You're about to run a speed test, and you want accurate numbers. But there's a problem — dozens of apps are quietly eating your bandwidth in the background. Cloud backups, software updates, streaming tabs, and chat apps all steal bits of your connection without you noticing. Closing them before testing is the single easiest way to get results that actually reflect your internet plan's performance.
Why Background Apps Mess Up Your Speed Test
When you run a speed test, the tool tries to measure how fast data travels between your device and a server. It sends and receives chunks of data, then calculates your download speed, upload speed, and latency. The test assumes it has your full connection to work with.
Background apps break that assumption. If Dropbox is uploading 200 photos while you test, your upload speed will look terrible — not because your connection is slow, but because it's busy. The speed test only measures what's left over after other apps take their share.
It's not just big downloads
You might think a single chat app can't make a difference. But small apps add up fast. A video call uses 2–4 Mbps. A music stream takes another 0.5–1.5 Mbps. Windows Update might quietly pull 10–20 Mbps. Browser tabs with auto-refreshing content (like social media feeds or news sites) each nibble away at your bandwidth. Stack five or six of these together, and you've lost 15–30 Mbps before your test even starts.
Upload speed gets hit the hardest
Most home internet plans give you way less upload speed than download speed. A typical cable plan might offer 300 Mbps down but only 10 Mbps up. That means even a small background upload — like iCloud syncing your photos — can eat 30–50% of your upload capacity. If your upload numbers seem low, check out our guide on what counts as a good upload speed and compare your results.
The Biggest Bandwidth Hogs to Close
Not all apps use the same amount of bandwidth. Here's a breakdown of the most common offenders and how much they typically consume:
| App / Service | Typical Bandwidth Used | Impact on Test |
|---|---|---|
| Windows/macOS Updates | 10–50 Mbps (download) | Very High |
| Cloud Backup (Dropbox, iCloud, Google Drive) | 5–30 Mbps (upload) | Very High |
| Video Streaming (Netflix, YouTube) | 3–25 Mbps (download) | High |
| Video Calls (Zoom, Teams) | 2–4 Mbps (both directions) | High |
| Game Downloads/Updates (Steam, Xbox) | 10–100 Mbps (download) | Very High |
| Music Streaming (Spotify, Apple Music) | 0.5–1.5 Mbps (download) | Low |
| Chat Apps (Slack, Discord, WhatsApp) | 0.1–0.5 Mbps | Low |
| Browser Tabs (10+ open) | 1–5 Mbps (combined) | Medium |
Focus on the "Very High" and "High" impact items first. A single Steam download can use your entire connection, making your speed test results almost meaningless.
Step-by-Step: How to Close Background Apps
On Windows
- Press Ctrl + Shift + Esc to open Task Manager.
- Click the "Network" column header to sort by network usage.
- Look for anything using more than 0.1 Mbps. Right-click it and select "End Task."
- Check the system tray (bottom-right corner) for hidden apps like Dropbox, OneDrive, or antivirus software doing scans.
- Temporarily pause Windows Update: go to Settings → Windows Update → Pause updates.
On macOS
- Open Activity Monitor (search for it in Spotlight with Cmd + Space).
- Click the "Network" tab to see which apps are sending or receiving data.
- Select any app using significant bandwidth and click the X button to quit it.
- Check the menu bar for cloud sync icons (iCloud, Dropbox, Google Drive) and pause syncing.
On phones and tablets
Mobile devices are sneaky bandwidth users. Before testing on your phone, close all open apps from the app switcher. On iOS, swipe up and swipe away each app. On Android, tap the recent apps button and clear all. Also turn off auto-updates: on iPhone, go to Settings → App Store → turn off App Updates. On Android, open the Play Store → Settings → Auto-update apps → Don't auto-update.
Don't Forget Other Devices on Your Network
Here's something people miss: closing apps on your computer isn't enough if your kid is streaming 4K video on a tablet in the next room. Every device on your Wi-Fi network shares the same internet connection. A single 4K stream uses about 25 Mbps. Two smart TVs, a gaming console, and a couple of phones can easily consume 50–80 Mbps combined.
For the most accurate test, either ask everyone to stop using the internet for 60 seconds, or test during a time when fewer people are online — early morning works well. If you're seeing lower speeds than expected even after closing everything, our guide on why your internet might be slow covers other common causes.
A quick trick: use a wired connection
Wi-Fi itself adds variability to your results. Walls, distance from the router, and interference from other networks all affect Wi-Fi speed. If you want the cleanest possible test, plug your computer directly into your router with an ethernet cable. This removes Wi-Fi as a variable entirely. You'll often see speeds jump by 20–40% just from switching to a wired connection.
How Much Difference Does Closing Apps Actually Make?
We've seen users report wildly different results depending on what's running. Here's a real-world example of what a 300 Mbps plan might look like:
| Scenario | Download Speed | Upload Speed | Ping |
|---|---|---|---|
| Everything running (typical) | 145 Mbps | 4 Mbps | 38 ms |
| Background apps closed on test device | 260 Mbps | 9 Mbps | 22 ms |
| All devices idle + wired connection | 295 Mbps | 10.5 Mbps | 12 ms |
Notice the ping difference too. Background apps don't just eat bandwidth — they also increase latency. When your network is congested, data packets have to wait in line, which raises your ping. Going from 38 ms to 12 ms is a huge improvement, especially if you game or video call regularly.
If your results still seem off after closing everything, check whether your ISP is delivering what you're paying for. Our guide on speeds lower than your plan walks through other possible causes like network congestion, outdated equipment, or throttling.
Quick Pre-Test Checklist
Before you hit the test button, run through this list. It takes about 30 seconds and makes your results far more reliable:
- Close all browser tabs except the speed test page.
- Quit cloud sync apps (Dropbox, OneDrive, iCloud, Google Drive).
- Pause any active downloads or updates.
- Close video and music streaming apps.
- End any video calls.
- Check Task Manager (Windows) or Activity Monitor (Mac) for hidden network activity.
- Ask others on your network to pause heavy usage for a minute.
- If possible, connect via ethernet instead of Wi-Fi.
Getting accurate speed test results comes down to one principle: give the test your full connection. Close your background apps, pause other devices, and you'll get numbers that truly show what your internet can do. Run 2–3 tests in a row and average the results for even better accuracy. If the numbers still don't match your plan, that's useful information too — it means the problem is somewhere between your ISP and your router, not on your device.