Comparison

OONI Probe vs 1Cert

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

Head to head
About

OONI Probe

This app helps you detect internet censorship and surveillance systems by examining website and app blocking. It also measures your network's speed and performance, providing data that can serve as evidence of interference. All collected data is published openly to promote transparency.

Highlights
  • Examine website and app blocking
  • Measure network speed and performance
  • Detect censorship and surveillance systems
  • Collect evidence of internet censorship
  • Publish open network measurement data
  • Free and open source software
Features
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Are websites and social media apps blocked? Is your network unusually slow? Run OONI Probe to find out! With this app, you will examine the blocking of websites and instant messaging apps, measure your network's speed and performance, and check whether systems that could be responsible for censorship and surveillance are in your network. OONI Probe is developed by the Open Observatory of Network Interference (OONI), a free software project (under The Tor Project) that aims to uncover internet censorship around the world. Since 2012, OONI’s global community has collected millions of network measurements from more than 200 countries, shedding light on multiple cases of network interference. ▶ Collect evidence of internet censorship You can check whether and how websites and instant messaging apps are blocked. The network measurement data you will collect may serve as evidence of internet censorship. ▶ Detect systems responsible for censorship and surveillance OONI Probe tests are also designed to uncover the presence of systems (middleboxes) that could be responsible for censorship and surveillance. ▶ Measure the speed and performance of your network You can measure the speed and performance of your network by running OONI's implementation of the Network Diagnostic Test (NDT). You can also measure video streaming performance with the Dynamic Adaptive Streaming over HTTP (DASH) test. ▶ Open data OONI publishes network measurement data because open data allows third parties to verify OONI findings, conduct independent studies, and answer other research questions. Openly publishing OONI data also helps increase transparency of internet censorship around the world. You can explore and download OONI data here: https://ooni.io/data/ ▶ Free software All OONI Probe tests (including our NDT and DASH implementations), are based on free and open source software. You can find OONI software projects on GitHub: https://github.com/ooni. Curious to learn how OONI Probe tests work? Learn more: https://ooni.io/nettest/ To receive updates from the OONI-verse, follow us on Twitter: https://twitter.com/OpenObservatory

About

1Cert

Features
Read full description

1Cert is a secure credential verification and compliance platform for companies. Instantly verify credentials, manage site requirements, and share verified records with confidence.

Screenshots

OONI Probe4 screens
1Cert4 screens

Verdict

The call

OONI Probe and 1Cert are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.

ScorecardNo meaningful differences
OONI Probe versus 1Cert: the parameters behind the verdict, then further details
ParameterOONI Probe1Cert
PriceFreeFree
Rating4.5 (91 ratings) — better—
Positive reviews59.4% of reviews—
Number of ratings91 — better—
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size139 MB31 MB
Age rating4+4+
DeveloperThe Tor ProjectSureHire Inc.

In-app purchases

None

OONI Probe

No in-app purchases

None

1Cert

No in-app purchases

Questions

Is OONI Probe free?
OONI Probe is free to download, with no in-app purchases.
Is 1Cert free?
1Cert is free to download, with no in-app purchases.
Do OONI Probe or 1Cert have ads?
Neither OONI Probe nor 1Cert shows ads.
Which is updated more often, OONI Probe or 1Cert?
OONI Probe ships an update every 2 months, and 1Cert every 2 months. Most recently, OONI Probe was updated on November 2, 2026 and 1Cert on October 25, 2026.

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