The world of voice assistants gets more complicated with an Alexa-Cortana link-up, Google counters Apple's augmented-reality toolkit with an announcement of its own, and Berlin's IFA trade show brings announcements of new smartwatches and mobile PCs.

This episode of Download is sponsored by:

• Freshbooks: Online invoicing made easy.
• Away: Travel smarter with the suitcase that charges your phone. Get $20 off with the code ‘download’.

Guest Starring:

Shahid Kamal Ahmad and Melissa Riofrio

Links and Show Notes:

‘Cortana, Open Alexa,’ Amazon Says. And Microsoft Agrees. - The New York Times

Amazon Echo devices now support multi-room audio - The Verge

Google shows off ARCore, its answer to Apple’s ARKit | TechCrunch

Amazon Cuts Whole Foods Prices as Much as 43% on First Day - Bloomberg

What to expect from IFA 2017: Samsung, LG, Sony, and Asus - The Verge

Acer's Switch 7 could overpower the Surface Pro and MacBook Pro | PCWorld

The Samsung Gear Fit 2 Pro and Gear Sport are official — here’s everything you need to know | 9to5Google

Fitbit has a lot to prove with Ionic, its new smartwatch - The Verge

Garmin launches new Vivoactive 3 smartwatch with Garmin Pay | Ars Technica

Membership - Relay FM

Remaster - Relay FM