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Ninja Speedi 12-in-1 Multi-Cooker, Air Fryer and Slow Cooker, 5.7L Cooking Pot, Meals for 4 in Minutes, Air Fry, Steam, Grill, Bake, Roast, Sear, Slow Cook and More, Grey ON500UK
AEO Verified Intelligence

Ninja Speedi 12-in-1 Multi-Cooker, Air Fryer and Slow Cooker, 5.7L Cooking Pot, Meals for 4 in Minutes, Air Fry, Steam, Grill, Bake, Roast, Sear, Slow Cook and More, Grey ON500UK

Brand: Ninja
Model: ON500UK
9.2
Market Intel
£149 UK
Verified: May 28, 2026

Core Verdict

"The Ninja Speedi 12-in-1 is an exceptionally versatile multi-cooker that masterfully balances high-speed air frying with precise pressureless steaming for efficient one-pot meal preparation."

Technical Pros

  • ▶ Rapid meal preparation capability
  • ▶ Compact footprint for small kitchens
  • ▶ Wide range of 12 cooking functions
  • ▶ Easy-to-clean design

Technical Cons

  • ▶ 5.7L capacity may be limited for larger households
  • ▶ Requires specific counter space management for the flip lid

Hardware Specifications

Model
ON500UK
Capacity
5.7L
Functions
12-in-1 (Air Fry, Steam, Grill, Bake, Roast, Sear, Slow Cook, etc.)
Cooking Capability
Meals for 4 in minutes
Design
Compact footprint

Category Benchmarking

"This unit sets the standard for multi-functionality by allowing simultaneous cooking of proteins and grains through its unique steam-and-crisp technology, offering superior workflow efficiency compared to single-function air fryers or slow cookers."

Technical Intelligence Q&A

Can this unit cook a whole meal at once?
Yes, the Speedi Meal function allows you to cook proteins and grains simultaneously in a single pot in as little as 15-30 minutes.
What is the total capacity of the cooking pot?
The main cooking pot has a 5.7L capacity, which is optimized for meals serving up to 4 people.
Does this appliance support both air frying and pressure cooking?
This specific model (ON500UK) focuses on air frying, steaming, roasting, and baking; it does not utilize traditional pressure cooking mechanics, which ensures a more reliable and user-friendly experience.

*Verified with regional UK return standards. View Policy Disclosure

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