Ultra-thin Colmi C28 smartwatches in an elegant silver color combine a 1.93" AMOLED HD display, Bluetooth calling, more than 100 sport modes, and advanced health tracking (heart rate, SpO2, stress, sleep). With a 230 mAh battery, they last about 4–7 days, and with the Da GPT AI assistant you get quick answers right on your wrist.
Large 1.93" AMOLED display in a slim body
Enjoy a 1.93" AMOLED HD display with 368 × 448 px resolution for a sharp image and comfortable control. The ultra-thin case with a thickness of 7 mm sits great on your wrist at work and during sports.
Health features and sleep tracking
The watch provides continuous heart-rate tracking, SpO2 measurement, and stress level monitoring. It also includes AI sleep analysis including sleep stages and daytime naps, plus activity reminders for a more active day.
Bluetooth calling and smart notifications
Thanks to the built-in microphone and speaker, you can comfortably make calls via Bluetooth directly from the watch. You’ll also have notifications from selected apps at hand, so important messages won’t slip by even on the move.
Colmi C28 are stylish and exceptionally comfortable smartwatches with a slim body (only 7 mm) and a low weight of 39 g. The large 1.93" AMOLED display with 368 × 448 px resolution delivers vivid colors, fine details, and excellent readability during the day and in the evening.
A practical advantage is Bluetooth calling—thanks to the built-in microphone and speaker, you can handle calls directly from the watch. There’s also the Da GPT AI assistant for quick questions and everyday support without constantly reaching for your phone.
The watch supports a wide range of training and daily health features:
- Heart-rate monitoring, SpO2 (blood oxygen saturation), stress, and sleep analysis (including naps)
- More than 100 sport modes and clear activity records
- App notifications and watch-face customization (including your own photo)
- 1 ATM water resistance and IP6X dust protection for everyday use
- 230 mAh battery with about 4–7 days of use and magnetic charging (about 2–2.5 hours)
Package contents: smartwatch, 2-pin magnetic charging cable, user manual.
Specifications
- Manufacturer
- Colmi
- Model
- C28
- Color
- Silver
- 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 mounting
- Full lamination 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
- Silicone
- 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 run, 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 training, 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, billiards, 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, car racing, athletics, sailing, water polo, other water sports, paddleboarding, water skiing, kayaking, rafting, rowing, motorboats, fin swimming, diving, synchronized swimming, snorkeling, kitesurfing, open-water swimming
