# Ninja Double Stack

- Source: https://stierproducts.com/products/ninja-doublestack-xl-sl401
- Category board: https://stierproducts.com/categories/air-fryers
- Placement: #11 of 15 in Air Fryers, D tier
- Brand: Ninja
- LP on this board: 293
- Last researched: 2026-08-20T00:41:48.433Z
- Method: https://stierproducts.com/methodology
- Dataset: https://doi.org/10.5281/zenodo.22062813 - every board at once, one dated snapshot per release, same licence, prices and photographs left out
- Reuse: Text, rankings, tier assignments, LP values and verdicts are free to quote and reuse with attribution to stierproducts and a link to the source URL (CC BY 4.0: https://creativecommons.org/licenses/by/4.0/). Product photographs are not covered: they belong to their respective owners and are reproduced to illustrate the product being reviewed. Do not redistribute them under this licence.

## Verdict

A compromised design from a good brand. Uneven lower-basket cooking with no reliability upside. Buy the DZ401 instead.

## For

- Vertical stacked-basket design saves counter width on paper

## Against

- Lower basket cooks noticeably less evenly
- Capacities are awkward
- The taller mechanism adds moving parts the horizontal DualZone line does not need
- Solves a space problem by creating a cooking problem

## Flagged as one to avoid

This product entered 1 of 6 runs as one buyers cross-shop but should not buy, rather than as a pick. It is published here rather than dropped.

## Evidence

Consolidated from 33 cited sources across 27 outlets

| Outlet | Said by | Stance | Link | Link status |
| --- | --- | --- | --- | --- |
| Sprint Kitchen | Sprint Kitchen | C | https://www.youtube.com/watch?v=105egyCmL4g | fetched and confirmed |
| Facebook | Scotty Smith | B | https://www.facebook.com/groups/1158249198809761/posts/1662521105049232/ | fetched and confirmed |
| Level1Techs Forums | MattiP | B | https://forum.level1techs.com/t/ninja-double-stack-air-fryer/243305 | fetched and confirmed |
| Facebook | Anonymous participant | B | https://www.facebook.com/groups/237888946773638/posts/1993549154540933/ | fetched and confirmed |
| How2&Review | How2&Review | B | https://www.youtube.com/watch?v=YajV4se4Iho | fetched and confirmed |
| Trusted Reviews | Gian Estrada | B | https://www.trustedreviews.com/deals/ninjas-double-stack-air-fryer-just-got-a-tasty-26-price-cut | fetched and confirmed |
| CNET | Aashna Gheewalla | B | https://www.cnet.com/deals/prime-day-ninja-double-stack-xl-air-fryer-deal-26-06-17/ | fetched and confirmed |
| Wunschgetreu - Reviews Made in Germany | Wunschgetreu - Reviews Made in Germany | - | https://www.youtube.com/watch?v=0eOi2w67UhU&vl=en | fetched and confirmed |
| Wunschgetreu - Reviews Made in Germany | Wunschgetreu - Reviews Made in Germany | - | https://www.youtube.com/watch?v=0eOi2w67UhU | fetched and confirmed |
| Ultracooker EN | Ultracooker EN | C | https://www.youtube.com/watch?v=dXwhMzzKzsY | fetched and confirmed |
| Family Pop TV | Family Pop TV | B | https://www.youtube.com/watch?v=HARWwTvZGOs | fetched and confirmed |
| Kip Hakes | Kip Hakes | D | https://www.youtube.com/watch?v=lrKo5Nit_8g | fetched and confirmed |
| At Home with Lucas | At Home with Lucas | C | https://www.youtube.com/watch?v=JmmeckOuuG8 | fetched and confirmed |
| Dazza | Dazza | D | https://www.youtube.com/watch?v=fx10KTxdh3U | fetched and confirmed |
| How2&Review | How2&Review | B | https://www.youtube.com/watch?v=QlemSXHCOlY | fetched and confirmed |
| Mimi | Mimi | B | https://www.youtube.com/watch?v=FOCxjregJUc | fetched and confirmed |
| American Kitchen Must Haves | American Kitchen Must Haves | B | https://www.youtube.com/watch?v=K65H1VsKIl8 | fetched and confirmed |
| Homely Bites | Homely Bites | C | https://www.youtube.com/watch?v=ItNBvUNtuIM | fetched and confirmed |
| Bibou’s Guide | Bibou’s Guide | B | https://www.youtube.com/watch?v=23HCcs6ylbY | fetched and confirmed |
| Alisha Approved \| Enginner & Tech UGC Creator | Alisha Approved \| Enginner & Tech UGC Creator | B | https://www.youtube.com/watch?v=fSyQQbEU5cs | fetched and confirmed |
| Reviews4U | Reviews4U | C | https://www.youtube.com/watch?v=ZvDP50XIvss | fetched and confirmed |
| angelic | angelic | B | https://www.youtube.com/watch?v=8Rqx-gKFiCw | fetched and confirmed |
| tech savy | tech savy | B | https://www.youtube.com/watch?v=hAUOBVU93eg | fetched and confirmed |
| Reviews4U | Reviews4U | C | https://www.youtube.com/watch?v=6w6ieuoV-kk | fetched and confirmed |
| Ideal Home | idealhome.co.uk | C | https://www.idealhome.co.uk/kitchen/best-dual-zone-air-fryers | fetched and confirmed |
| Elesen | Elesen | B | https://www.elesen.lt/en/kitchen/cooking/fryers/sl400eu/ninja-double-stack-xl-9-5l-2470-w-grey-air-fryer | fetched and confirmed |
| techknowledge | techknowledge | B | https://www.youtube.com/watch?v=Ta0S6ANISsA | fetched and confirmed |
| Instagram | - | B | https://www.instagram.com/reel/Da7sNXmzhV0/ | fetched and confirmed |
| Instagram | - | B | https://www.instagram.com/reel/DPlol7aCD0C/ | fetched and confirmed |
| Mumsnet | Lucy Cotterill | S | https://www.mumsnet.com/swearsby/best-air-fryers | fetched and confirmed |
| TechGearLab | Mallory Paige | B | https://www.techgearlab.com/reviews/kitchen/toaster-oven/ninja-double-stack-xl-dct651 | fetched and confirmed |
| Meem Reviews | Meem Reviews | - | https://www.youtube.com/watch?v=yqVe9pMpmW8 | fetched and confirmed |
| Meem Reviews | Meem Reviews | - | https://www.youtube.com/watch?v=2f3jWmxJi_s | fetched and confirmed |

## Nearest alternatives on this board

| Rank | Product | Tier | Page |
| --- | --- | --- | --- |
| 1 | Cosori TurboBlaze | S | https://stierproducts.com/products/cosori-turboblaze-6-0-quart-air-fryer |
| 6 | Breville Smart Oven Air Fryer Pro | B | https://stierproducts.com/products/breville-smart-oven-air-fryer-pro |
| 7 | Typhur Dome 2 | C | https://stierproducts.com/products/typhur-dome-2 |
| 8 | Ninja Crispi | C | https://stierproducts.com/products/ninja-crispi-4-in-1-portable-glass-air-fryer |
| 9 | Philips 3000 Series Dual Basket | C | https://stierproducts.com/products/philips-3000-series-dual-basket-airfryer |
| 10 | Instant Vortex Mini | C | https://stierproducts.com/products/instant-vortex-mini |
| 12 | Chefman TurboFry Touch 8-Quart | D | https://stierproducts.com/products/chefman-turbofry-touch-8-quart |
| 13 | Dreo ChefMaker Combi Fryer | F | https://stierproducts.com/products/dreo-chefmaker-combi-fryer |
| 14 | Dash Tasti-Crisp DCAF260 | F | https://stierproducts.com/products/dash-tasti-crisp-dcaf260 |
| 15 | Russell Hobbs SatisFry Dual Basket | F | https://stierproducts.com/products/russell-hobbs-satisfry-dual-basket |

The full board is at https://stierproducts.com/categories/air-fryers.

## What this tier means

- D: Weak. Hard to recommend when better options cost similar money.

## How to read this

- Each category is researched in four independent runs, one per lens (expert consensus, value, reliability, community pulse). Every run ranks a board of candidates that deliberately includes products buyers cross-shop but should avoid. Placements score on a ranked ladder (LP), and tiers are derived from LP, so no tier is ever assigned by hand.
- LP is this product's points on its own category ladder. It is comparable within a category and not across categories.
- Link status reports what our pre-publication link check found when it fetched the cited URL. It says nothing about the quality of the review.
- A citation with no usable link is listed rather than dropped, and is excluded from the counted total above.

## Image

https://stspimgdevmfyk46r5vwkay.blob.core.windows.net/images/products/ninja-doublestack-xl-sl401.webp

Product photographs are not covered: they belong to their respective owners and are reproduced to illustrate the product being reviewed. Do not redistribute them under this licence.