Kiren by F-Secure
Kiren by F-Secure has 416,124,685 installs, rated 4.1 from 1,098,620 ratings, #77 of 235,309 in Tools.
Also in the last two weeksv11.1.10 on 5 Nov
Description
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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.
Reviews The reviews Google Play shows first (its most relevant), from the US store, in any language.
From 1,098,613 ratings.
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★★★★★ Ramazan Al Sodais Cosmetics · 5 Oct 2026 · v10.58-c956ec4have downloaded this aap as my Android phone security, but it's changed the plan scanning and protections i am facing unknown url or web spam marvel something damaged 3 device i request Android developer please protect my accounts and device 😢 🙏
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★☆☆☆☆ Paul James Chatman · 5 Oct 2026 · v10.58-c956ec4As of September 2026 ALL T-MOBILE PREMIUM SUBSCRIPTIONS HAVE BEEN CANCELLED. My app and account NO LONGER identify as Premium. They now want 60$ a year to use their new AI Kiren. Bye!!Developer reply · 5 Oct 2026Hello, We understand your frustration, especially after being a T-Mobile Premium customer. We’re sorry the changes to your subscription and the transition to Kiren have affected your experience. Your feedback about the subscription changes and pricing will be shared with our team. Thank you for sharing your experience. Regards Chameni / F-Secure
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★☆☆☆☆ Liz S · 5 Oct 2026 · v10.58-c956ec4I had a full version app under F-Secure from my phone carrier for free now I have to pay for features I already had and not have to pay for more protection. this doesn't make sense I'll have to remove it if I don't get my free full version app back. I have been with you before the different name changes never had to go through this so disappointed
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★★☆☆☆ M O · 5 Oct 2026 · v10.58-c956ec4it came installed on my Samsung Galaxy Tab S11 but closes immediately on opening, told me to clear cache, check for updates n reinstall but still closes when trying to order, it's says it has a bug n to wait for developer to fix..That is the crash message...There is a Bug & wait for the Developer to fix,,,this was the crash screen,,,,There is a Bug & wait for the Developer to fixDeveloper reply · 5 Oct 2026Sorry F-Secure Mobile Security is closing immediately on your Samsung Galaxy Tab S11. Since you’ve already cleared the cache, checked for updates, and reinstalled it, and Android reports a bug requiring a developer fix, this may need further investigation. Please send us a screenshot of the crash message so we can investigate further.
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★☆☆☆☆ Deanna Morgan · 5 Oct 2026 · v11.1.5Is it Kiran or spelled wrong Kiren security???
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★★★★☆ mary lev · 4 Oct 2026 · v10.49.1-4a6a9c1been notified f secure is becoming Kiren. No VPN like F secure included. Not happy. Tmobile dropped F secure. Now, I need to worry about the billing because tmobile always billed me for it. No VPN.Developer reply · 5 Oct 2026Hello, We understand your frustration, especially with the change from F-Secure and the loss of VPN features. We’re sorry for the inconvenience this transition has caused. For billing questions related to your T-Mobile subscription, please contact T-Mobile directly, as they handle the billing for this service. Regards Chameni / F-Secure
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★☆☆☆☆ Paul Chatman · 3 Oct 2026 · v10.21.1-71c0cca10/2026: They REMOVED T-MOBILE PREMIUM SUBSCRIPTIONS!! 9/2026: Just saw the email that they're doing what NOBODY asked for by COMPLETELY changing the app so it relies solely on their Kiren AI. Don't fix, what isn't broke. App doesn't need a AI makeover. 2025-2020: Got Premium with my T-Mobile subscription. I had my subscription since December 2014. I've had it since it was just Lookout, then Lookout Life, now F-Secure. To me I've experienced no significant change except the name.Developer reply · 5 Oct 2026Hello, We understand your frustration, especially after using the service since 2014. We’re sorry the removal of T-Mobile Premium and transition to Kiren have affected your experience. Your feedback about these changes and the new direction of the app will be shared with our team. Regards, Chameni / F-Secure
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★☆☆☆☆ Susan Gatta · 3 Oct 2026 · v11.1.5don't like the new app for F-Secure Mobile, I prefer the older app, F-Secure Mobile app,Kiern Mobile app is not downloading to my status bar, I can't even purchase the new app,Developer reply · 5 Oct 2026Hello, We’re sorry the new Kiren app hasn’t met your expectations. We understand your concerns about the status bar and difficulties purchasing the new app. Please contact our support team so we can help with your specific issue. We appreciate your feedback and will share it with our team. Regards Chameni / F-Secure
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★★☆☆☆ Peter Jones · 3 Oct 2026 · v11.1.5It was good until it became something called Kiren, I paid for a years subscription which promptly disappeared when it became Kiren without my permission . A rip off for sure, it's appears to have gone from £20 to 60 also for the same thingDeveloper reply · 5 Oct 2026Hi, We’re sorry to hear about your experience with the transition to Kiren. We understand how frustrating it is when a paid subscription appears to change unexpectedly. Please contact our support team so we can check your subscription and help clarify what happened. Regards Chameni / F-Secure
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★☆☆☆☆ Pet Wind · 3 Oct 2026 · v10.58-c956ec4used to be lookout and used to have that you could find your phone if it was lost and a way of wiping it all that disappeared without any notice and when I went to try to go to the website and no longer was there very disappointed went to a bit defender which I'm much more happier withDeveloper reply · 5 Oct 2026Hi, We’re sorry to hear how disappointed you are, especially after using the app since its Lookout days. We understand how important the lost-phone location and remote wipe features were, and we apologize for the frustration caused by their removal. Thank you for sharing your experience and for your years of support. Regards Chameni / F-Secure
Search Android reviews - every stored review from the store, not only this listing's.
Growth change in installs
| Per | Growth | Growth % | Actual change | Measured over |
|---|---|---|---|---|
| day | Not enough history yet | |||
| week | +33,264 | +0.0% | +37,535 | 7.9 days |
| month | +158,746 | +0.0% | +219,188 | 41.4 days |
| year | Not enough history yet | |||
How these figures are measured
Change in installs, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.
Ratings were removed in Oct 2026, Nov 2026; shown as 0.
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