The launch of the new chat app – which Google had hoped would focus on its use of artificial intelligence and the huge amounts of information it stores – has in fact revolved around the threat to privacy and safety that it represents. It culminated with a warning from Edward Snowden that nobody should use the app.

It was just the latest reminder that our messaging apps might not be as private as they seem. And that is very private indeed – unlike social networks and other semi-public spaces, messages are perhaps the most sacred and private spaces on the entire internet.

Gadget and tech news: In pictures Show all 25 1 /25 Gadget and tech news: In pictures Gadget and tech news: In pictures Gun-toting humanoid robot sent into space Russia has launched a humanoid robot into space on a rocket bound for the International Space Station (ISS). The robot Fedor will spend 10 days aboard the ISS practising skills such as using tools to fix issues onboard. Russia's deputy prime minister Dmitry Rogozin has previously shared videos of Fedor handling and shooting guns at a firing range with deadly accuracy. Dmitry Rogozin/Twitter Gadget and tech news: In pictures Google turns 21 Google celebrates its 21st birthday on September 27. The The search engine was founded in September 1998 by two PhD students, Larry Page and Sergey Brin, in their dormitories at California’s Stanford University. Page and Brin chose the name google as it recalled the mathematic term 'googol', meaning 10 raised to the power of 100 Google Gadget and tech news: In pictures Hexa drone lifts off Chief engineer of LIFT aircraft Balazs Kerulo demonstrates the company's "Hexa" personal drone craft in Lago Vista, Texas on June 3 2019 Reuters Gadget and tech news: In pictures Project Scarlett to succeed Xbox One Microsoft announced Project Scarlett, the successor to the Xbox One, at E3 2019. The company said that the new console will be 4 times as powerful as the Xbox One and is slated for a release date of Christmas 2020 Getty Gadget and tech news: In pictures First new iPod in four years Apple has announced the new iPod Touch, the first new iPod in four years. The device will have the option of adding more storage, up to 256GB Apple Gadget and tech news: In pictures Folding phone may flop Samsung will cancel orders of its Galaxy Fold phone at the end of May if the phone is not then ready for sale. The $2000 folding phone has been found to break easily with review copies being recalled after backlash PA Gadget and tech news: In pictures Charging mat non-starter Apple has cancelled its AirPower wireless charging mat, which was slated as a way to charge numerous apple products at once AFP/Getty Gadget and tech news: In pictures "Super league" India shoots down satellite India has claimed status as part of a "super league" of nations after shooting down a live satellite in a test of new missile technology EPA Gadget and tech news: In pictures 5G incoming 5G wireless internet is expected to launch in 2019, with the potential to reach speeds of 50mb/s Getty Gadget and tech news: In pictures Uber halts driverless testing after death Uber has halted testing of driverless vehicles after a woman was killed by one of their cars in Tempe, Arizona. March 19 2018 Getty Gadget and tech news: In pictures A humanoid robot gestures during a demo at a stall in the Indian Machine Tools Expo, IMTEX/Tooltech 2017 held in Bangalore Getty Gadget and tech news: In pictures A humanoid robot gestures during a demo at a stall in the Indian Machine Tools Expo, IMTEX/Tooltech 2017 held in Bangalore Getty Gadget and tech news: In pictures Engineers test a four-metre-tall humanoid manned robot dubbed Method-2 in a lab of the Hankook Mirae Technology in Gunpo, south of Seoul, South Korea Jung Yeon-Je/AFP/Getty Gadget and tech news: In pictures Engineers test a four-metre-tall humanoid manned robot dubbed Method-2 in a lab of the Hankook Mirae Technology in Gunpo, south of Seoul, South Korea Jung Yeon-Je/AFP/Getty Gadget and tech news: In pictures The giant human-like robot bears a striking resemblance to the military robots starring in the movie 'Avatar' and is claimed as a world first by its creators from a South Korean robotic company Jung Yeon-Je/AFP/Getty Gadget and tech news: In pictures Engineers test a four-metre-tall humanoid manned robot dubbed Method-2 in a lab of the Hankook Mirae Technology in Gunpo, south of Seoul, South Korea Jung Yeon-Je/AFP/Getty Gadget and tech news: In pictures Waseda University's saxophonist robot WAS-5, developed by professor Atsuo Takanishi Rex Gadget and tech news: In pictures Waseda University's saxophonist robot WAS-5, developed by professor Atsuo Takanishi and Kaptain Rock playing one string light saber guitar perform jam session Rex Gadget and tech news: In pictures A test line of a new energy suspension railway resembling the giant panda is seen in Chengdu, Sichuan Province, China Reuters Gadget and tech news: In pictures A test line of a new energy suspension railway, resembling a giant panda, is seen in Chengdu, Sichuan Province, China Reuters Gadget and tech news: In pictures A concept car by Trumpchi from GAC Group is shown at the International Automobile Exhibition in Guangzhou, China Rex Gadget and tech news: In pictures A Mirai fuel cell vehicle by Toyota is displayed at the International Automobile Exhibition in Guangzhou, China Reuters Gadget and tech news: In pictures A visitor tries a Nissan VR experience at the International Automobile Exhibition in Guangzhou, China Reuters Gadget and tech news: In pictures A man looks at an exhibit entitled 'Mimus' a giant industrial robot which has been reprogrammed to interact with humans during a photocall at the new Design Museum in South Kensington, London Getty Gadget and tech news: In pictures A new Israeli Da-Vinci unmanned aerial vehicle manufactured by Elbit Systems is displayed during the 4th International conference on Home Land Security and Cyber in the Israeli coastal city of Tel Aviv Getty

Allo was intended as a demonstration in part of the way that Google can use its access to all the world’s information to make life easier for people. It includes an assistant that can be asked things in natural language and will provide an answer, for instance, and a smart replies feature that can scan what people tend to say and help suggest things for them.

Google says that collecting the data makes that more useful – the better and more information it has, the better and more helpful the suggestions will be. But many people said that it makes it more worrying, too, since by collecting that information it appeared to be putting people at risk of government spying and other worries.

And the complaints were further compounded by the fact that Google appeared to have walked back its initial commitments to privacy. It had first suggested that it would only store some information, and get rid of it after a short time – but now it seems that all the data is readable by Google, and will be forever unless a user deletes it, which Google gives them the option to do.

There is a way to turn off Google’s data collection in Allo. But that means starting a specific kind of conversation – an “Incognito” one – in which it also doesn’t use any of its special features and becomes like any other chat app.

“We've given users transparency and control over their data in Google Allo," said a Google spokesperson. "And our approach is simple -- your chat history is saved for you until you choose to delete it. You can delete single messages or entire conversations in Allo.

"We also provide the option to chat in Incognito mode, where messages are end-to-end encrypted and you can set a timer to automatically delete messages for your device and the person you’re chatting with's device at a set time.”

Google isn’t the first company to run into trouble with chats recently. WhatsApp announced last month that it would start sharing data with Facebook – not chats, which are encrypted and unreadable, but details about who people speak to and have in their contacts.

A controversy erupted, perhaps one of the biggest privacy stories in recent years. And it seemed to be a result of the personal nature of what was at stake, since messages to our friends seem like one of the most sacred things we do with our phone.

That was something that has led many companies to adopt a commitment to end-to-end encryption. That feature – present in WhatsApp and iMessage – means that messages are scrambled so that they can only ever be opened by the phone that they’re being sent to, and so can’t be intercepted even if the companies wanted to.

Such decisions have got companies including Apple and WhatsApp itself into trouble in the past. Apple has been pursued by the FBI over access to a phone, and WhatsApp officials have been detained in Brazil and the app has been shut down for not being able to hand over information.

It might be such problems that Google was looking to avoid with its change. Since the information isn’t encrypted when stored, it makes it far easier to comply with government requests, and the information will be available to anyone with a valid warrant.