Comparison

Calvis vs Watch Authentication

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calvis

Easily book and manage security services. For security personnel, this platform simplifies shift pickup and ensures prompt payment.

Highlights
  • Book security services
  • Manage security bookings
  • Pick up security shifts
  • Seamless payment for guards
  • Future of security management
Features
Read full description

Book and manage security with ease. For guards, use Calvis to pick up shifts and get paid seamlessly.

About

Watch Authentication

Features
Read full description

Watch Authenticator Watch Authenticator turns your iPhone into a luxury-watch verification tool. Snap a single photo — our AI identifies the brand, reference, model, and year, estimates market value, and walks you through a component-by-component authentication check. Get a professional PDF report you can share with a seller, buyer, or insurer. WHO IT'S FOR Buying pre-owned and want a second opinion before you wire money Selling a watch and need credible documentation of authenticity Inheriting a piece and want to know what it actually is Collectors who want a paper trail for their wrist WHAT YOU GET Instant brand + reference identification with confidence scoring Market value estimate (low / high) based on a 33,000+ watch database Multi-step authentication: dial, bezel, crown, caseback, rehaut, movement, and more Per-component scoring and an overall verdict (likely authentic / inconclusive / suspect) A holistic AI-generated comprehensive report that cross-checks every photo together A polished PDF you can share, print, or attach to a listing HOW IT WORKS Tap "Scan a Watch" and take a clear photo of the dial We identify the brand, reference, and price range in seconds Tap "Authenticate" — we tell you exactly which photos to take next Each check is scored independently and stored with your scan Generate the AI Report when you're done — and export the PDF POWERED BY GPT-4o VISION We use OpenAI's latest vision model to identify brands and assess authenticity markers. The model is calibrated against a hand-curated database of 33,000+ watches across 32 luxury brands including Rolex, Omega, Patek Philippe, Audemars Piguet, Vacheron Constantin, IWC, Tudor, Cartier, and more. PRICING 10 free identification scans 1 free full authentication report on every new device Pay-per-report packs: 1 report + 5 scans for $2.99 · 5 reports + 30 scans for $7.99 · 15 reports + 100 scans for $14.99 Credits never expire. No subscription. PRIVACY Photos are processed by our authentication backend and sent to OpenAI for vision analysis. We do not sell your data. Account credentials are protected via Supabase Auth. Full policy linked from inside the app. DISCLAIMER Watch Authenticator is a decision-support tool, not a substitute for in-person inspection by a certified watchmaker or brand boutique. Final purchasing decisions are your own. Authentication confidence depends heavily on photo quality and visible components. Got questions? Tap "Account" → contact support, or email d9designk@gmail.com.

Screenshots

Calvis4 screens
Watch Authentication4 screens

Verdict

The call

The clearest difference is in-app purchases: Calvis at none against Watch Authentication's 3. Calvis also leads on update cadence (weekly vs monthly). Watch Authentication's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.2). On price and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Watch Authentication sells 3 one-off in-app purchases. Calvis asks for nothing beyond the download.

UpkeepUpdate frequency

Calvis ships an update weekly, Watch Authentication monthly. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

Scorecard4 real differences · 6 level
Calvis versus Watch Authentication: the parameters behind the verdict, then further details
ParameterCalvisWatch Authentication
PriceFreeFree
Rating4.7 (13 ratings) — better—
Positive reviews62.5% of reviews—
Number of ratings13 — better—
Update frequencyWeekly — betterMonthly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.213.0 — better
Further details — not scored
Size48 MB39 MB
Age rating4+4+
DeveloperCalvisKaroly Losonc

In-app purchases

None

Calvis

No in-app purchases

3 purchases

Watch Authentication

One-time3
  • Report pack 1$2.99
  • Report pack 5$7.99
  • Report pack 15$14.99

Questions

Is Calvis free?
Calvis is free to download, with no in-app purchases.
Is Watch Authentication free?
Watch Authentication is free to download, with in-app purchases available.
Do Calvis or Watch Authentication have ads?
Neither Calvis nor Watch Authentication shows ads.
Which is updated more often, Calvis or Watch Authentication?
Calvis ships an update weekly, and Watch Authentication monthly. Most recently, Calvis was updated on October 11, 2026 and Watch Authentication on October 7, 2026.

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