Wearable Device Comparison Calculator

Score and compare wearable devices using personalized feature importance weights. Calculate cost-per-point, monthly cost, and value metrics.

Inputs

Device price ($)

Expected lifespan (years)

Battery life score (0-10)

Health sensors score (0-10)

GPS score (0-10)

Display score (0-10)

App ecosystem score (0-10)

Water resistance score (0-10)

Durability score (0-10)

Battery importance (1-10)

Health sensors importance (1-10)

GPS importance (1-10)

Display importance (1-10)

App ecosystem importance (1-10)

Water resistance importance (1-10)

Durability importance (1-10)

Tab to move between fields

Results

Weighted feature score (0-10)

7.1

Unweighted average (0-10)7

Cost per score point ($)$49.33

Cost per month ($)$9.73

Cost per year ($)$116.67

Value score2.03

Biggest weakness (feature index)6

How to Use This Calculator

Enter the device price ($) and your expected ownership lifespan (years).
Score each feature (battery, health sensors, GPS, display, apps, water resistance, durability) from 0–10.
Set importance weights (1–10) for each feature to reflect your priorities.
Review the weighted feature score, cost per score point, and monthly/annual cost of ownership.
Compare multiple devices by running the calculator for each and comparing their value scores.

How the result changes with Health sensors score (0-10)

Health sensors score (0-10)	Weighted feature score (0-10)
1	5.6
3.5	6.13
6.5	6.77
9	7.31

What each input means

Device price ($): Purchase price of the wearable device.
Expected lifespan (years): How many years you expect to use this device.
Battery life score (0-10): Select the battery life score (0-10)
Health sensors score (0-10): Rate health sensor suite (HR, SpO2, ECG, temp, etc.).
GPS score (0-10): Rate GPS accuracy and acquisition speed.
Display score (0-10): Rate display brightness, resolution, and readability.
App ecosystem score (0-10): Rate app store, third-party integrations, and companion app quality.
Water resistance score (0-10): Select the water resistance score (0-10)
Durability score (0-10): Rate build quality, scratch resistance, and ruggedness.
Battery importance (1-10): How important is battery life to you?
Health sensors importance (1-10): How important are health tracking sensors to you?
GPS importance (1-10): How important is GPS accuracy to you?
Display importance (1-10): How important is display quality to you?
App ecosystem importance (1-10): How important is the app ecosystem to you?
Water resistance importance (1-10): How important is water resistance to you?
Durability importance (1-10): How important is build quality and durability to you?

What each result means

Weighted feature score (0-10): Overall device score weighted by your personal feature priorities.
Unweighted average (0-10): Simple average of all feature scores without weighting.
Cost per score point ($): Price divided by weighted score. Lower = better value.
Cost per month ($): Monthly cost spread over expected lifespan.
Cost per year ($): Annual cost spread over expected lifespan.
Value score: Feature points per $100 spent. Higher = better value.
Biggest weakness (feature index): Index of the feature with the largest gap: 0=Battery, 1=Health, 2=GPS, 3=Display, 4=Apps, 5=Water, 6=Durability.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Device price ($) = 350, Expected lifespan (years) = 3, Battery life score (0-10) = 7, Health sensors score (0-10) = 8 = 16 input(s) provided
Calculate Weighted feature score
Weighted feature score = (batteryScore * wBattery +
7.1 = 7.1
Calculate Unweighted average
Unweighted average = (batteryScore + healthSensorScore + gpsScore + displayScore + appEcoScore + w...
7 = 7
Calculate Cost per score point
49.33 = $49.33

Engine last updated July 28, 2026. Checked against 2 independently-derived tests — how we verify calculators.

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