance, ballet, Zumba, Latin dances, street dance, folk dances, jazz dance, boxing, wrestling, martial arts, tai chi, muay thai, judo, taekwondo, karate, kickboxing, fencing, kendo, bowling, cricket, volleyball, softball, hockey, table tennis, handball, squash, pétanque, badminton, beach soccer, beach volleyball, sepak takraw, skiing, skating, curling, other winter sports, snowmobile riding, ice hockey, bobsledding, sledding, archery, darts, tug of war, hula hoop, kite flying, horseback riding, frisbee, golf, equestrian sports, auto racing, athletics, yachting, water polo, other water sports, paddleboarding, water skiing, kayaking, rafting, rowing, motorboats, fin swimming, diving, synchronized swimming, snorkeling, kitesurfing, open-water swimming
