Amazon Prime Day 2021 bestsellers: The top products of Day 2

The most purchased products we covered today span categories, from an air purifier and a smart plug to an exercise bike and a laptop.

June 22, 2021, 8:31 PM EDT

Lauren Levy

Contributing Writer

Illustrations of a Google Nest, Smart Plug, Home Bicycle and a Air purifier, all on sale on Amazon Prime Day. Shop the top deals from Amazon Prime Day 2021 Day 2. See the bestsellers and favorite products of Shopping readers, including robot vacuums, air

Smart plugs, air purifiers, robot vacuums, thermostats and more make up the most purchased and bestselling products we covered.Amazon

2. Medify MA-15 Air Purifier

Lowest price ever, according to CamelCamelCamel
4.7-star average rating from 1,949 reviews on Amazon
The best Amazon Prime day deals under $100 in 2021

Medify MA-15 Air Purifier

Medify MA-15 Air Purifier

3. DASH mandoline slicer

Lowest price since March, according to CamelCamelCamel
4.5-star average rating from 9,879 ratings on Amazon
24 bestselling products from Day 1 of Amazon Prime Day 2021

DASH mandoline slicer

DASH mandoline slicer

4. Waterpik WP-660 Water Flosser

Lowest price since November 2019, according to CamelCamelCamel
4.7-star average rating from 72,138 reviews on Amazon
Amazon Prime Day 2021: Top deals on beauty and wellness

Waterpik WP-660 Water Flosser

Waterpik WP-660 Water Flosser

5. Cyclace Exercise Bike

Lowest price since November 2020, according to CamelCamelCamel
4.4-star average rating from 5,218 reviews on Amazon
15 best Amazon Prime Day fitness deals in 2021

Cyclace Exercise Bike

Cyclace Exercise Bike

6. Shark AV1010AE IQ Robot Vacuum

Lowest price ever, according to CamelCamelCamel
4.5-star average rating from 569 reviews on Amazon
13 best Prime Day 2021 deals on Shopping staff favorite products

Shark AV1010AE IQ Robot Vacuum

Shark AV1010AE IQ Robot Vacuum

7. NordicTrack T Series Treadmill

Lowest price since January 2019, according to CamelCamelCamel
4.5-star average rating from 18,808 reviews on Amazon
14 best Amazon Prime Day fitness deals in 2021

NordicTrack T Series Treadmill

NordicTrack T Series Treadmill

8. COSORI Smart Wi-Fi Air Fryer

Lowest price since July 2020, according to CamelCamelCamel
4.7-star average rating from 16,218 reviews on Amazon
Amazon Prime Day air fryer deals 2021: Best air fryers to shop

COSORI Smart Wi-Fi Air Fryer

COSORI Smart Wi-Fi Air Fryer

9. Instant Vortex Plus 4-Quart 6-in-1 Air Fryer

Lowest price since February, according to Honey
4.6-star average from 40,466 reviews on Amazon
Amazon Prime Day air fryer deals 2021: Best air fryers to shop

Instant Vortex Plus 4-Quart 6-in-1 Air Fryer

Instant Vortex Plus 4-Quart 6-in-1 Air Fryer

10. Acer Chromebook Spin 311 Convertible Laptop

Lowest price ever, according to CamelCamelCamel
4.6-star average rating from 6,674 reviews on Amazon
The best Amazon Prime Day tech deals of 2021

Acer Chromebook Spin 311 Convertible Laptop

Acer Chromebook Spin 311 Convertible Laptop

11. Dash Tasti Crisp Electric Air Fryer

Lowest price ever, according to CamelCamelCamel
4.6-star average from 16,834 reviews on Amazon
Amazon Prime Day air fryer deals 2021: Best air fryers to shop

Dash Tasti Crisp Electric Air Fryer

Dash Tasti Crisp Electric Air Fryer

12. NVK Dog Training Collar

Lowest price since January, according to CamelCamelCamel
4.8-star average rating from 16,246 reviews on Amazon
Amazon Prime Day pet deals 2021: The best pet deals of Day 2

NVK Dog Training Collar

NVK Dog Training Collar

13. Google Nest Thermostat

Lowest price ever, according to CamelCamelCamel
4.3-star average rating from 5,609 reviews on Amazon
The best Amazon Prime day deals under $100 in 2021

Google Nest Thermostat

Google Nest Thermostat

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Lauren Levy is a contributing writer for NBC Select.