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With 4.8 stars from 6,336 Amazon reviews, the Ninja AF100UK holds the highest star rating of any single-basket air fryer in this guide — and the model that introduced the Ninja air fryer range to UK kitchens at an accessible price. This 3.8-litre 4-in-1 air fryer covers Air Fry, Roast, Reheat and Dehydrate through a clean digital interface, cooks up to 50% faster than a fan oven by Ninja’s tested claim, and fits comfortably on a worktop at just 27.9 cm wide. We tested the AF100UK fully across chips, chicken, dehydrated fruit and reheated leftovers to help you decide whether its exceptional rating reflects real-world cooking performance — and how it compares to the broader range of air fryers in 2026.
Who Is the Ninja AF100UK For?
The AF100UK is the Ninja air fryer for households who want Ninja’s build quality and digital precision at an accessible entry price. It suits:
- Households of 2–4 who need a compact everyday air fryer — the 3.8L basket feeds 2–4 people comfortably and fits a 1.35kg chicken or 900g of fries
- First-time Ninja buyers who want to enter the Ninja range at the best-value point — the AF100UK delivers the same Ninja build quality and digital cooking performance as pricier models at a lower cost
- Buyers who want a Dehydrate function in a compact single-zone fryer — the AF100UK is one of the few sub-£100 single-basket fryers with built-in dehydrate capability
- Anyone upgrading from a manual analogue fryer — the digital display, auto-pause safety and precise temperature control offer a meaningful step up from dial-based models
- Small kitchen households — at 27.9 cm wide, the AF100UK is one of the most compact family-size air fryers in this guide
If you need more than 3.8 litres of capacity, the Ninja range extends upward to the AF400UK dual zone. If Dehydrate is not required and the lowest possible price is the priority, the Tower T17021 (4.3L, manual dials) offers more capacity at a lower price point. The AF100UK’s strength is Ninja precision in a compact, capable package that handles four cooking modes including Dehydrate.
Ninja AF100UK Specifications
- Capacity: 3.8 litres
- Wattage: 1,550W
- Cooking functions: Air Fry, Roast, Reheat, Dehydrate
- Temperature range: 80–200°C
- Timer: Up to 60 minutes
- Controls: Digital display with touch controls
- Auto-pause: Yes — cooking pauses automatically when basket is removed
- Dimensions: 27.9 × 33.8 × 34.5 cm (W × D × H)
- Weight: 4.4 kg
- Colour: Grey and Black
- Energy saving: Up to 55% vs conventional ovens (tested on sausages)
- Guarantee: 2 years on registration (UK and ROI)
At 27.9 cm wide, the AF100UK is considerably more compact than many competitors at the 3.8–4.3L capacity bracket. The Tower T17021 (4.3L) measures 36.5 cm wide — 8.6 cm wider than the Ninja despite holding only 0.5 litres more food. For kitchens where worktop space is limited, the AF100UK’s footprint is a genuine practical advantage. Running the AF100UK for 20 minutes at the UK average electricity rate of 28p per kWh costs approximately 12–14p — consistent with the 55% energy saving claim versus a conventional electric oven for the same cooking task.
The Auto-Pause Safety Function
One of the most practically useful features on the AF100UK is the auto-pause system — rarely headlined in marketing but frequently cited by owners as a reason for their five-star ratings. When the basket is pulled out mid-cook to shake chips, flip chicken or check progress, the heating element and fan pause immediately. Cooking resumes the moment the basket is re-inserted, continuing from the remaining time on the timer. This eliminates the safety concern of a live heating element running with the basket removed and prevents overcooking when checking food mid-session.
The practical impact on everyday cooking is significant: shaking chips halfway through becomes a natural, risk-free habit rather than a careful action requiring the fryer to be switched off. For households new to air frying, the auto-pause removes the single most common source of uncertainty and makes the process more intuitive from day one. This feature is absent on the Tower T17021 and many other analogue fryers in this price bracket — it is one of the details that contributes to the AF100UK’s 4.8-star rating.
Build Quality and Design
The AF100UK’s Grey and Black colour scheme is Ninja’s signature aesthetic and feels premium relative to the price bracket. The matte surfaces resist fingerprints well and the overall build has a solidity that distinguishes Ninja products from cheaper competitors — no flex in the housing, no rattle in the basket, and controls that respond precisely. At 4.4 kg it is a well-balanced countertop weight that does not move during operation.
The digital display is clean and legible — cooking function, temperature and timer are all visible simultaneously on the front panel. The touch controls are responsive and clearly labelled. Selecting a function, adjusting temperature and time with the arrow buttons and pressing start takes approximately 10 seconds from cold — faster than many digital fryers with more complex menu navigation. The basket handle is proportioned for a secure grip with an oven glove and the basket releases and re-seats cleanly with each use.
Cooking Performance: Our Test Results
Chips and Fries
Fresh-cut chips (400g at 200°C for 18 minutes, shaken at 10 minutes) came out golden and genuinely crispy using a single teaspoon of oil — a result on a par with the Tower T17021 at the same settings. Frozen chips (350g at 200°C for 14–15 minutes, no pre-thawing) came out evenly crisped with no soggy undersides. Thin-cut fries at maximum temperature were ready in 13–14 minutes. The fundamental cooking quality between comparably specified air fryers at this capacity is closely matched — the AF100UK handles the standard family chip test as well as any fryer at this price point.
Chicken
Three bone-in chicken thighs (approximately 550g total) at 180°C for 20 minutes produced even golden-brown colouring across the skin surface and fully cooked meat throughout. The auto-pause function was used twice to check progress — each time the basket was removed, the timer held, and cooking resumed from the correct remaining time when the basket was replaced. Ninja specifies the 3.8L basket fits a full 1.35kg chicken; cook time at 180°C for a whole bird of this size is approximately 50–55 minutes with the internal temperature confirmed at serving.
Dehydrating
The Dehydrate function is the AF100UK’s most distinctive feature relative to other single-zone fryers in this guide. Set at 60°C — Ninja’s recommended starting point for most fruits — the function runs the fan at low temperature for extended periods, removing moisture through continuous air circulation.
Apple slices at 60°C for three 60-minute cycles produced correctly dried, pliable apple chips with concentrated flavour comparable to shop-bought dehydrated fruit. Banana slices for four cycles produced a firmer, thoroughly dried result. Herb dehydration (basil, thyme) at 55°C for 90 minutes produced dry, crumble-ready herbs with intact colour and aroma. The 60-minute maximum timer requires manual restart for longer dehydration sessions — the AF100UK does not run unattended for multi-hour sessions without intervention. For occasional fruit and herb dehydration this is manageable; for serious regular dehydrating, a dedicated dehydrator would serve better.
Vegetables and Reheating
Mixed vegetables (peppers, courgette, red onion at 180°C for 12 minutes) produced caramelised edges and tender centres consistent with other air fryers in this guide at the same settings. Broccoli at 200°C for 8 minutes produced lightly charred tips and crisp stems.
The dedicated Reheat function is one of the AF100UK’s most underappreciated day-to-day features. Reheating leftover chips at 180°C for 4–5 minutes restores crispness that a microwave cannot replicate. Reheating pizza slices at 180°C for 3–4 minutes produces a crisp base and melted cheese closely resembling the original — where a microwave produces a soggy, uneven result. For households that regularly cook in advance or reheat takeaway, the Reheat function is a genuine value-add over fryers requiring manual temperature setting for reheating tasks.
Ease of Use
The AF100UK strikes the right balance between simplicity and control for first-time digital air fryer users. Select a function, use the arrow buttons to set temperature and time, press start. The display shows all three parameters simultaneously — there is no nested menu to navigate. The auto-pause removes the single most common source of uncertainty for new air fryer users. For experienced users, the four-function simplicity may feel limited compared to models with 9–13 one-touch presets — each cook requires manual temperature and time input. This is a minor inconvenience for experienced users and not a barrier for beginners, who quickly learn the two or three settings they use regularly.
Cleaning and Maintenance
The basket and crisper plate are both dishwasher safe, covering the primary daily cleaning requirement. A hot water rinse immediately after cooking handles most everyday use without requiring the dishwasher. The non-stick coating releases food cleanly and the basket’s proportions make hand-washing straightforward. The exterior wipes down with a damp cloth.
Non-stick coating longevity is the most consistent concern in long-term AF100UK reviews, as with most air fryers in this price bracket. Avoiding metal utensils inside the basket, not using abrasive cleaning products on the non-stick surface, and rinsing promptly after cooking all extend coating lifespan. Hand-washing remains preferable to the dishwasher for maximising coating life over years of daily use — though the coating holds through regular dishwasher cycles in testing.
How Does the Ninja AF100UK Compare?
Ninja AF100UK vs Tower T17021
The Tower T17021 (4.3L, £49–£69) has a larger basket, a lower price, manual analogue dials and a 3-year registration guarantee. The Ninja AF100UK (3.8L, £69–£89) adds a digital display, auto-pause safety, Dehydrate capability and Ninja’s premium build quality in a significantly more compact footprint. For buyers who want the simplest effective air fryer at the lowest price with maximum capacity, the Tower is the stronger value choice. For buyers who want digital precision, auto-pause safety and Dehydrate capability — the Ninja AF100UK justifies its higher price.
Ninja AF100UK vs COSORI Pro 5.5L
The COSORI Pro (5.5L, £89–£119) has a larger basket, a digital display, up to 13 one-touch preset programmes and optional smartphone app connectivity. The Ninja AF100UK (3.8L, £69–£89) costs less, has Ninja’s superior build quality, auto-pause safety and Dehydrate as a dedicated function. For households needing maximum capacity and preset variety, the COSORI is the better choice. For households prioritising a compact footprint and Ninja’s brand assurance, the AF100UK is the right decision.
Ninja AF100UK vs Philips HD9270 Airfryer XL
The Philips HD9270 (6.2L, £129–£149) has a substantially larger basket at a premium price. The Ninja AF100UK (3.8L, £69–£89) is available at less than half the price for a smaller household. For families of 5–6 who need maximum single-basket capacity, the Philips is the better choice. For households of 2–4 where compactness and value are the priorities, the AF100UK matches the Philips’ cooking quality for everyday meals at a significantly lower cost.
Final Verdict: Should You Buy the Ninja AF100UK?
The Ninja AF100UK has earned its 4.8-star rating and 6,336-review count by delivering exactly what entry-level Ninja buyers need: digital precision, auto-pause safety, four genuinely useful cooking functions including Dehydrate, and Ninja’s characteristic build quality in a compact 27.9 cm footprint at a competitive price. The 50% faster cooking claim versus fan ovens, 55% energy saving versus conventional ovens and 75% fat reduction versus deep frying are all substantiated by real-world testing at Ninja’s specified settings.
Its trade-offs are honest: no one-touch preset programmes (each cook requires manual temperature and time input), a 3.8L basket smaller than several competitors at a similar price, and a 2-year guarantee versus the 3 years offered by Tower. None of these limitations undermine the core cooking proposition for households of 2–4 who want the most capable compact single-zone air fryer Ninja makes at the entry-level price point.
For buyers who want Ninja build quality, digital control, auto-pause safety and Dehydrate capability in the most compact Ninja package available — the AF100UK remains the best-value entry point into the Ninja air fryer range in 2026.
