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A Dutch company has developed a smartphone app for recording consensual sex during a one-night stand.

LegalFling requires both individuals to agree to a legally-binding contract, including things like whether or not they will use a condom and that neither has any sexually-transmitted infections.

The app logs the contract and records it on blockchain technology - the same encrypted technology that forms the basis for bitcoin and other secure cryptocurrencies.

Using the app is easy, with each person agreeing to the contract with a single Tinder-like swipe.

(Image: LegalFling)

Rick Schmitz, CEO of LegalThings and creator of LegalFling said: “Asking someone to sign a contract before having sex is a little uncomfortable. With LegalFling, a simple swipe to consent is enough to legally justify the fling.”

The app's creators say it was developed after the #metoo anti-harassment campaign caused governments, particularly Sweden, to look at making changes to rape laws to make consent more explicit before intercourse.

Within the app are toggle switches for things like BDSM or making a sex tape - as well as confirming that both parties are STD-free.

If both people agree to these extra conditions, the app automatically inserts penalty clauses into the resulting contract. These could then be used in court if, for example, one partner shares intimate pictures or video as a form of revenge porn.

“This probably does not apply to 99.9% of the users. But please bear in mind this can happen to anyone. And you are totally helpless when it happens. The (social) life of the subject person is never the same afterwards. This app provides a helping hand for these situations.”, said Schmitz.

(Image: LegalFling)

The app is designed to run on both iPhones and Android devices.

However, it hasn't yet been accepted onto the Apple App Store or the Google Play Store.

Is it legally binding?

According to the company behind it, LegalThingsOne, the app generates a contract which is a "legally binding agreement".

On the company's product page, it states:

"Just remember, the app is about setting clear rules and boundaries, not breaking them. To which extend the contract holds up in court, depends on your country of residence."

Additionally, the app says that consent can be withdrawn at any moment with a single click.

(Image: E+)

However, lawyers take a dim view of whether LegalFling would stand up in court.

“The law here is simple – no means no – regardless of an app or any other agreement made," said Rachel Adamson, a criminal lawyer at Slater and Gordon.

"Anyone has the right to change their mind and withdraw consent at any time and if the other person ignores that and carries on, they are guilty of a criminal offence," she told Mirror Tech.

"It is horrendous to think that this app could be relied on as a defence in cases of sexual assault, but there is absolutely no way it would stand up in court or that a jury would reach their verdict on that evidence alone.

"They would also have to assess how that consent had been obtained and whether it was from the correct person, which would be extremely difficult.”