COLMI P82 vs Garmin Forerunner 55: Can a £50 Watch Compete With a £180 Running Watch?

The Garmin Forerunner 55 is widely regarded as the best entry-level GPS running watch available, retailing at approximately £160 to £180 in the UK. It has a track record of GPS accuracy, a mature running-focused software ecosystem, and the Garmin brand's decades of trust in the sports watch market. The COLMI P82 costs approximately £50 and offers built-in GPS, a 2.13-inch AMOLED display, Bluetooth calling, and comprehensive health monitoring. The price difference is approximately 3.5x. Can the COLMI genuinely compete?

This is the most honest, detailed comparison of these two watches available — covering GPS accuracy, running metrics, heart rate monitoring, software, battery life, daily wearability, and value to give you a clear picture of which watch is right for which runner.

The Case For Each Watch

Why the Garmin Forerunner 55 Has Been the Default Recommendation

The Forerunner 55's reputation is built on several genuine strengths:

• Garmin Connect ecosystem: One of the most mature fitness tracking ecosystems available, with detailed training analytics, coaching plans, Strava integration, and years of algorithm development
• Running-specific metrics: Cadence, vertical oscillation, ground contact time (with compatible accessories), training load, race predictor, and recovery time guidance
• GPS accuracy track record: Consistent, well-validated GPS performance across thousands of user tests and independent reviews
• Safety features: LiveTrack for sharing location with family members during runs, Incident Detection that alerts emergency contacts if the watch detects a sudden impact or stop
• Structured workout support: Built-in training plans and interval workout programming accessible directly from the watch
• Community and ecosystem: Garmin's large user base means extensive community content, third-party app support via Connect IQ, and a wealth of support resources

Why the COLMI P82 Is Worth Taking Seriously

The P82 makes a compelling counter-argument to the Forerunner 55's premium:

• Built-in GPS at £50: The same fundamental capability as a £180 Garmin — standalone route tracking without a phone — at less than a third of the price
• 2.13-inch AMOLED display: The largest and most vivid display of any GPS watch in this price comparison, dramatically more readable than the Forerunner 55's 1.04-inch MIP display
• Comprehensive health monitoring: Heart rate, SpO2, sleep stages, HRV stress monitoring, and 100+ sports modes round out a feature set that significantly exceeds the Forerunner 55's health tracking breadth
• Bluetooth calling: A feature the Garmin doesn't offer at any price in the Forerunner 55 tier
• Smartwatch daily usability: The P82 is a full-featured smartwatch with notification mirroring, weather, music control, and other smart features. The Forerunner 55 is a running watch with limited smartwatch functionality.
• Price saving: The £120 to £130 saved over the Garmin could fund a gym membership, running shoes, or a smart ring for overnight health monitoring

GPS Performance: The Most Critical Comparison

Garmin Forerunner 55

The Forerunner 55 uses a well-validated single-frequency GPS receiver with multi-satellite system support (GPS, GLONASS, Galileo). In independent testing across multiple reviewers and comparison studies, the Forerunner 55 consistently achieves GPS distance accuracy within 0.5 to 1.5% of actual measured distances in open terrain, and 1 to 3% in more challenging environments (urban canyons, dense tree cover). GPS acquisition typically takes 10 to 30 seconds with a recent satellite ephemeris downloaded.

For competitive runners where GPS pacing accuracy within 10 to 15 seconds per km matters for race performance, the Forerunner 55's GPS consistency is its most valued attribute. It's dependable, well-tested, and trusted by runners who have used it across hundreds of training sessions.

COLMI P82

The P82's built-in GPS delivers distance accuracy typically within 2 to 4% of actual distance in open terrain conditions. In urban environments with tall buildings and in areas with tree cover, accuracy can vary to 3 to 6%. GPS acquisition takes 20 to 45 seconds in open conditions. Route tracking in open countryside and parks produces recognisable and usable route maps; in dense urban environments, some track smoothing and deviation is visible.

For most recreational runners, 2 to 4% GPS error is entirely adequate. Over a 10km run, this represents a potential distance error of 200 to 400 metres — your watch might display 9.8km or 10.4km for an actual 10km run. For training volume tracking and general pacing awareness, this accuracy is perfectly useful. For competitive runners targeting specific finishing times where every second per km matters, the P82's GPS variance can be a meaningful limitation.

GPS winner: Garmin Forerunner 55 — more consistent accuracy, particularly in challenging GPS environments. COLMI P82's GPS is adequate for recreational use but less precise for competitive athletes who rely on GPS pacing accuracy.

Running-Specific Metrics

Garmin Forerunner 55

The Forerunner 55 is purpose-built for running and provides metrics that go beyond basic GPS distance and pace:

• Running cadence: Steps per minute, with coaching guidance toward the optimal 170 to 180 spm range
• Training status: Garmin's algorithm assesses your recent training load and fitness trajectory, telling you whether you're "Productive," "Maintaining," "Overreaching," or in need of recovery
• Race predictor: Estimates your finish time for 5K, 10K, half marathon, and marathon based on recent training data and VO2 max estimates
• Recovery time: Recommended rest hours after each workout before your next hard session
• Garmin Coach: Free adaptive training plans that adjust based on your fitness data and progress
• Interval workout support: Build and run structured interval sessions directly from the watch (e.g., "6 x 800m with 90-second recovery")
• Strava integration: Activities sync automatically to Strava with full GPS data

COLMI P82

The P82 provides the fundamental running metrics:

• GPS distance and pace (current and average)
• Real-time heart rate and zone monitoring
• Elapsed time and lap time
• Calorie burn estimation
• Route map (viewable in Da Fit post-run)
• Heart rate chart across the run (viewable post-run)

The P82 does not provide cadence, training load analysis, race predictions, structured interval programming, or the coaching ecosystem that distinguishes Garmin's running software. Post-run analysis in Da Fit is meaningful but less sophisticated than Garmin Connect.

Running metrics winner: Garmin Forerunner 55 — significantly more sophisticated running-specific analytics and coaching. The difference is most pronounced for runners who want structured training guidance and detailed performance analysis.

Heart Rate Monitoring

Accuracy Comparison

Both watches use optical wrist-based heart rate sensors, and both perform similarly for steady-state running at moderate intensities — typically within 3 to 7 bpm of chest strap references. The Garmin has a longer history of optical HR calibration and may edge ahead slightly for high-intensity interval accuracy in some studies, but for Zone 2 running and general cardiovascular training, the difference is not practically significant for most runners.

Health Monitoring Breadth

This is an area where the COLMI P82 has a clear advantage. Beyond running heart rate:

• The P82 includes SpO2 monitoring, HRV stress scores, sleep stage tracking, and menstrual cycle support
• The Forerunner 55 monitors heart rate and provides basic sleep tracking and stress (via Garmin Body Battery), but the health monitoring breadth is narrower than the COLMI's comprehensive suite

Heart rate accuracy winner: Tie for recreational use. Health monitoring breadth winner: COLMI P82.

Display: A Major Advantage for COLMI

This is one of the most immediately apparent differences between the two watches and consistently surprises people who haven't seen the P82 in person.

The Garmin Forerunner 55 uses a 1.04-inch MIP (Memory-in-Pixel) display. MIP displays have excellent battery life and good outdoor visibility due to their transflective technology (they reflect ambient light), but they produce a low-resolution, limited-colour visual that looks noticeably dated compared to modern smartphone screens or AMOLED watches. The display is functional for running data but not impressive as a daily watch face.

The COLMI P82 has a 2.13-inch AMOLED display — more than four times the display area, full colour, vivid, and sharp. For daily smartwatch use, reading notifications, and checking health data, the P82's display is dramatically better. Even for running use, the larger AMOLED display shows pace and heart rate in larger, more immediately readable numbers.

The Garmin's MIP display does have one advantage: outdoor visibility in very bright direct sunlight is slightly better due to the reflective technology, whereas AMOLED readability decreases somewhat in extreme direct sunlight. But for the vast majority of outdoor running conditions, the P82's AMOLED is very readable.

Display winner: COLMI P82 — significantly larger, more vivid, and better for everyday smartwatch use.

Daily Smartwatch Features

The Forerunner 55 is primarily a running watch with some smartwatch features. The P82 is a full smartwatch with built-in GPS. This philosophical difference shows clearly in daily usability:

• Notifications: Both display notification previews. The P82's larger display and touch navigation make interacting with notifications more natural.
• Calling: The P82 supports Bluetooth calling from the wrist. The Forerunner 55 does not.
• Music: Both support music control from the wrist. Neither stores music locally.
• Watch face variety: The P82 has extensive downloadable watch faces via Da Fit. The Forerunner 55 has a limited selection of functional running-focused faces.
• App ecosystem: The Garmin Connect IQ store offers third-party apps and watch faces. Da Fit has watch faces but no third-party app installation.

Daily smartwatch winner: COLMI P82 — significantly better as an everyday smartwatch. Better display, calling capability, more watch face options.

Battery Life

• Garmin Forerunner 55: 14 days standard mode; approximately 20 hours continuous GPS
• COLMI P82: 7 to 10 days standard mode; approximately 12 to 15 hours continuous GPS

The Garmin has longer battery life in both standard and GPS modes, which matters for runners doing very long training sessions or races. For standard recreational running (sessions under 3 hours), the P82's GPS battery is entirely adequate. For ultra-marathon or multi-day endurance events, the Garmin's longer GPS life is a practical advantage.

Battery winner: Garmin Forerunner 55 — longer in both modes.

Build Quality and Durability

The Forerunner 55 has a proven track record of durability through thousands of user miles. The P82 is a newer device with a shorter track record, though COLMI's IP68 rating and solid build construction suggest comparable everyday durability. The Forerunner 55 has a specific advantage for runners who train in very challenging conditions — technical trail running, extreme weather, multi-day events — where a proven track record provides confidence that a newer device's claims of durability cannot yet match.

Durability winner: Garmin Forerunner 55 (proven track record). COLMI P82 (equal on paper but unproven long-term).

The Definitive Verdict: Who Should Buy Each Watch?

Buy the COLMI P82 if:

• You're a recreational runner who wants GPS distance and pace tracking for training awareness
• Display size and visual quality matter to you — the AMOLED is dramatically better for everyday use
• You want a watch that's equally useful as a daily smartwatch and a running watch
• Bluetooth calling is a feature you'd use
• The £120 to £130 price saving is meaningful and you want GPS running capability without the premium
• SpO2, sleep tracking, and comprehensive health monitoring alongside running metrics are priorities
• You run less than 3 hours at a time and standard recreational distances (5K to half marathon)

Buy the Garmin Forerunner 55 if:

• You're training seriously for races and need accurate GPS pacing to within 15 seconds per km
• Structured training plans, interval programming, and Garmin Coach are features you'll actively use
• You want Strava integration and running cadence monitoring
• Training load analysis and race prediction metrics matter to your training approach
• You run very long distances (marathon training, ultra preparation) where GPS battery life matters
• The Garmin ecosystem (Connect app, third-party apps, community) is something you value
• Budget is not a primary constraint and the £180 price is acceptable for what you're getting

The Honest Summary

The Garmin Forerunner 55 is a better running watch than the COLMI P82. Its GPS is more precise, its running analytics are more sophisticated, its training ecosystem is more mature, and its battery life is longer. These differences matter significantly for competitive and performance-focused runners.

The COLMI P82 is a better everyday smartwatch that also tracks runs. Its display is dramatically better, its daily features are more comprehensive, it adds Bluetooth calling and health tracking the Garmin lacks, and it does all of this for £130 less. For recreational runners whose primary goal is tracking their runs and improving their fitness — rather than optimising race performance with sophisticated analytics — the P82 provides genuinely adequate GPS running capability at a fraction of the cost.

The right choice depends entirely on which type of runner you are. Both watches are excellent at what they're designed for. Know which matters more to you.