Ultra-thin Colmi C28 smartwatches in an elegant gold finish combine a 1.93" AMOLED HD display, Bluetooth calling, the Da GPT AI assistant, and health monitoring. With 100+ sports modes and battery life of up to 5–7 days, they are ideal for everyday wear, work, and training.
Stylish ultra-thin design
The watch body is about 7 mm thin and, thanks to its light weight of 39 g, it is comfortable to wear all day. The elegant metal case in a gold tone is complemented by a soft silicone strap that fits well on the wrist.
Large 1.93" AMOLED display with high resolution
The clear 1.93" AMOLED display with a resolution of 368 × 448 px delivers a bright, detailed picture. Thanks to the large viewing area, the time, notifications, and sports statistics are always easy to read.
Health, sports, and Bluetooth calls
The watch supports Bluetooth calling (microphone + speaker), heart-rate monitoring, SpO2, stress, and sleep analysis. For training, it offers 100+ sports modes and clear activity evaluation in the app.
Colmi C28 is designed for comfortable all-day wear—the case is only 7 mm thick and the watch weighs about 39 g. The large AMOLED display with a resolution of 368 × 448 px provides a sharp image and excellent readability in different lighting conditions. The elegant metal case in a rose-gold shade is complemented by a pleasant silicone strap.
Get quick help even without your phone thanks to the Da GPT AI assistant (based on ChatGPT). For everyday communication, you will appreciate Bluetooth calling with a built-in speaker and microphone. The watch also supports smart notifications from selected apps and lets you customize the watch face.
Main advantages and features:
- Bluetooth calls directly from your wrist (speaker + microphone)
- Health monitoring: heart rate, SpO2, stress, sleep analysis (including naps)
- 100+ sports modes and workout data tracking
- Durability for everyday use: water resistance 1 ATM and dust protection IP6X
- 230 mAh battery with endurance of about 4–7 days (standby up to about 20 days)
- Magnetic charging, full charge in about 2–2.5 hours
Package contents: smartwatch, magnetic charging cable, user manual.
Specifications
- Manufacturer
- Colmi
- Model
- C28
- Color
- Gold
- 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 charge 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
- Silicone
- Material
- Metal + iML
- Buttons
- 1 button made of aluminum alloy
- 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
- Training 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, rollerblading, 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, bobsleigh, sledding, archery, darts, tug of war, hula hoop, kite flying, horseback riding, frisbee, golf, equestrian sports, car 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
