Comparison

OONI Probe vs SimpleLogin

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
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

About

SimpleLogin

Create temporary, anonymous email addresses to protect your personal inbox from spam and tracking. Forward emails to your main inbox and reply from your alias, keeping your real address hidden. Easily disable aliases if they receive unwanted messages.

Highlights
  • Create anonymous email aliases
  • Forward emails to personal inbox
  • Reply from alias address
  • Send emails from alias
  • Disable aliases to block spam
  • PGP encryption support
  • Use custom domains
Features
Read full description

Tired of spam and being tracked online through your personal email address? Email aliases are the solution. SimpleLogin provides you with a different anonymous email address (aka email alias) whenever you sign up for a new online service, allowing you to hide your personal email address from spammers. Emails sent to an alias are forwarded to your personal inbox. Want to reply to a forwarded email? Just hit reply and the response will be sent from your alias, keeping your personal address hidden. Not only can an alias receive emails, it can also send emails. An alias is a full-fledged email address. You can create a new alias when subscribing to a newsletter, signing up for a new account, or giving your email to someone you don't trust. If you receive spam to that address, simply disable the alias. When you give away your personal email online, there is a good chance it will end up in the hands of a spammer or hacker. SimpleLogin acts as a firewall to protect your personal inbox. Over 2 million SimpleLogin aliases have been created, making SimpleLogin one of the world’s best-known email alias services. --- Why SimpleLogin? - Generous free plan: unlike other alias services, you can create up to 10 aliases using the free plan, and there's no cap on bandwidth or the number of replies and sends. We also offer a 7day free trial of our premium service, that includes all advanced features, when you sign up. - SimpleLogin is the world’s most advanced email alias service, supporting multiple mailboxes, PGP encryption, and in-app alias management. - 100% open source and independently audited for security. SimpleLogin is verified to be secure and reliable. - Private by default. SimpleLogin forwards your emails, but does not save them. We use secure infrastructure in Switzerland, operated by Proton Mail, the world's largest encrypted email service. With a premium plan, you can: - Add your own domain and create aliases such as reddit@my-domain.com or twitter@my-domain.com. You can also enable catch-all email addresses for your domain. - If you don't have a domain, use a subdomain provided by SimpleLogin instead. - Send emails from aliases: not only can you can reply to a forwarded email, you can also initiate a new conversation from your alias. - If you have several mailboxes, you can add them into SimpleLogin and choose which one to use when creating an alias. - If your mailbox supports PGP, enable PGP on SimpleLogin, and emails will be encrypted by SimpleLogin before being forwarded to your mailbox. What others say about SimpleLogin: “SimpleLogin is a comprehensive disposable email address solution that covers just about every conceivable feature, and it’s easy to use”. PCMag Twitter: https://twitter.com/simple_login Reddit: https://www.reddit.com/r/simplelogin Open Source: https://github.com/simple-login Privacy policy: https://simplelogin.io/privacy/ Terms and conditions: https://simplelogin.io/terms/ Security audit: https://simplelogin.io/blog/security-audit/

Screenshots

OONI Probe4 screens
SimpleLogin4 screens

Verdict

The call

The clearest difference is in-app purchases: OONI Probe at none against SimpleLogin's 2. SimpleLogin's advantage is rating (4.9 vs 4.5) and review sentiment (84% vs 58%). On price, update cadence, ads and device support 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. SimpleLogin sells 2 in-app purchases, starting at $3.99 per month. OONI Probe asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SimpleLogin holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: SimpleLogin has 1.3K ratings behind it against 88, so its average is the more settled of the two. Written reviews point the same way: 58% of OONI Probe's written reviews are positive against 84% of SimpleLogin's.

UpkeepUpdate frequency

OONI Probe ships an update every 2 months, SimpleLogin every 5 weeks. The most recent releases landed on September 29, 2026 and September 28, 2026 respectively.

Scorecard5 real differences · 5 level
OONI Probe versus SimpleLogin: the parameters behind the verdict, then further details
ParameterOONI ProbeSimpleLogin
PriceFreeFree
Rating4.5 (88 ratings)4.9 (1.3K ratings) — better
Positive reviews58.1% of reviews83.8% of reviews — better
Number of ratings881.3K — better
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size139 MB11 MB
Age rating4+4+
DeveloperThe Tor ProjectProton AG

Customer experience

OONI Probe

All ratings88 ratings
Positive86.4%
Neutral6.8%
Negative6.8%
Written reviews31 reviews
Positive58.1%
Neutral12.9%
Negative29.0%

SimpleLogin

All ratings1,318 ratings
Positive96.9%
Neutral1.1%
Negative2.0%
Written reviews284 reviews
Positive83.8%
Neutral5.3%
Negative10.9%

In-app purchases

None

OONI Probe

No in-app purchases

2 purchases

SimpleLogin

Subscriptions2
  • Premium (monthly)$3.991 Month
  • Premium (yearly)$39.991 Year

Questions

Is OONI Probe free?
OONI Probe is free to download, with no in-app purchases.
Is SimpleLogin free?
SimpleLogin is free to download, with in-app purchases available.
Which has better reviews, OONI Probe or SimpleLogin?
SimpleLogin is rated higher. OONI Probe averages 4.5 out of 5 from 88 ratings, while SimpleLogin averages 4.9 from 1.3K ratings.
Do OONI Probe or SimpleLogin have ads?
Neither OONI Probe nor SimpleLogin shows ads.
Which is updated more often, OONI Probe or SimpleLogin?
OONI Probe ships an update every 2 months, and SimpleLogin every 5 weeks. Most recently, OONI Probe was updated on September 29, 2026 and SimpleLogin on September 28, 2026.

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