LookPrep vs YouCam Makeup

Swipe the table sideways to see both columns.

YouCam Makeup is the answer most “best lip filler app” lists give, and it has earned that. Perfect Corp. states a “Global Community of 300+ Million Users”, the App Store listing shows 4.7 stars from 155,000 ratings, and the app runs in 35 languages. If you want to see fuller lips on your own face inside a minute, this is the shortest route.

The lip tooling is deeper than one slider. Retouch → Lip Plumper adjusts lip size, width and height plus the shape of your cupid's bow, and the top and bottom lips can be customised separately. Lip Reshape, Lip Color with 100+ shades and 7 lipstick textures, and Lip Wrinkle smoothing sit next to it.

Then there is the part a still-image preview cannot do. Perfect Corp. says you can use the lip filler filter in live camera mode, see yourself “from different angles”, and “save it as a photo or video.” Turning your head is the quickest test of whether a lip shape suits you, and only a camera can run it.

• Free at unlimited volume: you can plump your lips a hundred times for $0.
• Breadth: makeup, 60+ hairstyles, hair colour, skin retouch, AI Facelift, nose and jaw shaping, a body editor, outfit swap and image-to-video.
• An AI Agent that takes “any beauty or editing task in plain language” and executes it.
• Perfect Corp.'s business site publishes virtual try-on case studies with M·A·C Cosmetics, Clinique, Aveda, KOSÉ/Decorté and Benefit.

Sources: YouCam Makeup product page and feature FAQ (Perfect Corp.), YouCam Makeup: Face Editor — US App Store listing, in-app purchase prices and privacy label (Apple App Store), Lip Filler Filter: What Would I Look Like with Lip Filler (Perfect Corp.), How to change lip shape on a photo (Perfect Corp.), Perfect Corp. business site and brand virtual try-on case studies (Perfect Corp.), Perfect Corp. Privacy Notice, biometric information section (Perfect Corp.)

LookPrep is not a camera and not an editor. It takes one uploaded photo in a browser and renders the named lip looks you picked, side by side, so you leave with a comparison set rather than one edited selfie.

The difference that matters is vocabulary. Every look is attached to a treatment and an amount: eight filler options across the Juvederm, Restylane, RHA and Revanesse families, with selectable amounts from 0.3 mL to 3.0 mL, and a ninth option, a lip flip measured in 4 or 6 units of neurotoxin because it everts the upper lip rather than adding volume.

It also publishes how sure it is. Each look carries a standardization grade with cited sources: Russian, cherry, cupid's bow definition and natural enhancement are well-defined; keyhole, heart-shaped and butterfly are marked contested and not published as definite outcomes; doll lips is labelled a marketing term. The output is a planning visual, not a medical prediction.

Sources: LookPrep pricing and product overview (LookPrep), LookPrep privacy policy (LookPrep)

A lipstick-and-reshape filter answers “how would this look on me right now.” A treatment preview answers “what do I ask an injector for.” Those are different questions, and the tool that answers one is under no obligation to answer the other.

If the answer is no — fuller lips do not suit your face, or the shape reads oddly when you smile — you have learned that free, in a live camera, and YouCam does that better than any paid still-image tool. If it is yes, the next problem is describing what you want to somebody holding a syringe.

“A bit more, but natural” is where consultations go wrong, and that is the problem LookPrep is shaped around. Neither product decides anything medical: an injector's read of your own anatomy outranks either preview.

Sources: Lip Filler Filter: What Would I Look Like with Lip Filler (Perfect Corp.), LookPrep pricing and product overview (LookPrep)

Everything above is scoped to the consumer products — the YouCam Makeup app and YouCam Online Editor. Perfect Corp. also sells a separate clinic-facing AI aesthetic simulation product that does discuss filler brands and a Botox lip flip, so “YouCam has no filler simulation” is wrong about the company and true only of the consumer app.

Their words for the consumer tools: the in-app one is “Lip Plumper”, and the web one is marketed as an “AI Lip Filler Filter”.

Sources: Lip augmentation filler gallery, Perfect Corp.'s clinic-facing product (Perfect Corp.), Lip Filler Filter: What Would I Look Like with Lip Filler (Perfect Corp.), YouCam Online Editor — Photo Face Editor (Perfect Corp.)

Perfect Corp.'s published notice says that for most Services “neither your facial photo/video nor your facial feature vectors will be stored in our database in any form whatsoever”, with carve-outs for emailed photos (3 years), cloud-processed features (deleted after use) and generative-AI models (up to 1 year, with consent). Its App Store listing separately lists User Content under Data Linked to You; both are its own published statements.

LookPrep uploads by design, so it says what happens next: an 18+ gate and recorded photo-processing consent before anything generates, “We do not use uploaded faces to train LookPrep models”, images kept only for recovery, share pages and abuse prevention, and deletion requestable at /delete-data.

Sources: Perfect Corp. Privacy Notice, biometric information section (Perfect Corp.), YouCam Makeup: Face Editor — US App Store listing, in-app purchase prices and privacy label (Apple App Store), YouCam Online Editor terms of service, including plan prices and deletion windows (Perfect Corp.), LookPrep privacy policy (LookPrep), LookPrep data deletion request (LookPrep)

As of August 18, 2026.

App Store figures are the US storefront, and Perfect Corp. says pricing “may vary by region and current promotions”; Apple lists every active SKU, hence several prices per tier. The web-editor plan prices come from March 2025 worked examples in its terms, because that pricing page returned “CMS content not found” on 18 August 2026.