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79+ best October Prime Day deals under $100 to shop before they're gone

We compiled the best deals under $100 across skin care, tech, fitness and more to shop during Amazon’s Prime Big Deal Days.
We rounded up the best October Prime Day deals under $100 from brands like Casper, Anker, Beats and more.
We rounded up the best October Prime Day deals under $100 from brands like Casper, Anker, Beats and more.Kara Birnbaum / Vivian Le / NBC News
By Mili Godio

Amazon’s fall Prime Day — Prime Big Deal Days — is almost over, but the retailer is still offering plenty of discounts under $100. Prime Big Deal Days is a 48-hour sale exclusive to Prime members, and you can find deals on home and kitchen, fitness, tech items and more.

SKIP AHEAD Amazon Prime Day deals under $100 | Amazon Prime Day sales under $100 | Best sales at other retailers

To help you make the most of Prime Day Big Deal Days and identify what’s actually worth buying, we rounded up some of the best deals under $100 that we think are worth considering. We also compiled a list of Prime Day bestsellers so far, so you can see what other Select readers are shopping for.

Best Prime Day deals under $100

Below, we’re sharing the best Prime Day deals under $100. All of our recommendations are based on our previous coverage and reporting. We also included a handful of products we’ve tried ourselves, including Select Wellness Award, Pet Award and Bed & Bath Award winners. To ensure the quality of each deal, we’re running deals through price trackers like CamelCamelCamel — each product is either at its lowest price ever or its lowest price in at least three months.

Crest 3D Whitestrips

4.6-star average rating from 80,909 reviews on Amazon

The Crest 3D Whitestrips are one of our favorite at-home teeth-whitening products and includes 20 treatments that brighten your teeth over time and keep them white for at least 12 months, according to the brand. You can use the strips once a day for 30 minutes, and the kit also comes with two 1-hour express treatments you can use when you’ve got a bit more time, according to Crest.

Waterpik Aquarius Water Flosser

4.6-star average rating from 123,422 reviews on Amazon

This ADA-accepted water flosser comes with 10 pressure settings and a 22-ounce, dishwasher-safe water reservoir. You can use one of the seven included tips (you can buy additional replacements online) to clean different areas of your mouth and teeth, according to the brand. The water flosser also has a one-minute timer with a 30-second pacer to help you brush the expert-recommended two minutes. It’s available in four colors, including white, gray, blue and black.

Anker Nano Power Bank

4.3-star average rating from 750 reviews on Amazon

Lowest price ever

This compact portable charger has a built-in lightning connector to help you charge your Apple devices without a cable. The connector also folds away, so you can easily store it away in your bag without it getting tangled on other items, according to the brand.

LifeStraw Personal Water Filter

4.8-star average rating from 110,009 reviews on Amazon

This personal water filter can filter parasites, micro-plastics and impurities out of a water source as you sip through the top mouthpiece, making it a great accessory for camping and hiking. according to Lifestraw. You can purchase it in packs of two, three and five.

AncestryDNA Genetic Test Kit

4.7-star average rating from 81,353 reviews on Amazon

Trace your ancestral origins, discover distant relatives and more by using this at-home DNA test kit, according to the brand. You’ll need to send a saliva sample to the AncestryDNA lab using the included prepaid package and typically, you’ll get results back in six to eight weeks, according to the company. 

Differin Acne Treatment Gel

Lowest price ever

Differin Gel won the Select Best of Wellness award for the best overall acne treatment our staff tried. An expert-recommended treatment for acne-prone skin, it has 0.1% adapalene gel, which is a type of over-the-counter retinoid that can treat mild to moderate acne and blackheads. You can apply a thin layer of the gel to the affected areas after cleansing and before moisturizing, according to the brand.

Casper Original Pillow 2-Pack

4.4-star average rating from 10,477 reviews on Amazon

Lowest price ever

The Casper Original Pillow is a Select Best of Bed and Bath Awards winner due to its breathable percale weave and 100% cotton cover, which ensures that you stay cool throughout the night, according to the brand. Suited for any type of sleeper, the pillow has two machine-washable layers, including an inner core with shorter fibers and an outer layer with soft, clump-resisting fibers that Select staff described as “a pillow-in-a-pillow.” This set comes with two Casper pillows in your choice of a standard or king size.

Oral-B Pro 1000 Rechargeable Electric Toothbrush

4.6-star average rating from 130,112 reviews on Amazon

The Oral-B Pro 1000 is one of our favorite budget-friendly electric toothbrushes. It has an oscillating brush head that breaks up plaque, and a pressure sensor that lets you know if you’re brushing too hard, according to the brand. The brush also has a built-in 30-second timer, so you can keep track of whether you’re brushing for the expert-recommended 2 minutes.

Tile Mate 2-Pack

4.5-star average rating from 32,814 reviews on Amazon

Lowest price ever

The Tile Mate can help you keep track of important items, like your wallet, keys or luggage, using Bluetooth and the companion app. When it’s within the 250-foot Bluetooth range, you can ring your Tile to help you locate your missing items. If you’re outside that range, the app shows you the Tile’s most recent location. You can also double press the button on your Tile to make your phone ring, even when it’s on silent. The Tile Mate has a battery life of up to three years, and it works with Amazon Alexa, Google and Siri.

Blue Pure 511 Air Purifier

4.5-star average rating from 511 reviews on Amazon

Blueair makes some of our favorite air purifiers, and this compact option cleans the air in rooms up to 432 square feet in about 30 minutes, according to the brand. The air purifier can filter particles like dust, pollen, smoke, pet dander and more, according to Blueair. It also comes with a washable prefilter, which is a large fabric mesh cover that wraps around the body of the device and catches clumps of lint and hair.

Hydro Flask Wide Mouth Straw Lid

4.8-star average rating from 43,631 reviews on Amazon

This 40-ounce, dishwasher-safe Hydro Flask is one of our favorite water bottles. Its durable stainless steel shell can keep drinks cold for up to 24 hours and hot for up to 12 hours, according to the brand. The built-in carry loop also makes it comfortable to take on the go.

Loop Quiet Ear Plugs

4.2-star average rating from 66,824 reviews on Amazon

These Loop silicone earplugs are a favorite among our staff and a Select Best of Wellness Award winner because they can effectively reduce outside noise, even in loud street-facing apartments. They also come with eight different sized ear tips to provide a comfortable fit. The earplugs are also washable and reusable, according to the brand.

Meater Plus Smart Meat Thermometer

4.4-star average rating from 37,269 reviews on Amazon

This smart thermometer connects to a companion app via Bluetooth so you can monitor the temperature of meat, fish and more while you’re cooking. It keeps track of both the internal meat temperature (up to 212 degrees Fahrenheit) and the ambient/external temperature (up to 527 degrees Fahrenheit) at the same time, according to the brand. The app also sends you temperature notifications and estimated cook times.

Blissy Silk Pillowcase

4.5-star average rating from 1,198 reviews on Amazon

Lowest price ever

This Blissy silk pillowcase is a Select staff favorite because it’s designed to be breathable, cooling and gentle on the skin. The soft silk fabric is great for sensitive skin and helps reduce redness and irritation in the morning, according to the brand. It comes in standard, queen and king sizes and is available in more than 40 colors, including pink, silver and black.

Keurig K-Elite Coffee Maker

4.7-star average rating from 52,882 reviews on Amazon

Lowest price ever

Keurig makes some of our favorite single-serve coffee makers, and the brand’s K-Elite model can brew five different cup sizes, ranging from 4 to 12 ounces. It comes with a 75-ounce water reservoir, which allows you to brew up to 8 cups of coffee before needing to refill it, according to the brand. The coffee maker is compatible with the brand’s K-cups, and it can accommodate travel mugs up to 7.2 inches tall when you remove the drip tray, according to Keurig.

Petcube Cam

4.3-star average rating from 18,021 reviews on Amazon

You can check on your pet when you’re away from home using this mini camera. It’s compatible with Amazon Alexa and equipped with two-way audio, so you can see, talk to and hear your pet throughout the day. It has a wide 110-degree angle view, 8x zoom and night vision, according to the brand.

Levoit Core 300 Air Purifier

4.7-star average rating from 82,891 reviews on Amazon

One of our favorite affordable air purifiers, this Levoit option uses a pre-filter, carbon filter and HEPA filter to remove smoke, dust, mold and other contaminants from indoor air. It can clear the air in a 219-square-foot room in 12 minutes, according to the brand. The purifier comes with four sleep timer settings, so it can automatically shut off anywhere from two to eight hours.

Fujifilm Instax Square SQ6

4.8-star average rating from 2,382 reviews on Amazon

Fujifilm makes some of our favorite instant cameras, and this highly rated one produces square film photos. It has an automatic exposure feature that adjusts the shutter speed of your camera to take the best quality photos even in darker environments, according to the brand. The camera also includes a built-in selfie lens that lets you take pictures from the front.

Beats Studio Buds

4.4-star average rating from 76,717 reviews on Amazon

These earbuds offer two listening modes, including active noise cancellation and a transparency option to help you hear outside noises. You can listen for up to eight hours on a single charge, and they have on-ear controls to easily play music, answer calls and more. The earbuds are also sweat- and water-resistant, so you can safely use them while you’re working out, according to the brand.

Best Friends by Sheri The Original Calming Donut

4.6-star average rating from 69,730 reviews on Amazon

One of our favorite dog beds, this cozy circular bed is covered in vegan shag fur and has deep crevices so your pet can burrow, according to the brand. It’s available in five sizes, with the smallest size accommodating pets weighing up to 7 pounds and the largest size for pets up to 150 pounds, according to Best Friends by Sheri. It also comes in over a dozen colors, including oyster (white), dark chocolate (dark brown) and cotton candy (pink).

Catan Board Game

4.8-star average rating from 34,601 reviewers on Amazon

One of our favorite board games for adults, Catan is a strategy game in which players can build settlements, roads and cities. As your settlement expands, you earn victory points, and the first player to earn 10 victory points wins the game. The game allows for up to four players, but you can also purchase an extension pack to accommodate up to six people.

Nicetown Blackout Curtains Panels

4.7-star average rating from 110,056 reviews on Amazon

These drapes can block up to 99% of light and UV rays from the sun, according to the brand. An expert-recommended blackout curtain for the bedroom, they're available in 24 fade-resistant colors and they come with two panels per package to accommodate different types of windows and styles.

Anker Soundcore 2 Portable Bluetooth Speaker

4.6-star average rating from 112,055 reviews on Amazon

Lowest price ever

This Select staff-favorite bluetooth speaker offers up to 24 hours of playtime on a single charge. It’s water-resistant and extremely portable, weighing in at just under a pound. The speaker also has physical touch controls on top so you play or pause your music and adjust the volume.

HP Sprocket 3x4 Instant Photo Printer

4.4-star average rating from 222 reviews on Amazon

Lowest price ever

This portable printer lets you print photos using the bluetooth-enabled HP Sprocket app without needing ink or toner. Weighing less than a pound, the photo printer has a slim, lightweight design that’s also travel-friendly, according to the brand. The printer is only compatible with the HP Zink 3.5-inch by 4.25-inch sticky-backed paper.

Ring Video Doorbell with Indoor Camera

4.6-star average rating from 174,508 reviews on Amazon

Lowest price ever

This bundle includes Ring’s Video Doorbell and the latest iteration of its indoor camera, which allows you to monitor your space using your phone, tablet or computer and get real-time notifications. The Wi-Fi-equipped cameras pair with a companion app, so you can see, hear and speak to visitors. The devices are powered by a built-in rechargeable battery and work with Amazon Alexa voice assistant.

Google Nest Thermostat

4.2-star average rating from 12,721 reviews on Amazon

One of our favorite smart thermostats, the Google Nest thermostat has many energy-saving features, including both automated and manual temperature control through the Google home app. Google also will send you notifications, monthly energy usage reports and more.

Sony SRS-XB13 Portable Speaker

4.5-star average rating from 18,284 reviews on Amazon

Lowest price ever

This Sony portable Bluetooth speaker provides up to 16 hours of listening time on a single charge and comes with a built-in strap to help you take it on the go, according to the brand. It’s also water- and dust-resistant and it comes in five different colors, including coral pink and light blue.

Orolay Women’s Thickened Down Jacket

4.5-star average rating from 27,010 reviews on Amazon

This down jacket has duck-down and feathers filling and a polyester outer shell and lining to keep you cozy in the winter. The hood is lined with fleece to keep your head warm when it’s cold and windy out. The jacket also has multiple pockets on both the interior and exterior to hold your essentials.

Revlon One-Step Volumizer

4.6-star average rating from 336,450 reviews on Amazon

This expert-recommended hair dryer detangles, dries and provides volume to your hair using its tufted, nylon bristles, according to the brand. It comes with three heat settings (including a cool setting) and three speeds so you can give yourself the perfect at-home blowout.

Amazon Echo Dot (5th Gen)

4.7-star average rating from 63,816 reviews on Amazon

Lowest price ever

One of our favorite Echo speakers, the latest iteration of Amazon’s Echo Dot has an improved audio system, according to the brand. It can act as a Wi-Fi extender, and it has built-in temperature and motion sensors so you can control compatible smart home devices with your voice. The device can stream music, podcasts and audiobooks, and it’s compatible with Amazon Alexa, so you can set timers, get weather updates and more using voice commands.

BabylissPRO Nano Titanium Professional Curling Wand

4.5-star average rating from 461 reviews on Amazon

One of our favorite curling wands, this option has five heat settings, maxing out at 430 degrees Fahrenheit, according to the brand. It also has a titanium barrel, which heats up quickly and provides a smoother, long-lasting finish compared to other materials like ceramic, experts told us in our guide to flat irons.

Simplehuman Liquid Soap Pump Dispenser

4.4-star average rating from 20,916 reviews on Amazon

This Simplehuman pump has a built-in sensor so it automatically dispenses liquid soap when it detects your hand underneath the spout. It can also determine how much to dispense based on the positioning of your hand: place it close to the spout for a small amount of soap, or farther away for more, according to the brand. The battery life lasts for up to three months, according to the brand.

Peloton Guide AI-Powered Personal Strength Training Device

4.6-star average rating from 162 reviews on Amazon

Lowest price ever

This AI-powered device that attaches to your TV can help you create your own custom at-home workout experience, according to Peloton. The device uses motion tracking to count your reps, compare your form, set target goals, track how much weight you lift and more. You’ll need to purchase a Guide Membership separately to use this device, which costs $24 per month for up to five people and lets you access content via the Guide or the Peloton app.

Best Prime Day sales under $100

Here are the best Amazon Prime Day sales under $100 that we think you should know about. Keep in mind, not every item from a brand is discounted as described below.

  1. Up to 70% off AeroGarden indoor garden systems and kits
  2. Up to 69% off Echo smart speakers and smart home bundles
  3. Up to 60% off Blink smart home doorbells and cameras
  4. Up to 60% off popular fiction books
  5. Up to 61% off office products from Amazon Basics
  6. Up to 57% off Adidas apparel, footwear and accessories
  7. Up to 54% off Fire TV streaming devices
  8. Up to 52% off Keurig coffee brewers
  9. Up to 51% off Christmas trees, wreaths, garlands, ornaments, figurines and lights
  10. Up to 50% off Crest Whitestrips & Oral-B electric toothbrushes
  11. Up to 50% off Waterpik Oral Care
  12. Up to 50% off Levi’s men’s and women’s apparel
  13. Up to 50% off Amazon Fire tablets
  14. Up to 50% off Beats headphones and earbuds
  15. Up to 50% off Peloton Bike, Bike Plus, guide, accessories, and apparel
  16. Up to 49% off hair tools from Revlon and Bed Head
  17. Up to 49% off New Balance shoes and apparel
  18. Up to 48% off Shark floor care and air purifiers
  19. Up to 47% off home and kitchen products from Cricut, Rowenta and more
  20. Up to 46% off home decor from Americanflat, Creative Co-Op and more
  21. Up to 43% off Ninja cookware, outdoor oven and more
  22. Up to 43% off Le Creuset cookware and kitchen essentials
  23. Up to 42% off Sony headphones, earbuds and portable speakers
  24. Up to 42% off Petlibro smart pet feeders
  25. Up to 40% off premium skin care from Laneige, Innisfree and more
  26. Up to 38% off pickleball gear from Joola, Franklin, Onix and more
  27. Up to 38% off Chi hair care and styling tools
  28. Up to 37% off SodaStream machines and bottles
  29. Up to 32% off pet products from Amazon brands
  30. Up to 32% off National Geographic crystal and rock kits
  31. Up to 31% off Ninja air fryers, blenders, cookware and more
  32. Up to 30% off Dell monitors, laptops and more
  33. Up to 30% off beauty products from Moroccanoil, La Roche Posay and more
  34. Up to 30% off home cleaning and laundry from Lysol, Tide and more
  35. Up to 30% off hair care products from Moroccanoil, Drybar and more
  36. Up to 25% off Casetify phone cases and accessories
  37. Up to 25% off Braun electric razors, epilators and styler
  38. Up to 25% off Briogeo hair care
  39. Up to 20% off Breville kitchen appliances
  40. Up to 20% off Ruggable
  41. Up to 20% off Quip dental care
  42. Up to 20% off Otterbox phone cases and accessories

Prime Day: Best sales under $100 at other retailers

  1. Walmart: Up to 60% off electronics, kitchen appliances, outdoor items and more through Oct. 12
  2. Wayfair: Up to 60% off furniture, area rugs, decor and more during its 72-Hour Clearout sale
  3. Kohl’s: Up to 60% off bedding, 40% off electronics, 30% off select toys and more during its Deal Dash event through Oct. 11
  4. Macy’s: Up to 60% off clothing, shoes, bedding, kitchen essentials and more
  5. Casper: Up to 50% off sitewide, up to 25% off mattresses and 25% off bundles through Oct. 24
  6. Petco: Up to 50% off pet essentials
  7. Sephora: Up to 50% off select hair care
  8. Ulta: 50% off select hair care during its Gorgeous Hair Event through Oct. 21
  9. REI: Up to 50% off snowsports gear
  10. Buffy: Up to 40% off sheets, comforters, pillows and more
  11. Chewy: Up to 40% off pet essentials
  12. Kitsch: Up to 40% with code FALL20
  13. Solawave: Up to 40% off sitewide through Oct. 12
  14. Sur La Table: Up to 35% off Le Creuset items
  15. Brooklyn Bedding: Up to 30% off sitewide using code FLASH30 through Oct. 11
  16. Cozy Earth: Up to 30% off sitewide and 35% off bundles using code PRIMEDAYS through Oct. 11
  17. Benefit Cosmetics: Up to 30% off sitewide using code FRIENDS30
  18. Umamicart: Up to 25% off pantry items using code BIGMEAL through Oct. 13
  19. Love Your Melon: Up to 25% off sitewide through Oct.12
  20. Skinstore: Up to 25% off sitewide using code FRIENDS through Oct. 11
  21. Baublebar: Up to 20% off sitewide using code PRIMETIME through Oct. 11
  22. Selfmade: Up to 20% off sitewide
  23. Brooklinen: 15% off sitewide
  24. Solo Stove: Up to $150 off the Essential Bundle 2.0

Why trust Select?

Mili Godio is an updates editor for Select who has covered deals and sales for Prime Day, Black Friday, Cyber Monday or more since 2021. To round up the best Amazon Prime Day sales under $100, Godio found discounted products either at their lowest price ever or their lowest price in three months.

Catch up on Select’s in-depth coverage of personal finance, tech and tools, wellness and more, and follow us on Facebook, Instagram, Twitter and TikTok to stay up to date.

Mili Godio

Mili Godio is an updates editor for Select on NBC News.