You get a text that claims to be from your bank, and the link looks almost right. Kiren, from F-Secure Corporation, is built for that moment. It replaces F-Secure Mobile Security and has over 100 million installs on Google Play.
Who Kiren fits: people who shop and chat on a phone
The app suits anyone who buys from unfamiliar online stores or gets messages from unknown senders. Its checks are aimed at scams, not only at malware, so it covers daily habits like tapping links and answering texts.
The content rating is Everyone, and the app shows no ads. It needs Android 11 or newer.
Link Checker, Message Checker and Scam Scanner in use
Link Checker tells you whether a link is safe before you open it, and shopping sites receive a trust rating. Message Checker takes a pasted text and reports within seconds if it shows signs of a scam.
Scam Scanner works from an uploaded screenshot or photo, such as a listing or an offer. Its AI looks for scam tactics and deepfake manipulation. Message Protection flags scam messages from unknown senders in SMS and WhatsApp and collects the harmful ones in one place. Chats with your contacts are not analyzed.
Breach Check looks up an email address in known data breaches. Your Apps lists what each installed app can reach, so you can revoke permissions. Quick Access lets you find, lock or wipe a lost device.
What the free version leaves out and where data stays
Kiren has in-app purchases, and the background features sit under a paid plan called Kiren Plus. These include the daily device scan, personal data monitoring and Browsing Protection.
F-Secure says browsing events, checked messages and app analysis are stored locally on the device. Google Play shows a 4.1 rating from about 1.1 million ratings.
What's new in 11.1.10
The current version is 11.1.10, updated on October 30, 2026.
Kiren by F-Secure pros and cons
Pros
- Checks links, pasted texts and screenshots for scams
- Message Protection covers SMS and WhatsApp without analyzing contact conversations
- Your Apps shows which permissions each app holds
- No ads, and the app is rated Everyone
- Rated 4.1 on Google Play by about 1.1 million people
Cons
- Daily scans, data monitoring and Browsing Protection need the paid Kiren Plus plan
- Requires Android 11 or newer
- Free plan contents are not fully listed in the available data
Is Kiren by F-Secure safe?
Kiren is made by F-Secure Corporation, the team behind F-Secure Mobile Security. Message Protection only looks at texts from unknown senders in SMS and WhatsApp, and conversations with your contacts are never analyzed. The app carries no ads, and the premium features are unlocked through in-app purchases.
How to install Kiren by F-Secure
- Press the Google Play button on this page.
- Check the listing in the Play Store and press Install.
- Open Kiren by F-Secure when the install finishes. Updates arrive through Google Play.
