Comparison

Opensignal Speed Test Ad Free vs Defender HD

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Opensignal Speed Test Ad Free

Analyze your mobile network performance with detailed speed tests for download, upload, and latency across 3G, 4G/LTE, 5G, and WiFi. Compare network providers in your area and assess video streaming quality for popular platforms. This tool helps you understand the true mobile connectivity you're receiving.

Highlights
  • Download, upload, and latency speed tests
  • Video streaming quality analysis
  • Network coverage comparison
  • Signal dashboard and ping test
  • Connectivity map
  • Historical test logs
Features
Read full description

Opensignal is a fully-featured mobile connectivity and network signal speed test tool. Speed test, including download, upload and latency - for 3G, 4G/LTE, 5G and WiFi Find the best network provider in your area. Compare coverage on Sprint, T-Mobile, AT&T and Verizon. Video streaming test - check streaming experience for Netflix, YouTube and others Compare what you’re paying for to what you’re actually getting by measuring connection quality on an Apple map with a database of signal and speed test results Completely free and no adverts. Our mission is to create an open-source map of connectivity so that everyone in the world can enjoy the best mobile connection available Features - Test tab with speed test and video streaming quality to analyze mobile video performance with results for time spent buffering, loading and playback - Signal dashboard and ping test - for testing latency response - Connectivity map to show locations of 3G and 4G/LTE tests - Network stats with average speeds for download, upload and latency and network strength on major providers - Historical log of your WiFi and 3G, 4G/LTE and 5G speed tests to check connectivity over time Opensignal Speed Tests Opensignal speed tests measure your real experience of mobile connectivity and signal. The speed test runs a 10 sec download test, 10 sec upload test and ping test to determine the speed you will likely experience. The speed test runs on common internet CDN servers. The result is calculated with the middle range of samples. Check if you're getting the network quality you're paying for from your mobile network or internet provider. Use our coverage maps to compare networks and data speed in your area. Opensignal works with WiFi mobile broadband internet. Video Speed Tests Slow video load time? Video buffering? More time waiting than watching? A good average network speed isn’t enough for a great video experience. Opensignal’s video test gives you the full picture of your network experience. Opensignal video tests show you exactly what to expect with HD and SD videos. Watch a 15 sec video snippet to test and log load time, buffering, and playback issues in real-time. Monitor how video quality changes with time and location. Review video test results in History to see if your network experience has changed over time. Coverage Map Opensignal’s coverage maps show signal strength down to street level using speed test and signal data from local users. With network stats on local network operators, you can check speeds ahead of a trip, find out if you will get a signal in remote areas, check your signal against others in the area to see if you’re getting the best service, arrange the best local SIM and check the signal strength when travelling. Improving Network Connectivity We provide an independent source of truth in mobile network experience: A data source that shows how users experience mobile network speeds, gaming, video and voice services worldwide. To do this, we collect data on the signal strength, network, location and other device sensors. You can stop this at any time in the settings. We share this data with network operators globally and others in the industry to drive better connectivity for all. Do Not Sell My Info: https://www.opensignal.com/ccpa

About

Defender HD

Access and manage your security system remotely from your smartphone or tablet. View live feeds, playback recorded footage, and receive motion detection alerts.

Highlights
  • View multiple DVRs
  • Live video feeds
  • Motion detection notifications
  • Playback recorded footage
  • Capture images and video
Features
Read full description

Defender HD enables users to view and interact with their security system using a smartphone or tablet device from anywhere. Add your system and view or interact with your footage all from the Defender HD app. The app's features enable the user to: • Add and view multiple DVRs simultaneously • View your live video feeds • Receive push notifications when motion is detected • Playback recorded footage • Capture images to smartphone/tablet • Capture video to smartphone/tablet Requirements: • Latest DVR firmware from www.defender-usa.com/support • Compatible only with Defender HD and Defender HD Wireless DVRs. • A high-speed internet connection and router (not included) • An internet connection providing an upload speed of at least 1Mbps is recommended for the best video performance

Screenshots

Opensignal Speed Test Ad Free4 screens
Defender HD3 screens

Verdict

The call

The clearest difference is rating: Opensignal Speed Test Ad Free at 4.5 against Defender HD's 3.3. Opensignal Speed Test Ad Free also leads on update cadence (every 3 weeks vs every 3 months) and ratings volume (18K vs 906). Defender HD's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Opensignal Speed Test Ad Free holds the better App Store score, 4.5 against 3.3. That said, the two scores are not equally well evidenced: Opensignal Speed Test Ad Free has 18K ratings behind it against 906, so its average is the more settled of the two. Written reviews point the same way: 38% of Opensignal Speed Test Ad Free's written reviews are positive against 25% of Defender HD's.

UpkeepUpdate frequency

Opensignal Speed Test Ad Free ships an update every 3 weeks, Defender HD every 3 months. The most recent releases landed on November 12, 2026 and November 6, 2026 respectively.

Scorecard5 real differences · 5 level
Opensignal Speed Test Ad Free versus Defender HD: the parameters behind the verdict, then further details
ParameterOpensignal Speed Test Ad FreeDefender HD
PriceFreeFree
Rating4.5 (18K ratings) — better3.3 (906 ratings)
Positive reviews37.8% of reviews — better24.8% of reviews
Number of ratings18K — better906
Update frequencyEvery 3 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.012.0 — better
Further details — not scored
Size18 MB133 MB
Age rating4+4+
DeveloperOpensignal Inc.Empowerment Technologies Inc.

Customer experience

Opensignal Speed Test Ad Free

All ratings17,901 ratings
Positive88.5%
Neutral4.8%
Negative6.7%
Written reviews944 reviews
Positive37.8%
Neutral10.9%
Negative51.3%

Defender HD

All ratings904 ratings
Positive56.1%
Neutral9.4%
Negative34.5%
Written reviews165 reviews
Positive24.8%
Neutral9.7%
Negative65.5%

User reviews

Opensignal Speed Test Ad Free

From 18K App Store ratings

What we love

  • 🚀 Reset Stats
  • 🚀 Useful practical tool
  • 🚀 Simple, clean interface
  • 🚀 Features and Navigate
  • 🚀 Works well

Room to improve

  • 🐛 What he** have they done?
  • 🐛 Open signal tower loc not working
  • 🐛 Tower location option
  • 🐛 Directional Arrow not working
  • 🐛 Can no longer point towers

Defender HD

From 906 App Store ratings

What we love

  • 🚀 Lightning-fast load times
  • 🔒 Robust security features
  • 👍 Easy to set up and use
  • 💡 Useful remote access capabilities

Room to improve

  • 🐛 Frequent crashes and connectivity issues
  • 🔍 Unreliable motion detection and alerts
  • 📺 Incompatible with some devices and operating systems
  • 🕰️ Slow camera load times and video playback

Bugs and requests

Opensignal Speed Test Ad Free

Reported bugs

20 issues
  • History is all screwed up, dates don't make sense
  • Open signal tower loc not working
  • Tower location option not working
  • Directional Arrow not working
  • Can no longer point towers
Show 15 more
  • No cell tower located
  • Broken in latest release, no tower data
  • Still can't find cell tower, even in city
  • Celltower location does not work for iPhone devices
  • No cell tower info
  • Compass Directional Arrow not working
  • Odd results with tower location
  • Tower locator doesn't work
  • Shows 5G as 4G
  • Doesn't monitor drops
  • Strange issue with no towers showing
  • Doesn't actually identify cell towers
  • Upload test consistently fails
  • Crashes
  • Refreshing carriers not working

Requested features

9 requests
  • Reset Stats
  • Tower location option
  • Dark mode option
  • Advanced analytics dashboard
  • Cell tower compass
Show 4 more
  • Distance to tower
  • Ability to test 1080p and 4K video
  • Show all nearby towers on map
  • Ability to change carrier filter

Defender HD

Reported bugs

4 issues
  • Login screen freezes or fails to load
  • Cameras randomly go offline or disappear from the app
  • Notifications and alerts not working as expected
  • Compatibility issues with newer iOS and Android versions

Requested features

4 requests
  • Improved motion detection and customizable alerts
  • Remote camera control and adjustment options
  • Seamless integration across all devices
  • Enhanced video playback and export capabilities

In-app purchases

None

Opensignal Speed Test Ad Free

No in-app purchases

None

Defender HD

No in-app purchases

Questions

Is Opensignal Speed Test Ad Free free?
Opensignal Speed Test Ad Free is free to download, with no in-app purchases.
Is Defender HD free?
Defender HD is free to download, with no in-app purchases.
Which has better reviews, Opensignal Speed Test Ad Free or Defender HD?
Opensignal Speed Test Ad Free is rated higher. Opensignal Speed Test Ad Free averages 4.5 out of 5 from 18K ratings, while Defender HD averages 3.3 from 906 ratings.
Do Opensignal Speed Test Ad Free or Defender HD have ads?
Neither Opensignal Speed Test Ad Free nor Defender HD shows ads.
Which is updated more often, Opensignal Speed Test Ad Free or Defender HD?
Opensignal Speed Test Ad Free ships an update every 3 weeks, and Defender HD every 3 months. Most recently, Opensignal Speed Test Ad Free was updated on November 12, 2026 and Defender HD on November 6, 2026.

Other comparisons