COLMI C28 Silver Smartwatch

COLMI C28 Silver Smartwatch

The COLMI C28 is an ultra-slim smartwatch, measuring just 7 mm thick and weighing 39 g. It combines an elegant design with a range of everyday features, including the Da GPT AI assistant, Bluetooth calling, more than 100 sports modes and health monitoring. Its 1.93-inch AMOLED display has a resolution of 368 × 448 pixels. The 230 mAh battery provides approximately 4–7 days of operation, depending on use.

AI assistant

The ChatGPT-based Da GPT assistant provides AI support directly from the watch. Use it to get answers to questions, check information and access content-generation features without reaching for your phone.

Slim, lightweight design

The 7 mm-thick case and 39 g weight make the C28 comfortable to wear throughout the day. Its slim profile suits work, exercise and relaxation, while the zinc-alloy case has a glossy finish and a modern metallic appearance. The comfortable silicone strap fits securely on the wrist and is interchangeable.

AMOLED display

The 1.93-inch AMOLED display offers a resolution of 368 × 448 pixels and a 90% screen-to-body ratio. It provides a clear, detailed image and good visibility in bright daylight and low-light conditions. The full-screen touch interface is covered with glass and fitted using OCA.

Bluetooth calls and notifications

Make and answer calls directly from the watch using its built-in speaker and microphone. The C28 can also display notifications from apps such as WhatsApp, Facebook and TikTok, so you can check messages without taking out your phone. Customise the watch face with a preset design or your own photo.

Health and activity tracking

The watch supports 24-hour heart-rate monitoring, blood oxygen saturation and stress measurements. AI-powered sleep analysis covers sleep stages and daytime naps, helping you review your rest. A movement reminder encourages you to stay active throughout the day.

More than 100 training modes are available, including walking, running, cycling, badminton, yoga, strength training, swimming and many other indoor and outdoor activities. The watch records workout data to help you review your activity and track progress.

Battery and durability

The 230 mAh lithium-polymer battery provides approximately 4–7 days of operating time and up to 20 days on standby. Charging uses the supplied 2-pin magnetic cable and takes approximately 2–2.5 hours. The battery supports more than 300 charging cycles. The watch has 1 ATM water resistance and IP6X dust protection for everyday use, including workouts and rain.

Specifications

• Manufacturer: Colmi
• Model: C28
• Colour: Silver
• Main chipset: JL7074
• Memory: RAM 316K, ROM 128M
• Heart-rate sensor: VC30F
• Bluetooth: Version 5.3; range approximately 10 m
• Display: AMOLED, 1.93 inches, 368 × 448 pixels
• Viewing angles: 89 / 89 / 89 / 89
• Touch interface: Full-screen
• Screen material and fit: Glass; full fit with OCA
• Battery: Lithium-polymer, 230 mAh
• Protection chip: Seiko Y1
• Charging: 2-pin magnetic cable; approximately 2–2.5 hours
• Charging cycles: More than 300
• Operating time: Approximately 4–7 days
• Standby time: Approximately 20 days
• Speaker and microphone: Yes
• Case dimensions: 46 × 40 × 7 mm
• Strap: Silicone, 20 mm wide, interchangeable
• Materials: Metal + iML
• Button: 1 aluminium-alloy button
• Weight: 39 g with silicone strap
• Compatible systems: Android 5.0 and later, iOS 9.0 and later, HarmonyOS
• App: COLMI Fit
• Water resistance: 1 ATM
• Updates: OTA
• Watch languages: English, Simplified Chinese, Korean, German, French, Spanish, Arabic, Russian, Ukrainian, Italian, Portuguese, Polish and 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 and Ukrainian

Training modes

Walking, running, cycling, jumping rope, badminton, basketball, football, climbing, tennis, rugby, golf, yoga, workout, dancing, baseball, elliptical trainer, stationary bike, custom workout, rowing machine, outdoor running, kabaddi, rock climbing, skateboarding, rollerblading, parkour, ATV, paragliding, triathlon, dumbbells, sit-ups, indoor walking, indoor running, stepper, stair climbing, 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 dance, street dance, folk dance, 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, beach football, beach volleyball, sepak takraw, skiing, ice skating, curling, other winter sports, snowmobiling, ice hockey, bobsledding, luge, archery, darts, tug-of-war, hula hooping, kite flying, horseback riding, Frisbee, equestrian sports, car racing, track and field, sailing, water polo, other water sports, paddleboarding, water skiing, kayaking, rafting, rowing, motorboats, fin swimming, scuba diving, artistic swimming, snorkelling, kitesurfing and open-water swimming.

In the box

• Smartwatch
• Magnetic charging cable
• User manual