How we score

Each model gets a score from 0 to 10. It is the average of section scores (for example display, performance, battery), and each section score is built from the specs that matter for it.

For every spec we look at where the model stands among models of the same type: being better than 90% of them gives almost the full mark for that spec, being in the middle gives about half. Weights reflect how much a spec matters for buyers. Missing data does not count against a model.

Comparisons list every spec where one model is measurably better (by more than 2%), ordered by importance and size of the difference.

Score sections

• Positioning — Satellite systems supported, Multi-band GNSS (L1 + L5/L2), Tracking channels, RTK accuracy (horizontal), RTK accuracy (vertical), Static accuracy (horizontal), Position update rate, Tilt compensation (IMU), Built-in UHF radio, L-band / PPP corrections, Dual-antenna heading, SBAS (WAAS / EGNOS), Raw data logging (RINEX)
• Display — Screen size, Pixel density, Touchscreen, Glove-friendly touchscreen, Brightness
• Maps & navigation — Preloaded maps, Turn-by-turn routing, Satellite imagery, Live traffic, Free map updates, Speed camera alerts, Driver alerts (speed limits, curves), Lane assist / junction view, Voice control, Truck / RV routing (size and weight), Preloaded golf courses, Internal storage, Memory card slot, Barometric altimeter, Electronic compass
• Connectivity & safety — Two-way satellite messaging, SOS / emergency alert, Shortest tracking interval, Wi-Fi, Bluetooth, Cellular modem (4G / LTE), ANT+, USB-C, Smartphone notifications, Hands-free calling, Camera, Built-in dash cam
• Battery — Battery life, Battery capacity, Runs on AA batteries, Hot-swappable batteries, Solar charging
• Durability — Water protection (IPx), MIL-STD-810, Drop resistance, Operating temperature (min), Operating temperature (max), Weight