Where do I see data usage on my iPhone?

In Settings > Cellular, under “Cellular Data” — but the “Current Period” only resets when you reset it manually, so it rarely reflects your actual billing month.

Does the iPhone show how much data I have left?

Not natively. iOS shows what you've used since the last manual reset, not what remains of your plan. Apps like Databit calculate your remaining GB in real time.

How to check data usage on iPhone

Updated July 2026 · 4 min read · By the Databit team

To check data usage on iPhone, go to Settings > Cellular and look at the “Current Period” total. The catch: that counter never resets on its own, so it almost never matches your billing cycle. To see your real monthly usage — and how much you have left — use a meter like Databit, which resets automatically on your billing day.

Checking data usage with iOS settings

Open Settings and tap Cellular (or “Mobile Data” in some regions).
Scroll to Cellular Data: you'll see the total used in the “Current Period”.
Below that, usage is broken down per app, largest first.

The steps are identical on iPhone 11 through iPhone 16 Pro — the path hasn't changed in years.

The problem: “Current Period” isn't your billing cycle

The iOS counter counts from the last time someone tapped “Reset Statistics” — which may have been eight months ago, or never. That's why the number rarely matches what your carrier is billing you this month. And iOS tells you what you've spent, never how many GB you have left, how many days remain in your cycle, or when you're about to hit your cap.

Seeing your real usage with Databit

Automatic reset: set your billing day once; the counter resets itself every cycle.
Data remaining, not just used: the circular meter shows your GB left and percentage remaining, measured byte by byte across LTE, 4G, 3G and EDGE.
No app-opening required: two home-screen widgets show used, remaining and days left.

Databit on iPhone showing the circular data meter: 7.06 GB remaining, 70.6% of the plan — Databit's meter: your remaining data at a glance

Setup takes two minutes: download Databit, enter your plan's GB and your billing day, and you're done.

What about per-app usage?

Apple doesn't let third-party apps read the per-app breakdown; that detail lives only in Settings > Cellular. The winning combo: Databit for the real-time total, cycle tracking and alerts — plus the Settings list when you need to identify which specific app is eating your plan.

Track your data usage in real time

Databit shows how many GB you have left, alerts you at 20% and 10%, and resets automatically on your billing day. One-time purchase, no subscription.

Get Databit — 4.6★ on the App Store