HadaBuddy vs Glass: Which Skincare App Should You Actually Use?
Glass tracks your face with weekly skin scans and progress photos. HadaBuddy turns your shelf into an AM/PM routine and flags ingredient conflicts. Here's an honest comparison of where each one fits.
Glass (tryglassskin.com) is a newer iOS skincare app that combines a selfie-based skin scan with routine tracking and a daily journal. HadaBuddy approaches the problem from the other side: scan your shelf, get a routine built from your products, with conflict detection. Here's an honest comparison of where each one wins and where each falls short.
The short answer
Use Glass if you want to track your skin over time with weekly selfie scans, see a progress score for hydration, texture, and irritation, and read editorial roundups of new products to try.
Use HadaBuddy if you want an AM/PM routine built from your shelf, with ingredient-level conflict detection, climate-aware adjustments, and the ability to scan a new product in-store and see whether it fits your routine before you buy.
Glass measures your face. HadaBuddy measures your shelf. They answer different questions about the same routine.
What Glass does well
Glass's pitch is calm, daily skincare. Take a weekly selfie, log your products, see how your skin trends. The app is well-designed and the journal content (Sephora-focused product roundups, K-beauty toner picks, glass-skin guides) is polished.
Strengths:
- Selfie skin scanning. Weekly photo-based scoring across hydration, texture, irritation, and acne. You see a trend line over months.
- Progress photos. Built-in photo log so you can A/B your face from a month ago against today.
- Routine logging. Mark products as used in your AM/PM and see consistency stats.
- Editorial journal. Long-form articles on Korean skincare, Sephora picks, and glass-skin routines. Useful for inspiration.
- Calm UI. Less gamified than most skincare apps. The tone is closer to a reading app than a tracker.
- Reminders. Daily nudges to apply or log your routine.
Where Glass falls short
Glass is built around tracking your face, not solving the underlying skincare problem. It tells you if you're improving. It doesn't always tell you why, or what to change.
1. The selfie scan is a measurement, not a fix.
A weekly skin score is satisfying, but it's a lagging indicator. By the time your hydration score drops two weeks in a row, you've already been over-exfoliating. HadaBuddy works on the input side: it tries to stop the bad week from happening by catching ingredient conflicts and over-stacking before you put the products on your face.
2. Limited product-level analysis.
Glass logs the products in your routine, but it doesn't analyze them at the depth of a dedicated scanner like SkinSort, Yuka, or HadaBuddy. The ingredient breakdown, conflict checks, and skin-type matching are lighter than what a scanner-first app gives you.
3. No automatic routine generation.
You log the routine you already have, you don't get one built for you. If you walked in with twelve products and no clue what order to use them, Glass won't sort them into a coherent AM/PM. HadaBuddy generates the full 7-day routine from a fresh shelf scan.
4. No ingredient conflict detection.
Glass tracks usage and progress. It doesn't actively flag that the retinol you logged last night and the AHA toner you logged tonight are stacking on the same skin barrier. HadaBuddy has 150+ rules for known conflicts plus AI-augmented checks on Pro.
5. Journal content is product discovery, not personalized.
Glass's journal pushes Sephora roundups and trending K-beauty picks. That's useful if you're shopping. HadaBuddy stays out of the recommendation business: instead of telling you what to buy, it works with whatever's on your shelf, and lets you scan a new product on the spot to check whether it actually fits your routine before you commit.
6. Selfie tracking depends on lighting.
Skin-scoring algorithms are sensitive to lighting, makeup residue, and time of day. Without a controlled setup, the scores are noisy week to week. Useful as a long-term trend, less useful as a weekly verdict.
What HadaBuddy does well
HadaBuddy starts at your products, not your face. Scan your shelf and you get a personalized 7-day AM/PM routine. Find a new product in a store? Scan it and HadaBuddy checks it against your existing routine, so you can see whether it conflicts, fills a gap, or makes another product redundant before you buy.
Strengths:
- AI-built 7-day routines. Full AM and PM for each day, with active rotation (retinol some nights, exfoliant others, rest nights in between).
- In-store product checks. Scan a new product before you buy. HadaBuddy compares it against your existing shelf, flags ingredient overlap or conflicts, and shows where it would slot into your AM/PM.
- Specific conflict detection. 150+ rules for retinol + AHA, vitamin C + benzoyl peroxide, niacinamide + direct acids, plus AI-augmented edge cases on Pro.
- Climate-aware. Adjusts for your location, season, and humidity. Lighter textures in summer, richer in winter.
- Skin profile-driven. Routines change based on skin type, concerns, sensitivities, and known irritants.
- K-beauty coverage. Strong database support for COSRX, Beauty of Joseon, Anua, SKIN1004, Torriden, Laneige, Innisfree, and other Korean brands.
- On-device scanning. OCR and barcode lookups run locally. Photos stay on your phone.
- Skin Advisor chat. Ask questions about your specific routine, products, or ingredients (Pro).
Where HadaBuddy falls short
- No selfie skin scan. HadaBuddy doesn't grade your face. If progress tracking by photo is the feature you care about, Glass wins on that axis.
- No progress photo log. No built-in A/B tool for comparing your face over time.
- iOS only. Same as Glass for now, but HadaBuddy is also Android-pending while Glass is iOS-only at writing.
- No editorial journal. HadaBuddy publishes a blog (you're reading it) but it's not a Sephora-shopping or product-discovery channel. We deliberately don't tell you what to buy.
- Smaller user base than mainstream scanners. Glass and the bigger scanners have more App Store reviews and social proof.
Feature comparison
| Feature | Glass | HadaBuddy |
|---|---|---|
| Selfie-based skin scan | Yes (weekly) | No |
| Progress photo tracking | Yes | No |
| Product / shelf scanning | Light (logging) | Yes (deep ingredient analysis) |
| Barcode scanner | Limited | Yes |
| Photo / OCR scanning of products | Limited | Yes (on-device) |
| AI routine generation (AM/PM, 7 days) | No | Yes |
| Ingredient conflict detection | No | Yes (150+ rules + AI) |
| Climate / season awareness | No | Yes |
| Skin profile personalization | Skin score over time | Full profile-based analysis |
| Routine consistency / habit tracking | Yes | Light |
| Editorial / journal content | Yes (Sephora, K-beauty roundups) | Blog (independent, no shopping push) |
| K-beauty brand database | Light | Strong |
| On-device privacy | Cloud (selfie-based) | On-device scanning |
| iOS | Yes | Yes |
| Android | No | No (planned) |
| Free tier | Limited (subscription for full features) | Unlimited scans, 7-day routines, basic conflict detection |
| Paid tier | Subscription | $3.99/month or $29.99/year |
When to use both
Glass and HadaBuddy aren't really competitors. They sit on opposite sides of the same routine.
- Use HadaBuddy to decide what your routine should be: scan your shelf, get the AM/PM order, fix the conflicts.
- Use Glass to track how your face responds to that routine: take the weekly selfie, watch the trend lines.
The combo is genuinely useful. HadaBuddy fixes the inputs. Glass measures the outputs. If you have to pick one, ask yourself: do you know what your routine should be? If yes, Glass for tracking. If no, HadaBuddy first.
The bottom line
Glass is a beautifully designed face-tracking app with a lifestyle journal attached. It's good at making skincare feel like a habit and showing you progress over time.
HadaBuddy is the engine behind the routine itself. It reads your products, builds the schedule, and stops you from layering things that fight each other on your face. The two solve different parts of the problem, but if your routine isn't sorted yet, fixing the inputs (HadaBuddy) matters more than measuring the output (Glass).
Download HadaBuddy on the App Store. Free on iOS.
FAQ
Does Glass build a routine for me?
Not in the sense of generating one from scratch. Glass logs the routine you already have and tracks your consistency. HadaBuddy generates the full AM/PM order for 7 days from your scanned products.
Does Glass detect ingredient conflicts?
Glass tracks what you use but does not actively flag known ingredient interactions between your products. HadaBuddy has 150+ rules covering retinol + AHA, vitamin C + benzoyl peroxide, niacinamide + direct acids, and similar conflicts.
Is the Glass selfie skin scan accurate?
Selfie-based scoring is sensitive to lighting, makeup, and time of day. It's most reliable as a long-term trend (months) rather than a weekly verdict. Useful as a feedback loop, less useful as the only signal.
Which app is better for K-beauty users?
HadaBuddy has the deeper K-beauty database (COSRX, Beauty of Joseon, Anua, SKIN1004, Torriden, Laneige, Innisfree, Missha, and more), so most Korean products are recognized when you scan a barcode or photo of the English ingredient list. Glass references K-beauty heavily in its journal but doesn't analyze the products at the depth a scanner-first app does.
Can I use Glass and HadaBuddy together?
Yes, and it's a sensible combo. HadaBuddy decides the routine, Glass measures how your skin reacts. Both are iOS apps, both have free tiers.
Which one is more private?
HadaBuddy runs OCR and barcode scanning on-device; product photos stay on your phone. Glass relies on selfie photos that are processed for skin scoring, which is a heavier privacy footprint by design.
Further reading: HadaBuddy vs Yuka · HadaBuddy vs SkinSort · HadaBuddy vs OnSkin · Best skincare scanner apps compared · How to build a routine from what you already own