A wider scale for reading differences, with original ratings always available.
Understanding the 100-point index
The index converts the published five-point rating using a fixed scale. It preserves order and ties; it is neither a new performance measurement nor a quality percentage.
85β100Excellent
70β84Very strong
55β69Good
40β54Notable trade-offs
0β39Limited
For example: 3.0/5 β 36; 4.0/5 β 64; 4.5/5 β 81; 5.0/5 β 100.
Index = 100 Γ (rating out of 5 Γ· 5)Β², rounded to the nearest integer.
Equal original ratings keep an equal index. Adding models does not change the scale.
Comparison guidelines
0 points: equal index. 1β7: small gap. 8β14: visible advantage. 15 or more: large gap. These are editorial guidelines, not statistical significance thresholds.
Indices derived from external reviews retain their original rating and source. Methods and dates may differ, so these comparisons do not declare an automatic winner.
01Health & sport
Sensors, insights, safety features and usefulness of the health experience. Training depth, positioning accuracy, coaching and recovery tools.
02Battery
Real-world endurance, charging convenience and always-on trade-offs.
03Display
Readability, resolution, brightness and always-on display.
04Ecosystem
Notifications, apps, payments, calls and ecosystem integration.
05Design & comfort
Wearability, controls, display legibility and build quality.
06Value
Capability and durability relative to the current market price.