Step 1
Start with one tap
Run the full check from the app or the home-screen widget. If something specific is wrong, pick it while the measurement continues.
Find where your internet problem starts.
Slow internet? Wi-Fi dropping? Calls freezing? Diagnostix360 checks every step from your phone to the internet — your Wi-Fi, router, provider and DNS — in about a minute, then tells you what to try first.
- Free, no account
- No ads
- About 2 MB to download
- English, Français, Español, العربية
Not sure where to start?
What’s going wrong?
Pick what you notice. You’ll see the usual causes, one thing to try right now, and what the app measures to confirm it.
Everything is slow
Usual causes
- Weak Wi-Fi in the room you are in
- The router is overloaded or needs a restart
- Your provider’s line is busy at that hour
Try this first
Test once right next to the router, then again in the slow room. If it is much better near the router, Wi-Fi coverage is probably part of the problem — check again to confirm the pattern.
What Diagnostix360 checks
Wi-Fi signal, phone → router delay, router → internet, DNS, and speed if you choose it.
Videos keep buffering
Usual causes
- Speed drops at busy times of day
- Too many Wi-Fi networks on the same channel
- Another device is downloading or uploading
Try this first
Pause big downloads and use the 5 GHz Wi-Fi if your router has it. Then test at the time the buffering happens.
What Diagnostix360 checks
Download and upload speed, delay under load, and how crowded your Wi-Fi channel is.
Calls freeze or drop
Usual causes
- Packet loss or jitter — speed is often fine
- Delay jumps when someone else uses the line
- The phone switching between Wi-Fi and mobile data
Try this first
Stay close to the router during the call and stop uploads (backups, photo sync). If it keeps happening, run Live Monitoring during your next call — it measures the network, never the call itself.
What Diagnostix360 checks
Jitter, packet loss and delay under load. Live Monitoring records up to 90 minutes, with the time of every drop.
Games lag
Usual causes
- High or spiky ping
- Delay rising while the line is busy
- A long route to the game server
Try this first
Play near the router on 5 GHz and pause downloads on other devices.
What Diagnostix360 checks
Server ping, jitter, delay under load and international routes.
Can’t get online
Usual causes
- The router or the provider line is down
- Websites can’t be found (DNS)
- You are at the edge of Wi-Fi coverage
Try this first
Check if other devices are online. If mobile data works and Wi-Fi doesn’t, the cause is most likely at home: restart the router once, then check again.
What Diagnostix360 checks
Each step on its own — phone, router, internet, DNS — so you can see where it stops.
Slow only at certain times
Usual causes
- Your provider is congested at peak hours
- Neighbours’ Wi-Fi is busiest in the evening
- Heavy use at home at the same time
Try this first
Run one check at a good time and one at a bad time, and compare the two reports.
What Diagnostix360 checks
Saved reports to compare, and Live Monitoring that timestamps every slowdown.
Find the problem
From “it’s just slow” to knowing what to fix.
Tap once, describe the problem if you like while it measures, then follow the suggested next step. The speed test is optional.
Step 2
Watch each step get checked
Phone, router, provider, DNS and common online services are tested in turn. A speed measurement can run alongside if you choose it.
Step 3
Fix it, or document it
Try the suggested step and re-check. Ask for a reminder to test again later, or send a one-page report if you still need help.
See it on a real phone.
Real screens from the app. Network names and addresses removed.
Catch problems that come and go
For the fault that never happens while you watch.
A quick check catches what is happening now. Live Monitoring keeps measuring for up to 90 minutes, keeps going when you switch between Wi-Fi and mobile data, and records every drop with its time — so the problem that disappears when the technician arrives finally has evidence.
Share the evidence
Give your provider evidence, not just a feeling.
Three report types, each in English, French, Spanish or Arabic. The English samples use fictional values. The French and Arabic ones are real reports from a test on our own network, with network names, IP addresses, provider and location removed.
Customer report
A clear verdict, speed where measured, the connection path and simple next steps.
Technical report
The one to send your provider: scoring evidence, Wi-Fi and path measurements, confidence and the limits of the test.
Live Monitoring report
Session length, availability, jitter, packet loss and a minute-by-minute quality timeline.
What people say on Google Play
Rated 4.8 out of 5 on Google Play, October 2026.
“Nice application. Professional report. My internet score is 95/100 !!”
Google Play review · August 2026“Very useful data”
Google Play review · October 2026“Good app”
Google Play review · September 2026
Real results
What 958 real checks found.
Anonymous results from Diagnostix360 users who turned on diagnostic data sharing, 5 September to 26 October 2026.
42%of checks found something worth fixing
41%even when people were “just checking”
1 in 8checks: slow or failing DNS
65%of speed tests: delay jumped by more than 100 ms when the line was busy
Most common findings: the provider’s path (14%), DNS (12%), Wi-Fi (7%), mobile signal (5%), router (4%). Speed figures: 472 tests from 16 October. Groups of fewer than 20 installations are never published.
Internet help
Practical guides for the most common problems.
Speed test · 5 minHow to test your internet speed — and what the result actually meansWhere to test, what to pause, and a free tool that reads your result for you.Can’t get online · 4 minWi-Fi connected but no internet: where to look firstTwo quick questions point you to the phone, the router or the line.Phone & mobile data · 5 minWhy is my internet so slow on my phone all of a sudden?Wi-Fi, mobile signal, a setting or the network: two comparisons narrow it down.Router & Wi-Fi · 4 minHow to change your Wi-Fi passwordFind the router address, sign in, and pick a strong password with a free generator.
Questions
Good to know.
Is Diagnostix360 free?
Yes. It is free, with no account and no ads.
Which phones does it work on?
Android 8.0 or newer. An iPhone version is not available yet.
Does it use a lot of mobile data?
The speed test is optional, and it is what uses data: up to 170 MiB for the full test (about 25 seconds) and up to 55 MiB for the quick test (about 12 seconds). Before a test on mobile data, the app shows this budget so you can choose.
Why does it ask for location permission?
Android only lets apps read Wi-Fi details such as the network name and signal when they have location permission. Depending on your privacy settings, a technical report can include a city-level location; a report only leaves your phone if you share it.
Can it prove the problem is my provider?
It shows where along the path the problem appears — Wi-Fi, router, provider or DNS — during the time it measured. It is a diagnostic aid, not a certified measurement, but it gives your provider facts instead of a feeling.
What is Live Monitoring?
A longer test for problems that come and go. It keeps measuring for up to 90 minutes, carries on when you move between Wi-Fi and mobile data, and records each drop with its time.
Which languages?
The app and its reports are in English, French, Spanish and Arabic.
Our second app
Where is all your mobile data going?
Find out which apps are using your data — even overnight, with the screen off — before your bundle runs out.
- Free
- No account, no ads
- Works without internet access
- Android 10+
Private by design.
No account and no ads. Checks run on your phone and work without any optional sharing. Diagnostic sharing and usage analytics are separate choices you can change at any time, and you decide whether a report leaves your phone. A speed test connects to the test server you start it with.
For ISPs & support teams
Diagnostix360 for ISPsCustomers who call with the check already done.
Try Diagnostix360 on real support tickets with a free 30-day pilot, and see the reports your agents would receive.
Know what’s wrong before you call anyone.
Test in the room where it goes wrong, try the first suggestion, and keep the report in case you still need help.
Using an iPhone? Diagnostix360 is on Android for now. Get notified when iOS is available.