Comparison

SimpleLogin vs Perimeter

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

Head to head
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
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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/

About

Perimeter

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AWARENESS FOR THE CONNECTED WORLD Perimeter helps you understand the connected technology around you. Built with patent-pending technology, Perimeter observes supported wireless signals and helps identify patterns that may be consistent with potentially unwanted trackers, smart glasses, and other privacy-relevant devices—then surfaces what deserves your attention. QUIET MONITORING Perimeter can monitor supported Bluetooth activity in the background and notify you when a finding meets its alert criteria. When nothing meaningful appears, it stays out of the way. SCAN YOUR SURROUNDINGS Use Area Scan for a quick look at nearby Bluetooth activity and anything Perimeter believes deserves a closer look. CHECK A PLACE Take a closer look at a hotel, rental, room, or unfamiliar location using Bluetooth observations, local-network clues, and optional guided physical checks. JOURNEY MODE Look for relevant signals that persist as your surroundings change—helping distinguish something that stays with you from activity that simply happens to be nearby. SMART-GLASSES AWARENESS Perimeter can surface supported signal patterns that may be consistent with smart glasses, while clearly communicating the strength and limitations of the available evidence. FOUND A PHYSICAL TRACKER? Photograph what you found, check compatible NFC information, and review practical next steps. PRIVATE BY DESIGN Perimeter processes observations on your iPhone. No account is required, and your scan history and location context remain on your device. HONEST ABOUT LIMITATIONS Wireless detection has real limits. Perimeter cannot detect every tracker, camera, recorder, wearable, or surveillance method, and some nearby devices may produce no signal your iPhone can observe. Perimeter separates observation from identification and communicates uncertainty when the evidence is incomplete rather than guessing. Perimeter is designed to provide awareness, context, and practical next steps—not a guarantee that an environment is safe.

Screenshots

SimpleLogin4 screens
Perimeter4 screens

Verdict

The call

The clearest difference is in-app purchases: Perimeter at none against SimpleLogin's 2. Perimeter also leads on update cadence (every 2 days vs every 5 weeks). SimpleLogin's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads 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. Perimeter asks for nothing beyond the download.

UpkeepUpdate frequency

SimpleLogin ships an update every 5 weeks, Perimeter every 2 days. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

Scorecard4 real differences · 6 level
SimpleLogin versus Perimeter: the parameters behind the verdict, then further details
ParameterSimpleLoginPerimeter
PriceFreeFree
Rating4.9 (1.3K ratings) — better—
Positive reviews83.9% of reviews—
Number of ratings1.3K — better—
Update frequencyEvery 5 weeksEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size11 MB7 MB
Age rating4+4+
DeveloperProton AGClassy Methods

In-app purchases

2 purchases

SimpleLogin

Subscriptions2
  • Premium (monthly)$3.991 Month
  • Premium (yearly)$39.991 Year
None

Perimeter

No in-app purchases

Questions

Is SimpleLogin free?
SimpleLogin is free to download, with in-app purchases available.
Is Perimeter free?
Perimeter is free to download, with no in-app purchases.
Do SimpleLogin or Perimeter have ads?
Neither SimpleLogin nor Perimeter shows ads.
Which is updated more often, SimpleLogin or Perimeter?
SimpleLogin ships an update every 5 weeks, and Perimeter every 2 days. Most recently, SimpleLogin was updated on October 15, 2026 and Perimeter on October 8, 2026.

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