Aquila – Speed & Latency Test

Codex Consulting GmbH

About this app

Aquila measures what your line actually delivers: download, upload, latency –
and the bufferbloat that explains why everything stalls the moment an upload
is running.

A run takes about 25 seconds. One dial, two numbers, one line of latency.

WHAT IS MEASURED
• Download and upload in megabits per second
• Latency of the idle line – median of seven probes
• Latency under load: the same measurement while download and upload run
• Bufferbloat: the difference between the two. If your latency rises from
20 to 300 milliseconds under load, that is why video calls stutter –
and it is not a question of bandwidth

MEASURED HONESTLY
• Six streams down, four up – a single connection is limited by its window,
not by your line
• A separate connection per stream, otherwise you measure HTTP/2 multiplexing
• The first two seconds do not count: they show the ramp-up
• Random data on upload – zeros would give dream results on compressing links
• Latency probes on their own connection, otherwise you measure your own
queue instead of the line's bufferbloat
• Median instead of mean: one outlier must not shift the verdict

HISTORY
• Every measurement is kept with date, place and network – Wi-Fi name,
mobile carrier or LAN
• So you can tell whether it is the line or the location
• The history stays on your device

MADE TO LOOK AT
• Eggshell paper, a black engraved instrument, one coloured glow – no neon,
no data sheet
• Freely chosen colour across the full wheel, from red through yellow and
green to violet
• Black-and-white mode and an inverted night version
• 34 languages

PRIVATE
• No account, no ads, no analytics or tracking
• The measurement history never leaves your device
• Location is used only to name the place in your history – it is never
transmitted. Without permission Aquila measures just fine

Measurements run against Cloudflare's public measurement endpoint.

What’s new

Initial release of Aquila with speed, latency and bufferbloat measurement, local history and multilingual interface.