Comparison

Opensignal Speed Test Ad Free vs NetMaster

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

Measure your mobile network performance with detailed speed tests for download, upload, and latency across 3G, 4G/LTE, 5G, and WiFi. Analyze video streaming quality and compare network coverage in your area to find the best provider.

Highlights
  • Download, upload, and latency speed tests
  • Video streaming quality analysis
  • Network coverage comparison
  • Signal strength and ping tests
  • Historical test logs
  • Connectivity maps
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

NetMaster

Features
Read full description

NetMaster helps explain slowdowns, instability, and intermittent dropouts without an account, ads, analytics, or tracking. RUN A COMPLETE NETWORK SCAN • Measure download and upload goodput with parallel HTTPS requests • See HTTPS latency, adjacent response-time variation, request failures, and a second latency vantage point • See confidence ranges and a p95 only when enough observations support it • Check direct UDP DNS response delivery across two providers, including bursts • Check latency under load and receive a bufferbloat grade • Compare everyday and first-time DNS response times • See the DNS transport observed for NetMaster’s measured request and compare resolver performance • Test real IPv4 and IPv6 reachability • Time the router hop and see whether added delay is local or farther upstream • Review public IP, ASN, egress region, TLS, HTTP, Wi-Fi security, captive-portal evidence, and tunnel indicators • Optionally install the bundled NetMaster Shortcut for connected iPhone Wi-Fi channel, standard, RSSI, noise, and RX/TX PHY rates — no compatible router or controller required • Watch live signal/noise, negotiated PHY rates, passive device traffic, and access-point changes • Compare the OS route gateway, Apple, Cloudflare, Google, and selected public-service latency graphs, rotating one probe at a time • Optionally select an M-Lab server for a separate single-flow route cross-check NARROW DOWN CONNECTION PROBLEMS Quick Diagnosis checks the path, router, internet, DNS, and responsiveness in sequence, then gives one likely explanation and a practical next step. INVESTIGATE INTERMITTENT DROPOUTS Run a 5-, 15-, or 30-minute monitor. On iOS 26, a user-started finite session can request lock-screen continuation; earlier versions must keep NetMaster visible. NetMaster records route changes, HTTPS heartbeats, gateway/DNS controls, IPv4/IPv6 evidence, latency changes, unknown gaps, and optional AP-roaming evidence. ESTIMATE ACTIVITY NEEDS Cautious assessments cover calls, 4K streaming, gaming, browsing, and uploads while naming the measured evidence and its limits. Protected history compares the same network over time, with a metrics-only mode. WATCH YOUR MAC FROM IPHONE Pair one iPhone to your Mac through private iCloud. See processor, memory, thermal, battery, and Mac traffic updates, 30-day history, eligible alerts, and PDF/CSV reports. Storage and low-storage findings remain visible only on the Mac. Remote speed tests require confirmation. BUILT FOR HONEST RESULTS A payload budget controls data use. Replenished parallel transfers target a stable window; when the cap ends a fast test too soon, the result is a lower bound, not a claimed maximum. Full-scan HTTPS timing is not ICMP ping; the separate live-latency board uses explicitly labeled ICMP echo. HTTPS adjacent response variation is not packet jitter; HTTPS request failures and UDP DNS response loss are not raw packet loss. PRIVACY BY DESIGN History stays in protected on-device storage. Optional Mac monitoring uses your private CloudKit database and no developer monitoring server. Reports leave only when you choose Share, with address redaction on by default. Important: Direct iOS app APIs omit exact radio values. The optional user-installed Shortcut uses Apple's Get Network Details action for connected RSSI, noise, channel, standard, and PHY rates; derived band can be ambiguous. Channel width, RF spectrum health, and cellular dBm are never invented. Wi-Fi identity needs permission. Balanced allows about 54.5 MB of throughput payload plus small requests and protocol overhead. Results are evidence, not proof that a router, carrier, VPN, or service is defective.

Screenshots

Opensignal Speed Test Ad Free4 screens
NetMaster2 screens

Verdict

The call

The clearest difference is update cadence: NetMaster at every 3 days against Opensignal Speed Test Ad Free's every 3 weeks. NetMaster also leads on device support (4 vs 2). Opensignal Speed Test Ad Free's advantage is iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases 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.

UpkeepUpdate frequency

Opensignal Speed Test Ad Free ships an update every 3 weeks, NetMaster every 3 days. Both last shipped on October 24, 2026.

Scorecard3 real differences · 7 level
Opensignal Speed Test Ad Free versus NetMaster: the parameters behind the verdict, then further details
ParameterOpensignal Speed Test Ad FreeNetMaster
PriceFreeFree
Rating4.5 (18K ratings) — better—
Positive reviews37.6% of reviews—
Number of ratings18K — better—
Update frequencyEvery 3 weeksEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, Mac, Apple TV — better
Requires iOS15.0 — better17.0
Further details — not scored
Size17 MB6 MB
Age rating4+4+
DeveloperOpensignal Inc.Jack Richmond

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

NetMaster

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Opensignal Speed Test Ad Free

No in-app purchases

None

NetMaster

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 NetMaster free?
NetMaster is free to download, with no in-app purchases.
Do Opensignal Speed Test Ad Free or NetMaster have ads?
Neither Opensignal Speed Test Ad Free nor NetMaster shows ads.
Which is updated more often, Opensignal Speed Test Ad Free or NetMaster?
Opensignal Speed Test Ad Free ships an update every 3 weeks, and NetMaster every 3 days. Most recently, Opensignal Speed Test Ad Free was updated on October 24, 2026 and NetMaster on October 24, 2026.

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