EdgeSage pairs a deep knife-steel comparator with a real-time AR sharpening coach. Compare any two steels, get the exact grit ladder and angle for the one you're holding, then follow a live bevel overlay stroke by stroke.
iPhone · iOS 17+ · Steel database and AR coach work fully offline
Steel Sage is a searchable database of knife steels with side-by-side comparison charts across edge retention, toughness, corrosion resistance, wear resistance, and ease of sharpening. The AR Coach is a real-time overlay that shows the target bevel angle for the steel and system you're using, with haptic and voice feedback as you work. Every session you log feeds back into the database everyone sees.
Search the database and pull up side-by-side radar and bar charts across five performance axes, composition breakdowns, and plain-language pros and cons.
Answer four questions about how you actually use a knife. Get a ranked shortlist, each with a one-tap path straight to its sharpening recipe.
Point your phone at the stone. A live overlay marks your target angle and tracks your actual angle as you work, with haptic and voice correction when you drift.
Freehand stones, Wicked Edge, KME, Lansky, Work Sharp, and strops — pick your setup and the coach adjusts its guidance to match.
A library for the knives you own, with full sharpening history, a sharpness trend line, and maintenance reminders when it's time again.
Chat about steels in plain language, or point the camera at an unmarked blade for a steel guess. Both run through a server-side proxy — no key ever ships in the app.
This is the whole idea in one path: any steel in the database is one tap from a loaded AR session, and every session you log makes the next person's recipe a little more accurate.
Find your steel or run the Wizard. See how it stacks up on edge retention, toughness, and the rest.
Steel Sage hands off the grit ladder and target angle straight to the coach — no manual lookup.
A live overlay holds you at the target angle. Haptic and voice feedback tell you when you've drifted.
Rate how the steel held up. It's anonymous, optional, and it's what keeps the whole database current.
The Steel Leaderboard is built from anonymous session reports, not lab numbers alone. Submit one after a sharpening session and you're looking at how a steel is actually performing for people using it — never gated behind Pro.
The steel database and the AR coach need no account and no network — they work fully offline from first launch. Your knives and sharpening history live on your device. Signing in adds sync across devices and lets you submit to the community leaderboard.
The free tier is genuinely useful on its own. Pro removes the limits and adds exports and extra Grok headroom for people sharpening constantly.
Prices in USD, billed through the App Store. No free trial currently offered.
iOS first, Android to follow. Check back here — this page updates the moment the App Store link is live.
