Comparison

TLS Inspector vs OONI Probe

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

Head to head
About

TLS Inspector

Inspect TLS certificates for any domain or IP address to understand trust and safety. Detect man-in-the-middle attacks by highlighting invalid certificates. Access detailed certificate properties and integrate with your browser.

Highlights
  • Input domain or IP for inspection
  • Inspect websites via browser extension
  • View entire issue chain and trust status
  • Detailed TLS certificate properties
  • Detect man-in-the-middle attacks
  • Share sheet integration with Safari
Features
Read full description

Trust & Safety in the palm of your hand. • Input & Inspect. It's really that simple. Input a domain or IP address using the TLS Inspector app, or inspect any website from within your favourite browser using our Inspect Website extension. • No Nonsense Results. "At a glance" has never been easier. TLS Inspector will show you the entire issue chain for any website, and whether or not your device trusts that chain. • Dive Deep. Details for days. View important properties of any TLS certificate including fingerprints, dates, algorithms, and more. • Stay Safe Online. No training required. TLS Inspector makes it easy to detect and avoid man-in-the-middle attacks on unsafe networks by highlighting invalid and untrustworthy certificates. • Right Place, Right Time. Inspect nearly anything from anywhere. Easily access TLS Inspector from other apps, such as Safari, with the Show Certificates share sheet action. TLS Inspector is free & libre open source software (FLOSS) with source code available on GitHub. TLS Inspector is made entirely without the use of Artificial Intelligence (AI) or Large Language Models (LLMs).

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
Read full description

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

Screenshots

TLS Inspector4 screens
OONI Probe4 screens

Verdict

The call

The clearest difference is review sentiment: TLS Inspector at 83% against OONI Probe's 58%. TLS Inspector also leads on rating (4.8 vs 4.5) and ratings volume (256 vs 84). On price, update cadence, 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.

ReceptionRating · Positive reviews · Number of ratings

TLS Inspector holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 256 and 84 respectively. Written reviews point the same way: 83% of TLS Inspector's written reviews are positive against 58% of OONI Probe's.

UpkeepUpdate frequency

TLS Inspector ships an update monthly, OONI Probe every 2 months. The most recent releases landed on August 5, 2026 and September 22, 2026 respectively.

Scorecard3 real differences · 7 level
TLS Inspector versus OONI Probe: the parameters behind the verdict, then further details
ParameterTLS InspectorOONI Probe
PriceFreeFree
Rating4.8 (256 ratings) — better4.5 (84 ratings)
Positive reviews83.0% of reviews — better58.1% of reviews
Number of ratings256 — better84
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.014.0 — better
Further details — not scored
Size18 MB138 MB
Age rating4+4+
DeveloperIan SpenceThe Tor Project

Customer experience

TLS Inspector

All ratings257 ratings
Positive95.3%
Neutral0.8%
Negative3.9%
Written reviews47 reviews
Positive83.0%
Neutral6.4%
Negative10.6%

OONI Probe

All ratings84 ratings
Positive85.7%
Neutral7.1%
Negative7.1%
Written reviews31 reviews
Positive58.1%
Neutral12.9%
Negative29.0%

Bugs and requests

TLS Inspector

Reported bugs

5 issues
  • App crash issue fixed
  • Share extension 'inspect website' never works
  • Error checking for TLS bundle updates
  • App freezes
  • App locks up, non functional

Requested features

3 requests
  • Continue making app great and helpful
  • Add dark mode option
  • More advanced features

OONI Probe

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

TLS Inspector

No in-app purchases

None

OONI Probe

No in-app purchases

Questions

Is TLS Inspector free?
TLS Inspector is free to download, with no in-app purchases.
Is OONI Probe free?
OONI Probe is free to download, with no in-app purchases.
Which has better reviews, TLS Inspector or OONI Probe?
TLS Inspector is rated higher. TLS Inspector averages 4.8 out of 5 from 256 ratings, while OONI Probe averages 4.5 from 84 ratings.
Do TLS Inspector or OONI Probe have ads?
Neither TLS Inspector nor OONI Probe shows ads.
Which is updated more often, TLS Inspector or OONI Probe?
TLS Inspector ships an update monthly, and OONI Probe every 2 months. Most recently, TLS Inspector was updated on August 5, 2026 and OONI Probe on September 22, 2026.

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