Five checks run in order, about thirty seconds in all. The speed test is last
because it saturates the connection and would corrupt the figures before it.
The checks
Check
What it does
Wi-Fi status
Reads signal, noise, channel, band, standard and security, then scans the neighbours and names the clearest channel in the band
LAN gateway
Eight echoes to your router — latency, loss and jitter of the Wi-Fi link itself
ISP gateway
Finds the first public router past yours and measures it with six echoes
DNS lookup
Resolves a name through your network's resolver and times it
Speed test
Download then upload, eight seconds each over parallel streams, measured after a warm-up
A run in progress — each check reports as it finishes
Verdicts
PASS
Measured, and inside every target
WARN
Measured, and outside at least one — the recommendation says which
FAIL
Nothing answered, the name did not resolve, or no data moved
SKIP
Not measured, and not a fault — the network's policy prevented it
Thresholds
Check
WARN when
FAIL when
Wi-Fi
Signal below −67 dBm · signal-to-noise below 25 dB · another network on your channel · three overlapping · radar-shared channel · open or outdated security
Not connected
LAN gateway
Loss 1% or more · average over 100 ms · jitter over 60 ms, or larger than the link's own average
No reply
ISP gateway
Loss 1% or more · average over 150 ms · jitter over 60 ms
—
DNS
Slower than 300 ms
Did not resolve
Speed
Download below 5 Mbps · upload below 1 Mbps
A direction moved nothing
A silent ISP gateway is reported as SKIP, not FAIL: those routers ignore probes as
routine policy. A direction that moves nothing is reported as a failure with its
reason, never as 0.00 Mbps.
Permission
Android requires a location permission before an app may read the connected Wi-Fi
network's name or scan for neighbours. NHCheck Lite asks for it for that alone and
never reads your position. Decline it and every check still runs — you lose the
network name and the channel advice. See the privacy policy.
Requirements
Platform
Android phone or tablet
Price
Free — no subscription, no advertising
Languages
English and العربية
Account
None
The speed test moves real data — on a 100 Mbps connection, roughly 100 MB each way.
Be deliberate about running it on a metered plan.
