DataTally

Take control of your Mac's data usage.

See which apps are using data, in real time. Distinguish between Wi-Fi and Mobile Hotspot data usage. Block any app from the network.

Download for macOS Free for 14 days. Needs macOS 14 or later.
The DataTally panel showing live download and upload speeds, today's totals, data used per app, and a seven-day history chart

What is it?

DataTally answers three questions: how fast is my connection right now, how much data have I used, and which apps are using it. Then it lets you do something about that.

Per-app breakdown

See how much different apps and services have used data today and in the past week.

Live speeds at a glance

Current download and upload throughput, over a sparkline of the last 90 seconds.

Block an app

Cut an app off the network entirely, or only while you're on a hotspot. Rules apply the moment you set them.

Hotspot data kept separate

On a Personal Hotspot or another metered connection, DataTally notices and counts that data apart from the rest.

Seven days of history

Daily totals in a small chart. Hover a day for its download and upload split, or click it to see which apps used the data.

History per app

Click any app to unfold its own week, so you can tell a one-off download from a steady drip.

Keep it on screen

Drag the panel away from the menu bar and it turns into a small window that floats above your other apps.

Nothing leaves your Mac

Usage is measured and stored on your machine. The app reaches the network only to look for its own updates, and only once you've allowed it to.

Light on the machine

A native Swift app that idles at a fraction of a percent of CPU. There's nothing to set up.

Cut an app off the network

Are some of your apps using too much data? Are you using a network connection with a limited data plan? Blocking an app from the network will save you bandwidth and avoid wasting money.

  • Allow lets the app use the network as usual.
  • Hotspot keeps it working on Wi-Fi and Ethernet, but off the network while you're tethered.
  • Blocked means no network access at all.

Set a rule from the app list in the panel, or open Manage Apps for everything DataTally has seen in the last 60 days. Anything else can be added straight from your Applications folder.

The first time you block something, macOS asks you to approve DataTally's network filter in System Settings. Until then nothing is filtered.

The Manage Apps window listing apps with their data usage and an Allow, Hotspot, or Blocked setting for each

Pricing

$9.99, once. No subscription. Free to try for 14 days. After that, live speeds and today's total stay free; the per-app breakdown, the history, and app blocking need a license.

Buy DataTally One license covers every Mac you use. The key arrives by email and activates offline.

Questions and answers

What does blocking need from macOS?

Your approval, once. The first time you block an app, macOS asks you to allow DataTally's network filter in System Settings. Nothing is filtered before that, and monitoring never needs it at all.

Can DataTally see what I'm sending?

No. The filter checks which app opened a connection, compares that against your rules, and allows or drops it. It doesn't inspect addresses or contents, and nothing about your traffic leaves your Mac.

Does it work with a VPN?

Yes. System totals are measured on your physical network interfaces (Wi-Fi, Ethernet, cellular), so an active VPN doesn't double-count traffic. The VPN's tunnel process appears in the app list alongside the apps it relays, exactly as Activity Monitor reports it.

Will it help me stay under a data cap?

Daily totals and the seven-day history make it easy to see how you're tracking, and hotspot data is counted separately so you know what went through the expensive connection. You can prevent individual apps from using data when you're connected to a hotspot.

How far back does it go?

DataTally keeps 60 days of daily records. The panel charts the last seven; Manage Apps totals everything it has for each app.

Does it need administrator rights or special permissions?

Monitoring doesn't. DataTally reads the same network statistics that macOS offers every app. Blocking uses a network filter system extension, which macOS installs only after you approve it, and only when you first block an app.

What happens when the trial ends?

Live speeds and today's total keep working as before. A one-time $9.99 license unlocks the per-app breakdown, the history, and app blocking. The key arrives by email and can be activated offline.

Is my usage recorded when DataTally isn't running?

No, it only measures while running. Turn on Launch at Login in the gear menu to keep tracking continuously.