Kiren by F-Secure

In-app purchases
1.1M reviews
Content rating
Rated for 3+
100M+
Downloads
Content rating
Rated for 3+
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About this app

Online scams have never been more convincing. A store that looks real but never ships the order. A text that looks like it comes from your bank. A video of someone who never said those words. These are not aimed only at the careless. They are built to catch anyone, on an ordinary day, in the middle of an ordinary purchase or message.

Kiren is a premium digital safety app from F-Secure, made for exactly these moments. It helps you tell what is real from what is fake, and it keeps watch over your identity and your phone.

F-SECURE MOBILE SECURITY IS NOW KIREN
Kiren is the next version of F-Secure Mobile Security, built by the same team and completely redesigned.

CHECK BEFORE YOU ACT
• Link Checker: Confirm whether a link is safe before you open it. Shopping sites get a trust rating, useful before buying from an unfamiliar store.
• Message Checker: Paste in a suspicious text and find out in seconds whether it shows signs of a scam.
• Breach Check: See whether an email address has appeared in a known data breach.
• Your Apps: Analyse your apps to see exactly what they can access, so you can revoke permissions that put your privacy at risk.
• Quick Access to find, lock or wipe your lost device.

PROTECTION THAT RUNS IN THE BACKGROUND (Kiren Plus)
• Device scan: Antivirus makes it easy to identify, clean & remove viruses from your Android device. It checks new downloads and apps the moment they arrive, runs a daily scan, and removes threats.
• Personal data monitoring: Watches your email addresses, phone numbers, payment cards, and identity documents around the clock. If any of them appear in a new breach, you get an alert with full details and step-by-step guidance on what to do.
• Scam Scanner: Upload a screenshot of a listing, an offer, or a photo and Kiren's AI checks it for scam tactics and deepfake manipulation.
• Browsing Protection: Prevent cyber-criminals from redirecting you to malicious websites while using Chrome browser. Bank and shop with confidence with Safari Browser. Browsing Protection verifies that banking sites are real and rates online stores before you buy.
• Message Protection: Detects scam messages from unknown senders in SMS and WhatsApp, and gathers the harmful ones in one place. Conversations with your contacts are never analyzed.
• Breach Report: Get timely alerts whenever a company, app or service you use has a data breach along with info about how to best secure your data.

KEEP YOUR DEVICE IN GOOD SHAPE
• Device Health checks that a screen lock is set, the first line of defense if your phone is lost or stolen.
• Your Apps shows what each installed app can access, such as the camera, microphone, location, and contacts. An app with more access than it needs stands out.
• Recent News keeps you informed about data breaches and current scams.

BUILT WITH PRIVACY IN MIND
Your browsing events, checked messages, and app analysis are stored locally on your device.

FREE AND PLUS
Kiren Free includes Link Checker, Message Checker, Breach Check, the device lock check, Your Apps, and Security News.
Kiren Plus adds Browsing Protection, Message Protection, antivirus, personal data monitoring, and the Scam & Deepfake Scanner.

Kiren is made by F-Secure, protecting people online since 1988.

THIS APP USES ACCESSIBILITY SERVICES
This app uses Accessibility services. F-Secure uses the respective permissions with active consent from the end user.

The Accessibility permissions are used for the Chrome Protection features, in particular:
• To read website addresses for checking their safety on Chrome.

Kiren uses Android's VpnService for an upcoming web protection feature. When it is available, Kiren will create a local VPN on your device to check website addresses and block harmful sites. This feature is not active yet.
Antivirus, Identity Guard & Scam Protect. F-Secure Mobile Security is now Kiren.
Updated on
Nov 5, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Personal info
  • This app may collect these data types
    Location, Personal info and 4 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

1.06M reviews
VA Smith
November 6, 2026
I have found the recent change from F-Secure to Kiran disappointing. There seems to be just some fancy AI interfaces instead of security. F-Secure used to scan my Android phone, but that doesn't seem to be occurring. Additionally, I would receive an email alert that my phone being possibly stolen when my battery is low. With this new "update" I seem to have lost the security I used to have. I do not see any improvement, just AI slop and will be changing to another provider.
2 people found this review helpful
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Ryan Scott
November 2, 2026
They've turned the app into something entirely different, all my saved breach report sites are gone, and everything sucks now. Also: They got rid of their customer support email address, all the support is a chat bot now, and the "I forgot my password" thing does not work at all (and it's somehow not the same as it was back when this was Lookout, before it got acquired). Another once-useful app/service that is now trash. I guess I need to resort to a Stop Payment on my card to end my sub.
2 people found this review helpful
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F-Secure Corporation
November 4, 2026
Hello, we're sorry to hear about your frustrating experience with Kiren. We understand your concerns about missing breach report information, login difficulties, and accessing customer support. This isn't the experience we want you to have. We'll share your feedback with our team. Chameni / F-Secure
Abdsalam Saeed
November 2, 2026
Was better when it was Lookout. Almost pointless now. The main feature before the upgrade was that it could track my phone and make it screen or take a photo. Now it's just pointless garbage on there. Why get rid of the best features? Maybe they are there hidden in the new app but it's a paid subscription. If so, not interested. We pay for enough stuff. Don't waste your time
1 person found this review helpful
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F-Secure Corporation
November 5, 2026
Hello, we're sorry Kiren no longer meets your expectations. We understand how useful Lookout's phone tracking, remote alarm and photo capture features were. Unfortunately, these features are no longer available in Kiren. We appreciate your feedback and will share it with our team. Chameni / F-Secure

What’s new

What's new in Kiren 11.1.10

• Improved Japanese translations.
• Bug fixes and stability improvements.