Our Testing Methodology
Every score on this site comes from the same three-tier test protocol. Total test time: minimum 90 days per tracker. This is why our reviews take longer to produce than most review sites — the data doesn't come fast. This page documents the full protocol, including the failure modes we don't put in the public reviews.
If You Read Only One Sentence
Every tracker we've ever reviewed was installed in a real vehicle and tested for at least 90 days across city, highway, and rural conditions — and the single most predictive failure point is antenna quality in rural areas, not brand, not price, and not the spec sheet.
The Three-Tier Test Protocol
Installation in a single vehicle. Five scripted routes: suburban loop (12 mi), highway (45 mi), urban dense (6 mi), rural cross-county (28 mi), and night route (18 mi). GPS-reported position tracked against a separate reference device at 30-second intervals. Pass criteria: 95th-percentile position error < 30m on suburban/highway, < 60m urban, < 100m rural.
Continuous operation for 45 days. We log battery voltage (hardwired) or battery percentage (battery-powered), update consistency, and "silent failure" events — moments when the tracker stopped reporting for >10 minutes without notifying the user. Median silent-failure events per unit (2025 dataset): 1.8 per 45 days.
Selected units continue for 30+ more days under stress conditions: temperature cycling (32°F overnight / 95°F midday), rain exposure, and 3–4 hard-vibration events per week. We measure survival rate and post-test signal accuracy. 90-day survival rate, all tested trackers (2024–2025): 71%.
What We Don't Publish in Reviews
Three categories of data stay on the L3 archive page and don't go into the public reviews:
1. Failure logs by brand. When a specific model fails in a specific way (e.g., an antenna that desolders after 45 days of vibration), we don't name the brand publicly unless the failure is widespread.
2. Negative signal-strength outliers. Some units produce rural signal strength so poor that we exclude them from comparisons.
3. The full battery-decay curves. Our reviews summarize battery performance in a single number. The raw curves — including the knee point — are on the L3 page.
Related Pages
All Methodology Articles
Articles loading. Run publish.php to populate this list.
Frequently Asked Questions
Minimum 90 days per tracker. Tier 1 (baseline) is 14 days, Tier 2 (endurance) is 45 days, Tier 3 (long-term stress) is 30+ more days. This is why we can't review new products quickly.
Yes — same five scripted routes, same reference device, same temperature cycling, same vibration events. This is why our scores are comparable across brands.
You can replicate the most important test — rural signal strength — in an afternoon. Just install one tracker in your most representative vehicle and compare its location to your phone's map on a rural route. If it fails, return it.
It varies. Well-known trackers: 5–10 units. Niche brands: 1–2 units. We publish the sample size on every review so you know how much confidence to place in the score.
Primary test region is the Front Range of Colorado — a mix of urban, suburban, and rural. Trackers that pass here may not perform the same in very different geographies. We try to run at least one cross-region test for any tracker we rate highly.