Parameters used by unReachable

Latency

The time it takes for data to travel from your device to a destination and back. Lower latency means faster response times.

Jitter

The variation in latency over time. High jitter can cause unstable connections, delays, or choppy audio/video.

Packet loss

The percentage of data packets that never reach their destination. Packet loss can result in lag, missing information, or interrupted communication.

External endpoint for measuring Network Latency

20 May of 2026: unReachable in its initial version: 2.1 uses Cloudflare as the default external endpoint to test connectivity and measure latency, jitter and packet loss.

This is something that might change in future app updates !

There are several reasons behind this is:

1. Global Presence / Nearby Servers
Cloudflare operates one of the world's largest edge networks with data centers in hundreds of cities worldwide. Your latency test will usually hit a geographically close server, reducing bias from long-distance routing.

2. High Availability & Stability
Cloudflare infrastructure is highly reliable and rarely offline or overloaded. That makes measurements more consistent and reduces false spikes caused by a weak test server.

3. Low Server-Side Processing Delay
Cloudflare's edge systems are optimized for extremely fast response times. The measured delay mainly reflects your PC + local network + ISP path, not slow application processing on the remote side.

4. Representative Internet Path
Testing against Cloudflare measures latency to a major internet backbone destination rather than just your local router. This gives a realistic indication of real-world internet responsiveness.

5. Excellent ISP Peering
Most ISPs maintain direct or optimized peering with Cloudflare. Fewer routing detours generally mean cleaner, more reproducible latency results.

6. Widely Reachable & Firewall-Friendly
Cloudflare endpoints (e.g. 1.1.1.1) are broadly accessible worldwide and usually not blocked, making them suitable for consumer applications.

7. Consistent Benchmark Across Users
If many users measure against the same provider, results become more comparable between different PCs, ISPs, and locations.

Examples:

• Router ping → measures local network latency.
• Cloudflare (1.1.1.1) ping → measures end-to-end internet latency, including ISP performance.

This provides a more complete picture of overall network quality.

Quality Score System

The final Quality Score is a weighted composite of three sub-scores calculated using linear interpolation between thresholds to ensure smooth transitions without hard steps.

The three sub-scores comes from the latest values of Latency, Jitter and Packet-Loss statistics.

1. Component Weights & Logic

Component	Weight	Logic / Thresholds
Latency	45%	≤10ms = 100 → ≥350ms = 0 (Smooth interpolation)
Jitter	30%	<2ms = 100 → ≥40ms = 0
Packet Loss	25%	0% = 100 → ≥5% = 0

2. Grading Scale

Score	Grade	Label	Visual Color
90–100	S	Perfect	Green
75–89	A	Excellent	Sky Blue
60–74	B	Good	Blue
45–59	C	Fair	Amber
25–44	D	Poor	Orange
0–24	F	Critical	Red

3. the UI Elements

In all UI's (Desktop, Taskbar or Widget) we have embed most of the ui color-schemes that are described below according to the available space for each:

Large numeric score with a /100 suffix, dynamically colored to match the grade.
Letter grade badge (S/A/B/C/D/F) featuring a tinted background.
Full-width gradient progress bar moving from red → amber → green.
Three dot-bars (●●●●●) representing individual per-component sub-scores.
A bottom status bar that dynamically updates to display the grade name while monitoring.

How unReachable calculates your Network Quality Score ?

Desktop Widget

Taskbar Widget

Windows Widget