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Ninja Speedi 12-in-1 Multi-Cooker, Air Fryer & Slow Cooker ON500UKSTGD review

No. 8 of 10 in our multi cookers ranking · Updated · How we rank

Our verdict: The Ninja Speedi 12-in-1 Multi-Cooker, Air Fryer & Slow Cooker ON500UKSTGD ranks 8th of the 10 multi cookers we compare, with 8.4 out of 10.

Ninja Speedi 12-in-1 Multi-Cooker, Air Fryer & Slow Cooker ON500UKSTGD

8.4/10

The Ninja Speedi ON500UKSTGD is a 5.7L countertop cooker that steams, air fries, bakes and slow cooks without a pressure lid. It suits households of up to four who want one-pan meals and have the worktop space.

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Why it's here

  • Speedi Meals mode cooks protein and veg together in one pot
  • Steam Air Fry and Steam Bake give moist insides and crisp outsides
  • 5.7L non-stick ceramic pot with a Cook & Crisp tray
  • No pressure lid to seal or vent

Keep in mind

  • Not a true pressure cooker, so stews and beans take longer
  • Around 7.4kg with a roughly 39cm square footprint
  • The 15-minute meal claim excludes preheating

Why the Ninja ON500UKSTGD scores 8.4

Each bar shows where it places among the 10 multi cookers in this guide, so a full bar is 1st of 10. How happy owners are counts for most of the score.

  • How happy owners are8th of 10
  • How many rated it9th of 10
  • How new it is1st of 10

Why it sits behind the Russell Hobbs SatisFry Air & Grill Multicooker 26520

The Russell Hobbs SatisFry Air & Grill Multicooker 26520 (8.5) beats the Ninja Speedi 12-in-1 Multi-Cooker, Air Fryer & Slow Cooker ON500UKSTGD (8.4) because it leaves owners a little happier. The Ninja Speedi 12-in-1 Multi-Cooker, Air Fryer & Slow Cooker ON500UKSTGD is the newer design, but not by enough to close the gap.

About the Ninja ON500UKSTGD

The Speedi has two modes, chosen with a SmartSwitch. Rapid Cooker mode uses steam with air circulation and holds Speedi Meals, Steam Air Fry, Steam Bake, and Steam & Prove. Air Fry/Hob mode holds Air Fry, Grill, Bake/Roast, Dehydrate, Sear/Sauté, and Slow Cook & Reheat. That makes 12 functions in total.

Speedi Meals cooks a protein and vegetables or grains together in the one pot. Steam Air Fry and Steam Bake add steam to the cooking, so food stays moist inside with a crisp outside. There is no pressure lid to seal or vent, so it is not a pressure cooker. It runs at 1760W.

The pot holds 5.7L and is non-stick. John Lewis lists room for a chicken up to 1.6kg or a roast up to 2kg. In the box are the pot, a Cook & Crisp tray and a recipe guide. The pot is dishwasher safe. The unit weighs 7.4kg and measures about 31.6cm high, 35.7cm wide and 35.3cm deep.

What owners report about the Ninja ON500UKSTGD

We found little written owner feedback for this exact model that we could open, so we do not report a pattern of praise or complaints here.

What we can say comes from the specs: it is a heavy, fairly bulky appliance, so owners need a permanent spot on the worktop. It will also take longer over stews and beans than a pressure cooker.

Who the Ninja ON500UKSTGD suits

It suits a household of up to four that wants quick one-pan meals, plus an air fryer and slow cooker in one machine. If you cook protein and veg together most nights, Speedi Meals is the main reason to buy it.

Look elsewhere if you want true pressure cooking for stews, beans and tough cuts. The Ninja Foodi 11-in-1 SmartLid Multi-Cooker 6L OL550UK or the Midea 9-in-1 Pressure Cooker 7.6L are the better fit. For big-batch slow cooking, the Ninja Foodi 8-in-1 PossibleCooker 8L MC1001UK has more room. Anyone short of storage space may find 7.4kg awkward to lift in and out of a cupboard.

Questions about the Ninja ON500UKSTGD

Is the Ninja Speedi 12-in-1 ON500UKSTGD a pressure cooker?

No. It cooks with steam and air circulation and has no pressure lid, so stews and beans take longer than in a pressure cooker.

Does the Ninja Speedi 12-in-1 ON500UKSTGD cook rice?

The retailer spec pages we read list no dedicated rice setting. Speedi Meals cooks a protein with grains or veg together in the one pot.

How big is the Ninja Speedi 12-in-1 ON500UKSTGD?

It measures about 31.6cm high, 35.7cm wide and 35.3cm deep, and weighs 7.4kg. The pot holds 5.7L.

What is the warranty on the Ninja Speedi 12-in-1 ON500UKSTGD?

Marks Electrical lists 2 years parts and labour if you register within 28 days of purchase. Check the brand's wording at registration.

Is the Ninja Speedi 12-in-1 ON500UKSTGD pot dishwasher safe?

Yes. Retailer listings describe the 5.7L non-stick cooking pot as dishwasher safe.

Other multi cooker picks

The other badge winners in our multi cookers ranking.

All 10 multi cookers, compared

  1. 1 Ninja Foodi 8-in-1 PossibleCooker 8L MC1001UKBest Choice 9.2 Check Price
  2. 2 Morphy Richards Multifunction 10-in-1 Food Multicooker 6.5L 560007Value for Money 9.0 Check Price
  3. 3 Ninja Foodi 11-in-1 SmartLid Multi-Cooker 6L OL550UKBest Premium 9.0 Check Price
  4. 4 Drew&Cole CleverChef 14-in-1 Multi Cooker 5LBest Budget 8.6 Check Price
  5. 5 Midea 9-in-1 Pressure Cooker 7.6L 8.6 Check Price
  6. 6 Russell Hobbs Good to Go 6.5L Multicooker 28270 8.6 Check Price
  7. 7 Russell Hobbs SatisFry Air & Grill Multicooker 26520 8.5 Check Price
  8. 8 Ninja Speedi 12-in-1 Multi-Cooker, Air Fryer & Slow Cooker ON500UKSTGDThis review 8.4 Check Price
  9. 9 Instant Pot 3.8L Smart 7-in-1 Electric Multi-Cooker 8.3 Check Price
  10. 10 Instant Pot Superior 7.1L Slow Cooker Multi-Function Cooking System 8.2 Check Price
See the full multi cookers ranking

The Ninja ON500UKSTGD on Amazon

Ninja Speedi 12-in-1 Multi-Cooker, Air Fryer & Slow Cooker ON500UKSTGD

The Ninja Speedi ON500UKSTGD is a 5.7L countertop cooker that steams, air fries, bakes and slow cooks without a pressure lid. 8.4 out of 10.

Check Price on Amazon

How we score it

Every score here comes from our ranking model; no editor sets the order. Too few review sites cover multi cookers for their verdicts to lead, so this ranking is led by owners. It ranks products by how happy owners are, holding back any product few owners have rated until more agree. How many rated it and how new it is only settle close calls, and value for money earns its own badge rather than a higher place. We compared 23 models for this guide before settling on these ten.

Brands can't pay to be included or to move up. We last checked these picks in October 2026.

How we rank, in full

Where these facts come from