10 things in tech you need to know today

Good morning! This is the tech news you need to know this Thursday.

1. Apple CEO Tim Cook explained why Deirdre O'Brien is the right person to take over from Angela Ahrendts in leading the firm's retail stores. In an internal email obtained by Business Insider, Cook said: "Deirdre was part of the team that planned and launched Apple's very first online and retail stores."
2. Facebook insiders are cautiously optimistic about changes to employee bonuses. Sources said it has the potential to produce good results - but will be hard to measure and could have dangerous unintended consequences.
3. Apple is once again the most valuable company in the world, worth $821 billion. Apple surpassed Microsoft as the world's most valuable publicly traded company at the close of trading on Wednesday after a hot streak stemming from better-than-expected earnings last week.
4. Japanese mega-investor SoftBank has used up half of its $100 billion Vision Fund - and it could run out of cash by 2020. The $97 billion fund has invested $45.5 billion to date.
5. Facebook Messenger now lets you delete messages for 10 minutes after they've already been sent. Facebook said back in April it would roll the feature out to the general public after CEO Mark Zuckerberg was caught quietly deleting old messages.
6. Certain iPhone apps are reportedly tracking their users' swipes and taps without informing them. According to TechCrunch, customer analytics firm Glassbox allows its customers to record user activity without disclosing that they are doing so.
7. Jeff Bezos "enraged" the National Enquirer by tweeting about his divorce before the Lauren Sanchez exposé was published. In a lengthy report, The Washington Post reveals how Bezos tried to wrestle control of the narrative, enraging the Enquirer's chief content officer.
8. Calm, the 7-year-old meditation app, says it's now valued at $1 billion. Calm said it has 40 million downloads worldwide, with one new user joining every second. The app also has over one million paid subscribers.
9. Lime confirms it's raising another $300 million round that raises its valuation to a whopping $2.4 billion. Scooter companies have seen skyrocketing growth in the past year as venture capital money pours into the space.
10. Electric scooters were to blame for at least 1,500 injuries and deaths in the US last year. Collating injury data has been tricky, but a new investigation from Consumer Reports shows a bare minimum of 1,545 accidents over the past year.

Have an Amazon Alexa device? Now you can hear 10 Things in Tech each morning. Just search for "Business Insider" in your Alexa's flash briefing settings.