Today · 7 days · 30 days
See usage by app, mobile vs Wi-Fi, download vs upload, and system or removed-app traffic separately.
Home / Data Insight
Now available on Google Play · Android · free
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. Data Insight reads the usage records Android already keeps on your phone and turns them into three answers you can act on.
Available on Google Play · Android 10+ · no account · no ads · usage analysis stays on your device
Today
What you used today, and which app used it.
One app-attributed number, split between mobile data and Wi-Fi, with the apps behind it underneath. Traffic Android cannot link to a normal installed app is shown separately as Other traffic, so the distinction stays clear. Tap any app for its own history. There is nothing to set up and no plan to enter before it works.
- A short note appears only when something is genuinely unusual, such as an app using far more than its own habit.
- Traffic your phone records without naming an app is shown as well, so the totals reconcile with Android's own data screen instead of quietly disagreeing with it.
- If you do have a monthly limit, add it and the app tells you whether it will last until renewal. That is optional and lives out of the way.
Overnight
The hours nobody watches are the hours nobody checks.
Data Insight summarizes measured overnight activity between midnight and 7 AM while the screen was off. If notifications are enabled, it can show a morning note about unusual usage; the analysis stays on the phone.
- Sent and received are shown separately, per app, because an app uploading far more than it downloads is the thing people want to see.
- No verdicts and no scare words. It reports amounts, and says plainly when the phone did not record enough to be sure.
- Every strong statement has a “Why?” behind it: the window measured, how long the screen was off, and what the app cannot see.
Save data
Apps that cost you data you never asked for.
Data Insight compares how much data an app used over thirty days with how long you actually had it open. An app you opened for three minutes that used a gigabyte is worth a look.
- Limit its background data, with the exact switch named before you go hunting for it in Android settings.
- Or uninstall it, and watch what that saved accumulate week after week.
- Apps that legitimately need to work in the background, such as photo backup or messaging, are described as such rather than accused.
Privacy
An app about data that cannot send yours anywhere.
This is not a promise in a policy document. Data Insight ships without Android's internet permission, so the phone itself blocks it from reaching any server, including ours.
No account, no ads
Nothing to sign up for. No email, no phone number, no advertising or analytics library inside the app.
Amounts, never content
It reads Android's byte counters and screen-time records. It cannot see messages, sites, files or anything you type.
Yours to delete
Usage history, the app catalog and the local database stay on the phone and are deleted when you uninstall Data Insight. Android may restore preferences or plan settings from your own device backup if backup is enabled.
Read the Data Insight privacy policy. Diagnostix360 and Data Insight are separate apps with separate policies; the Diagnostix360 policy is here.
Two apps, one question
Why a connection app also counts megabytes.
Diagnostix360
Your connection is slow, dropping or unreliable, and you want to see where the problem appears before you call the provider. Guided checks, Live Monitoring, and reports you can show somebody.
Data Insight
Your data disappears faster than it should, or your bundle runs out before the month does, and you want to know which app is responsible. Daily usage, overnight activity and data-wasting apps.
Available on Google Play.
Where they meet
An app syncing gigabytes in the background makes a connection feel slow and drains a bundle at the same time. One app helps narrow down where a connection problem appears; the other shows which apps are using your data.
Available now
See where your mobile data goes.
Data Insight is available for Android 10 and newer, in English, French, Spanish and Arabic. It works without an account, ads or trackers, and processes app-usage analysis locally on your phone.
1 · Install
Get Data Insight from Google Play.
2 · Allow Usage Access
Android asks you to grant Usage Access so Data Insight can read the usage records already stored on your phone.
3 · Use your phone normally
Today, Overnight and Save data become more useful as Android records real usage over time.
Android 10 and newer · free · no ads · no account. Feedback is available from inside the app and through support@diagnostix360.com.
Available now on Google Play
More ways to take control of your data.
Data Insight uses Android's own records to help you see the amount and timing of app traffic. It does not inspect the content of your messages or browsing.
Data Guardian alerts
Choose an optional mobile-data plan and usage alerts, with a forecast based on observed consumption.
Overnight & background
Spot apps that use data while your screen is off, and review rarely opened apps consuming unexpected amounts.
Weekly reports
Review weekly usage summaries and export a report when you want to share it.
Clearer plan decisions
Estimate a suitable mobile plan size from your history rather than guessing.
Private by design
No account needed. App usage analysis remains on the phone rather than being uploaded to Diagnostix360 servers.
Inside the app
All eight screens
The same screens as on Google Play, with example numbers. App names are generic examples.
Questions people ask first.
Why does it need Usage Access?
That single Android setting is what lets an app read the phone's own per-app network and screen-time records. Without it there is nothing to show. You switch it on once, in Android settings, and you can switch it off whenever you like.
Why are its numbers different from my phone's data usage screen?
Android files some traffic under anonymous buckets: the system itself, hotspot use, and apps that have been uninstalled. Data Insight keeps those out of the per-app totals so the app ranking stays honest, and shows the amount separately as other traffic, with a breakdown of what is in it.
Does it slow the phone or drain the battery?
It reads records Android has already written rather than continuously monitoring network traffic. A lightweight background refresh is scheduled about once an hour, with timing controlled by Android. It is designed for very low battery impact.
An app I deleted last week does not appear. Why?
Android deletes an app's name and icon when it is uninstalled and keeps only the bytes, so nothing can name it afterwards. Data Insight can only name apps it saw while they were still installed; from the day you install it, every app you remove keeps its name and its saving.
Will it work on my phone?
Android 10 and newer. Manufacturers record different levels of detail, and where a figure cannot be measured on your phone the app says so instead of estimating it.
What will it cost?
Data Insight is currently free. If optional paid features are introduced in a future version, they will be clearly disclosed before purchase.