This app keeps adultery secret!

TigerText enables the sender to set a lifespan for the message. Once this ends, the app erases the text from both the sender's and recipient's phones.

Costing 1.60-pound a month, the app is being marketed at people who need privacy and want to "cover their tracks", reports a major newspaper.

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It works only if the sender and recipient are both using Apple iPhones and have the app installed.

Paula Hall, a counsellor with Relate, said: "For couples where infidelity is a possibility, this just makes cheating easier.