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Updated: 2026-09-24 · 6 min read · Independent comparison
If you want a see-through glass air fryer built around watching your food cook from every angle — and sweet potatoes are your test case — choose LIWBYYG 4.2L; if you need steam-assisted cooking that keeps sweet potato wedges juicy inside and crisp outside, choose LDAILY 4.7.
• LIWBYYG 4.2L — biggest strength: fully viewable borosilicate glass pot with 360° visibility, 8 presets (including a dedicated sweet potato mode), and a 1200W heating element that reaches temperature fast.
• LDAILY 4.7 — biggest strength: a steam-frying mode that adds moisture while hot air circulates, plus a slightly larger 4.7 QT basket and a broad 180–400°F range for crisp sweet potato fries.
• LDAILY 4.7 — biggest trade-off: the juicy/steam function adds a water-filling step and an after-cook cleaning routine that the LIWBYYG doesn't ask of you.
• Who each pick is for: LIWBYYG suits the cook who wants to watch sweet potatoes brown in real time; LDAILY suits the cook chasing tender-inside, crispy-outside results without hovering.
The LIWBYYG 4.2L is, at its core, an air fryer designed around transparency. The pot is made from borosilicate glass, so you get a 360° view of whatever you're cooking — no peeking through a tiny window, no cracking the drawer. For sweet potatoes specifically, that matters more than it sounds. Sweet potato cubes and wedges go from pale orange to caramelized edges in a fairly narrow window, and being able to see that transition without releasing heat is genuinely useful. The brand even builds in a sweet potato preset among its 8 modes, alongside fries, chicken wings, egg tarts, fish, shrimp, steak and roast meat.
Performance-wise, the 1200W element is the higher-wattage motor of these two, and the description points to rapid heating that cuts preheat time to a few minutes. You can also go fully manual: 1 to 60 minutes and 176°F to 392°F, set on a touchscreen with a digital display. The stainless steel rack lets hot air circulate underneath the food, which is exactly what you want for even browning on cubed sweet potato. The 4.2L (4.44-quart) capacity is pitched at small families or a gathering of friends — enough for a main and a side without cooking in batches.
Cleanup is straightforward: the pot has a non-stick coating and is dishwasher-safe, and the 31.5-inch cord gives you room to place it on the counter. One honest caveat: the design itself warns that opening the lid during cooking causes heat loss and uneven results. That's the trade-off of a lidded glass design — the whole point is that you don't need to open it.
LDAILY 4.7: Who It's For
The LDAILY 4.7 takes a different route to the same destination. Instead of leaning on visibility alone, it adds a steam frying mode — you fill a water tank below the max line, and the unit combines that moisture with 360° hot air circulation. The brand claims up to 95% less oil than traditional frying, and the juicy function is aimed squarely at the classic sweet potato problem: dry, mealy interiors under a crisp shell. Selecting the juicy mode at up to 30 minutes is designed to keep the inside tender while the outside crisps.
The basket is high borosilicate glass and transparent, so you still get to watch your food — you just don't have to, because the steam function is doing the moisture management for you. Materials are BPA-free, PTFE-free and PFAS-free, and the glass basket doubles as a serving vessel, which cuts down on dishes. Capacity is 4.7 QT, a touch more than the LIWBYYG, aimed at individuals, couples or small families on a compact footprint.
Controls are simple: 6 one-touch presets (fries, chicken, steak, seafood, sweet potatoes, nuts), temperatures from 180°F to 400°F adjustable in 5°F increments, a 1–60 minute timer, and automatic pause/resume. Output is 1000W, and the unit carries ETL certification plus built-in overheat protection. Cleaning is dishwasher-safe for both the glass basket and the nonstick crisper plate — though the steam tank needs emptying and cleaning after use, and the brand advises letting everything cool for 30 minutes first.
Buy it if you want juicier sweet potato results with less guesswork, value the slightly larger basket, and don't mind a water-fill step. Skip it if you want the simplest possible workflow with no extra maintenance.
• Best for watching food cook → LIWBYYG 4.2L. True 360° visibility through the glass pot, from any angle.
• Best for juicy sweet potato interiors → LDAILY 4.7. The steam frying mode actively locks in moisture rather than relying on your timing.
• Best for sweet potato fries → LDAILY 4.7. The 180–400°F range in 5°F increments gives finer control for a crisp finish.
• Best for whole or cubed sweet potatoes → LIWBYYG 4.2L. The stainless steel rack and rapid 1200W heating suit even circulation around chunky pieces.
• Best for preset convenience → LIWBYYG 4.2L. 8 presets versus 6, and both include a sweet potato program.
• Best for larger portions → LDAILY 4.7. 4.7 QT edges out 4.2L when you're feeding more than two people.
• Best for low-maintenance cleanup → LIWBYYG 4.2L. Dishwasher-safe glass pot, no water tank to empty.
• Best for smaller counter footprint → LIWBYYG 4.2L. Its 9.84" x 9.84" base is the more compact of the two.
In my opinion, the LDAILY 4.7 is the one I'd buy for sweet potatoes. The steam frying mode solves the single biggest complaint about air-fried sweet potatoes — dry, chalky centers — without requiring you to nail the timing by eye. The slightly larger basket, wider temperature range and finer 5°F adjustments make it the more capable machine for this specific job, and the ETL certification and overheat protection are reassuring touches. I'd only steer you to the LIWBYYG 4.2L if watching your food cook through full 360° glass is the feature you care about most, or if you want the simplest possible cleanup. Check the current price on Amazon before you commit to either.
how to air fryer sweet potatoes
Cut them into even pieces, toss lightly with oil, and use the sweet potato preset on either unit — LIWBYYG runs 176–392°F and LDAILY runs 180–400°F. Keep pieces similar in size so they finish together, and rely on the glass pot to watch browning instead of opening the lid or basket.
how to air fryer sweet potato cubes
Cube them to roughly equal size, spread them in a single layer on the stainless steel rack (LIWBYYG) or crisper plate (LDAILY), and shake once midway. The LDAILY's automatic pause/resume makes that mid-cook shake easy, and its steam mode helps keep cubes from drying out.
how to air fryer sweet potato fries
Cut fries thin and uniform, then cook at the higher end of the range — LDAILY's 400°F max or LIWBYYG's 392°F max. For extra crispness, use LDAILY's fries preset or run LIWBYYG's fries mode, and avoid crowding so hot air reaches every fry.
how to air fryer sweet potato whole
Whole sweet potatoes take the longest, so use the full timer range on either machine (both go to 60 minutes) and pierce the skin first. The LIWBYYG's 360° glass lets you judge doneness without losing heat, while LDAILY's juicy mode helps prevent the center from drying out during the longer cook.
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