FAQ — Letnexus
FAQ

Questions from Amazon sellers.

Everything you need to know about Letnexus, RUFUS scoring, and AI image generation.

General
Letnexus is an AI-powered Amazon listing visual optimization tool. You paste an ASIN, and we score your listing images across 10 dimensions using AI Vision — the same way Amazon's RUFUS AI reads your listing. Then we generate targeted image briefs and create professional AI listing images to fix the gaps we found.
RUFUS is Amazon's AI shopping assistant launched in 2024. It's used by 300M+ Amazon buyers and reads your listing images to answer buyer questions like "Is this safe for kids?" or "What size do I need?" If your images don't answer these questions visually, RUFUS recommends competitors instead. Your VAS score tells you exactly how well your listing passes the RUFUS visual check.
No. You just paste the ASIN. Letnexus fetches your live listing directly from Amazon — no Seller Central login, no API connection, no permissions required. It works for any Amazon.com ASIN, for any seller.
Helium 10 and Jungle Scout are keyword and text optimization tools. They help you find keywords and optimize your bullet points. Letnexus is a visual tool — it analyzes your listing images, identifies visual gaps, and generates AI images to fix them. These tools are complementary, not competitive. Use both.
Scoring
The Visual Authority Score (0–100) is a weighted average of 10 dimensions: Hero Image (18%), Infographics (14%), Lifestyle Shot (12%), Benefit Callouts (10%), A+ Content (12%), Video (10%), Trust Signals (8%), Size Reference (7%), Mobile Optimised (5%), Branding (4%). Each dimension is scored 0–15 using Gemini AI Vision analysis of your actual listing images.
Most sellers are surprised by their score because they look at their listing and think it looks fine. The score reflects what Amazon's AI sees, not what looks good to the human eye. The most common reason for low scores is missing lifestyle images (no people using the product), no infographics with feature callouts, and no size reference images. These three account for most of the score gap.
Wait at least 24–72 hours after uploading new images to Amazon before rescanning. Amazon takes time to index new listing images in their CDN. Rescanning too early will show the same old score even if you've uploaded better images. Most sellers see a 30–50 point VAS improvement after uploading lifestyle, infographic, and size images.
Indirectly, yes. Your VAS score reflects how well your listing performs for RUFUS recommendations. RUFUS drives a significant share of Amazon discovery and conversions. Better images → higher RUFUS recommendation rate → more organic traffic and better conversion rate → which signals quality to Amazon's A9 ranking algorithm → which can improve organic ranking over time.
Image Generation
Letnexus uses Gemini's most advanced image model and achieves 90–98% product identity accuracy when you provide 3+ reference photos. The key is the DNA extraction step — we lock your exact product shape, colors, materials, and distinctive features before generating. Upload photos from different angles for best results.
Yes. Generated images are 4K resolution and meet Amazon's image requirements for secondary slots. We recommend reviewing each image before uploading. The AI disclaimer in the app reminds you to review and verify outputs before use. For hero/main images, Amazon requires a pure white background with real product photos.
Upload 3–6 photos showing your product from different angles: front, side, back, close-up of distinctive features, and packaging if relevant. Higher quality photos = better DNA extraction = more accurate generated images. JPG, PNG, and WebP are all supported. Images are auto-compressed to optimize for AI processing.
It depends on your plan. Each image generation costs 3 credits. Starter (300 credits) gives ~100 images. Growth (1,000 credits) gives ~333 images. Pro (2,500 credits) gives ~833 images. VAS scans are always free and unlimited across all plans.
Pricing & Billing
No. Credits reset at the start of each billing cycle. Unused credits do not roll over. VAS scans are always free and do not use credits.
Yes. Cancel from your account settings at any time. Your plan remains active until the end of the billing period. No lock-in contracts, no cancellation fees.
All major credit and debit cards via Stripe. Payments are processed securely — Letnexus never stores your card details.
VAS scanning is always free with no credit card required. Paid plans don't have a trial period, but you can start with the Starter plan and upgrade at any time. The free plan lets you fully experience the scanning and gap analysis before committing to image generation.

Still have questions?

Our team responds within 24 hours. Or start with a free scan — no questions needed.