COLMI vs Xiaomi Smart Band: Which Budget Wearable Brand Wins in 2026?
Two brands dominate the sub-£45 fitness wearable market in the UK in 2026: COLMI and Xiaomi. Both offer impressive hardware at low prices, both have loyal user bases, and both are frequently recommended when budget-conscious buyers ask for smartwatch recommendations. But they take very different approaches to the market, and understanding those differences is essential to making the right choice for your specific needs.
This comparison covers every meaningful dimension: hardware, display quality, health tracking, GPS, app quality, smart features, battery life, and value for money — with specific model comparisons to give you the clearest possible picture.
Brand Background
Xiaomi and the Smart Band Range
Xiaomi is one of the world's largest consumer electronics companies, with annual revenue exceeding £300 billion and a product portfolio spanning smartphones, laptops, smart home devices, and wearables. The Xiaomi Smart Band series — currently at the Band 9 — has been one of the best-selling fitness trackers in the world since the Band 3 in 2018. Xiaomi's brand recognition, manufacturing scale, and distribution network give it advantages that smaller brands can't match: widely available in high street retailers, strong software update support, and a trusted brand name that reduces buyer risk perception.
Xiaomi's wearables use the Mi Fitness (formerly Zepp Life/Mi Fit) companion app, which is well-designed and regularly updated. The Band series sits at a lower price point than even the cheapest smartwatches, and Xiaomi also produces the Redmi Watch series that overlaps more directly with COLMI's smartwatch range.
COLMI
COLMI is a Chinese wearable specialist brand focused almost exclusively on smartwatches and smart rings at budget price points. Unlike Xiaomi, which has a vast product ecosystem, COLMI's entire focus is on wearable devices. This specialisation means COLMI invests its value proposition entirely in wearable hardware: putting AMOLED displays, GPS, 100+ sports modes, and comprehensive health sensors into devices at price points where competitors often use lower-quality components.
COLMI has a strong track record in UK and European e-commerce channels and has built significant organic customer loyalty through genuine hardware quality relative to price. The Da Fit companion app is less polished than Xiaomi's but functional and continuously improving.
Form Factor: Band vs Smartwatch
The most fundamental difference between the Xiaomi Smart Band series and COLMI's smartwatch lineup is form factor. The Xiaomi Band 9 is a fitness band — a narrow, lightweight band with a small vertical display. COLMI watches are full smartwatches with larger rectangular screens.
This distinction matters for several reasons:
- Display size and readability: A full smartwatch display (1.43 to 2.13 inches on COLMI models) presents significantly more information in a larger, more readable format than the Xiaomi Band's narrow display
- Watch face variety: Smartwatch faces replicate the visual language of conventional watches (analogue, digital, information-dense) in ways that fitness band displays cannot
- Notification readability: Longer text previews are possible on larger displays; the Xiaomi Band's narrow screen limits notification content
- Form factor preference: Some users prefer the slim, barely-there feel of a band; others prefer the conventional watch aesthetic of a smartwatch
For a fairer comparison, we'll look at the Xiaomi Redmi Watch 4 and Smart Band 9 Pro (which has a larger display than the standard Band 9) alongside COLMI smartwatches.
Display Quality Comparison
Xiaomi Smart Band 9 Pro
The Band 9 Pro features a 1.74-inch AMOLED display — larger than the standard Band 9 and approaching smartwatch display sizes. The AMOLED quality is good: vivid colours, true blacks, good contrast. At approximately £45 to £55, it's competitive with COLMI's V72 and V73 on display quality.
Xiaomi Redmi Watch 4
The Redmi Watch 4 at approximately £60 to £70 is Xiaomi's most direct smartwatch competitor to COLMI's mid-range. It features an AMOLED display and a conventional rectangular smartwatch form factor. The display quality is comparable to COLMI's AMOLED models.
COLMI AMOLED Models
COLMI's AMOLED range — V72 (£33), V73 (£35), P82 (£50), i28 Ultra (£44), M42 (£47), P86 (£45) — provides AMOLED display quality across a wider price range than Xiaomi's equivalent devices. The COLMI V72 at £33 offers AMOLED display quality that Xiaomi doesn't match at that price point with a smartwatch form factor.
Winner on display value: COLMI — AMOLED displays at lower price points than comparable Xiaomi products, and the larger physical size of smartwatch displays versus fitness bands is a meaningful advantage for many users.
Health Tracking: Feature Comparison
Both brands offer comparable core health monitoring across their mid-range products:
- 24/7 heart rate monitoring: both
- SpO2 monitoring: both
- Sleep stage tracking (light, deep, REM): both
- Stress monitoring via HRV: both
- Step counting and calorie estimation: both
- Menstrual cycle tracking: both (via app)
Where Xiaomi Has Advantages
Xiaomi's wearables benefit from more developed health algorithms behind their equivalent sensor hardware. The Mi Fitness app provides deeper insight into health data, more sophisticated sleep analysis, and better correlation between metrics than Da Fit. Xiaomi's skin temperature sensor (available on some models) enables more accurate menstrual cycle prediction than calendar-only methods. PAI (Personal Activity Intelligence) scoring — a Xiaomi feature — translates heart rate history into a weekly health score with research backing from Norwegian cardiovascular studies.
Where COLMI Has Advantages
COLMI offers the broader hardware sensor suite at lower prices. The COLMI P82's built-in GPS at £50 competes with Xiaomi Redmi watches costing £20 to £30 more for equivalent GPS capability. COLMI's 100+ sports modes is more comprehensive than Xiaomi Band's mode selection. The COLMI smart ring range (R02–R12) has no Xiaomi equivalent.
Winner on health tracking depth: Xiaomi for algorithm quality and app insight. COLMI for hardware breadth per pound spent.
GPS Comparison
Xiaomi
The Xiaomi Smart Band 9 Pro has built-in GPS — a notable achievement for a fitness band at its price point. The Redmi Watch 4 also includes built-in GPS. Xiaomi's GPS implementation is competent and produces accurate distance data for running and cycling.
COLMI
COLMI offers built-in GPS on the P82 (£50), V75 (£58), and V76 (£62). The P82's combination of GPS, 2.13-inch AMOLED, and Bluetooth calling at £50 is stronger hardware than any Xiaomi equivalent at the same price. The V76's combination of GPS and 1.43-inch AMOLED at £62 also competes strongly with Xiaomi's GPS watch range at similar price points.
Winner on GPS value: COLMI — the P82 in particular offers GPS alongside superior display size and calling features at a lower price than Xiaomi's GPS equivalents.
Smart Features Comparison
Notifications
Both brands offer notification mirroring from the phone. The advantage goes to COLMI for display size — reading notifications on a 2.13-inch display (P82) or 1.43-inch display (V76, i28 Ultra) is substantially easier than on the Xiaomi Band's narrower display.
Bluetooth Calling
The COLMI P71 (£30) and P82 (£50) support Bluetooth calling from the wrist. Xiaomi's Band series does not support Bluetooth calling. The Redmi Watch 4 may support calling depending on configuration. COLMI has a clear advantage in calling capability at the entry price point.
NFC Payments
Xiaomi Mi Pay is available on some Xiaomi wearables in China but not reliably available for UK payment systems. COLMI watches do not support NFC payments. This is a tie — neither brand offers useful NFC payment functionality in the UK market.
Smart Ring
COLMI offers a complete smart ring lineup (R02–R12). Xiaomi has no smart ring product. If a ring form factor interests you, COLMI is the only option between these two brands.
Battery Life Comparison
- Xiaomi Smart Band 9: Up to 21 days (without AOD, reduced monitoring) — impressive band battery life
- Xiaomi Smart Band 9 Pro: Up to 15 days — still very strong
- Xiaomi Redmi Watch 4: Up to 20 days — outstanding for a smartwatch
- COLMI P80/P81: Up to 12 days — very good
- COLMI V72/V73: 7 to 12 days — competitive
- COLMI P82 (with GPS): 7 to 10 days standard, 12 to 15 hours GPS — competitive
- COLMI R07 Smart Ring: Up to 30 days — extraordinary, no Xiaomi equivalent
Winner on battery life: Xiaomi for standard smartwatch/band battery performance. COLMI R07 smart ring for absolute maximum battery life with no competitor at any price.
App and Software Quality
Xiaomi Mi Fitness / Zepp Life
Xiaomi's companion app is one of the best in the budget wearable segment. It's well-designed, intuitive, provides rich health insights with plain-language explanations, and offers PAI scoring, detailed training guidance, and menstrual health features with temperature-based prediction. The app receives regular updates and has a mature, polished feel that reflects Xiaomi's significant software investment.
Da Fit (COLMI)
Da Fit is functional, clean, and easy to navigate. It presents your data clearly without interpretation depth or coaching. It's adequate for users who want to see their numbers; it doesn't tell you what your numbers mean or what to do about them. The app has improved significantly in recent firmware updates but remains less polished and insightful than Xiaomi's offering.
Winner on app quality: Xiaomi — the Mi Fitness app is genuinely better designed and more insightful than Da Fit. This is one area where Xiaomi's larger software investment translates directly to user experience.
Price Value Analysis: Key Comparisons
| Feature | Xiaomi Option | Price | COLMI Option | Price |
|---|---|---|---|---|
| Entry fitness band | Smart Band 9 | ~£35 | C8 Max | ~£34 |
| AMOLED budget watch | Redmi Watch 3 | ~£45 | V72 | ~£33 |
| GPS smartwatch | Redmi Watch 4 | ~£68 | P82 | ~£50 |
| Smart ring | Not available | — | R07 | ~£36 |
| Calling smartwatch | Not clearly available | — | P71 | ~£30 |
Who Should Choose Xiaomi?
- Users who want the best companion app experience with rich health insights and PAI scoring
- Those who value the Xiaomi brand's mainstream recognition and retail availability
- Buyers who want a slim fitness band form factor rather than a full smartwatch
- Users who prioritise battery life above most other specifications (Band 9's 21-day life is exceptional)
- Those who want skin temperature monitoring for more accurate menstrual cycle prediction
Who Should Choose COLMI?
- Buyers who want AMOLED smartwatch displays at the lowest possible price
- Those who want built-in GPS at the lowest price (P82 at £50 vs Redmi Watch 4 at £68)
- Users who want Bluetooth calling capability (P71 at £30 has no Xiaomi equivalent at that price)
- Anyone interested in the smart ring form factor (no Xiaomi ring exists)
- Buyers who want 100+ sports mode breadth in a full smartwatch form factor
- Those who want the widest range of design options including curved AMOLED (P86), horizontal screen (P85), and elegantly slim designs (M42)
Our Verdict
Both Xiaomi and COLMI are genuinely excellent brands in the budget wearable space, and choosing between them is more about matching the right product to your specific needs than declaring one objectively superior.
Xiaomi wins on software quality and battery life. If you want a better-designed app with richer health insights, or a fitness band with extraordinary battery life, Xiaomi's range is the right choice.
COLMI wins on hardware value, display options, GPS pricing, calling features, and form factor variety. If you want AMOLED smartwatch quality at the lowest price, GPS without paying a premium, Bluetooth calling under £30, or a smart ring, COLMI is the better choice.
For most UK buyers comparing these two brands, COLMI's hardware value — more features, larger displays, lower GPS prices — combined with the unique smart ring range makes it the stronger recommendation for 2026. But for buyers who will actively engage with health coaching features and want the best app experience at this price point, Xiaomi's software investment is genuinely worth the consideration.