Kiren by F-Secure

In-app purchases
1.1M reviews
Content rating
PEGI 3
100M+
Downloads
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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
Oct 23, 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
Andy Lloyd
August 6, 2026
I've been running this app over multiple Android devices for 15 years, and in the main it has been great. However I'm frustrated that the VPN on the paid for version is always on. This causes problems with a few services and with hardware that connects via WiFi. Surely it must be possible to add a toggle so I can turn this off when I don't need it!
5 people found this review helpful
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F-Secure Corporation
August 10, 2026
Thank you for being a long-time user! We’re glad the app has served you well. We understand your frustration with the VPN affecting some services and Wi-Fi devices. We appreciate your suggestion for a simple toggle and will share this feedback with our product team. 🙏
John Harding
March 18, 2023
Had this app installed on my phones for several years now. I know it is working there in the background but unobtrusively (I do pay for it but it is worth it) and the phones have remained trouble free all this time. The above is still true but the method for paying the subscription changed recently. I tried several times to renew it but failed each time and could get little guidance on what was going wrong. So I have had to abandon the app altogether.
93 people found this review helpful
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Ashley Corn
June 30, 2023
Have been using this app for as long as I can remember as I get it as part of my insurance with EE!! However the last 7-8 months I've been getting charged for the premium membership yet not getting it! I've only been getting the free version!! This is the first time this has happened. EE are useless and have no clue, It can't be removed from my bill so I'm going to continue getting charged for a service/app that I'm not getting the FULL use from!
21 people found this review helpful
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F-Secure Corporation
July 13, 2023
Have you contacted our Support team about this? We can get this sorted out for you. Please contact us at https://bit.ly/2lE3hni

What’s new

What's new in Kiren 11.1.9

• Use Kiren in more languages.
• Clearer results when you check your email for breaches.
• Bug fixes and stability improvements.