Amazon Fire HD 10 Tablet with Alexa: $150

It is not an iPad, but it is a usable tablet for affordable price.
But it is not a "real" Android, so much less apps, not (yet) access to Play Store.
Even web browser is limited to only one.  It is mostly a "portal" device for Amazon content.

There are Android tables with Amazon comparable price,
but those comparable with iPad have similar price to iPad.

Amazon updates the Fire HD 10 tablet with a 1080p display and a much lower price - The Verge

Amazon.com: All-New Fire HD 10 Tablet with Alexa Hands-Free, 10.1" 1080p Full HD Display, 32 GB, Black - with Special Offers: Kindle Store
$150 with adds, $165 without adds

Alternatives:

Amazon.com: Lenovo Tab 10, 10-Inch Android Tablet, Qualcomm Snapdragon 210 Quad-Core 1.3 GHz Processor, 16 GB Storage, Slate Black, ZA1U0003US: Computers & Accessories
$99 (list $130), not HD

Amazon.com: Lenovo Tab 4, 10.1" Android Tablet, Quad-Core Processor, 1.4GHz, 16GB Storage, Slate Black, ZA2J0007US: Computers & Accessories
$180

Amazon.com : ASUS ZenPad 10.1", 2GB RAM, 16GB eMMC, 2MP Front / 5MP Rear Camera, Android 6.0, Tablet, Dark Gray (Z300M-A2-GR) : Computers & Accessories
$172

Amazon IoT Button technology

New Amazon Dash Button Teardown (JK29LP) | Matthew Petroff
"Amazon updated the Dash Button’s hardware... While the form factor and case remained much the same, the internals changed substantially. The major highlights are a switch from Broadcom to Atmel chips, a switch from an Energizer lithium battery to a Duracell alkaline battery, and the addition of Bluetooth Low Energy."

 

"Overall, the new Dash Button appears to be a revision designed to reduce production cost, centered around a reduction in energy usage, which allows for use of a considerably cheaper, alkaline battery."

Atmel - Wikipedia

AWS IoT Button – Cloud Programmable Dash Button