Comparison

Rock Identifier | Scan Stone vs DuoView

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

Head to head
About

Rock Identifier | Scan Stone

Instantly identify rocks, crystals, and gemstones using your phone's camera. Get detailed scientific information, build a digital collection, and learn about the mineral world. Perfect for collectors, geologists, and nature enthusiasts.

Highlights
  • Instant AI-powered rock identification
  • Detailed scientific information on specimens
  • Build and manage a digital rock collection
  • Geology guide with origin and composition
  • Save identified finds with notes and locations
Features
Read full description

Rock Identifier | Scan Stone - Your Personal Pocket Geologist Discover the secrets of the mineral world! Turn your phone into a powerful rock scanner with Rock Identifier. Have you ever found a beautiful stone on the beach, a sparkling crystal in the mountains, or an unusual mineral and wondered. Our app, powered by advanced Artificial Intelligence (AI), instantly identifies it. It's the perfect tool for collectors, geologists, travelers, and anyone passionate about nature. - Instant and Accurate Recognition Simply point your camera at a rock, crystal, or gemstone. The app will scan the image and provide an accurate result in seconds. Our database contains thousands of types of minerals and rocks, ensuring the highest level of identification accuracy. - Detailed Information on Every Specimen After a successful scan, you'll receive comprehensive scientific information about your find: Name and Classification: Learn the exact name of the rock, mineral, crystal, or gemstone. Chemical Composition and Formula: Dive into the mineral's chemistry and discover its main elements and impurities. Physical Properties: Get detailed information on hardness (according to the Mohs scale), color, luster, cleavage, and fracture. Origin and Geology: Study how the mineral was formed (igneous, sedimentary, or metamorphic), where it is commonly found, and how rare it is. - Build Your Digital Collection All your identified finds are automatically saved within the app. Manage your collection, add personal notes, mark finding locations, and create your own portable museum of stones. You can add photos, note the date of purchase or discovery, price, and size. - More Than Just an Identifier Rock Identifier is more than just a scanner; it's a comprehensive geology guide. Inside the app, you'll discover: Who is this app for? Travelers and Hiking Enthusiasts: Identify your finds right on the trail. Mineral and Crystal Collectors: Organize your collection and learn more about your specimens. Students and Teachers: A visual and interactive guide to mineralogy and petrology. The Curious Mind: For anyone who wants to learn more about the world beneath their feet. Privacy Policy https://stone-scanner.com/privacy.html Terms of Use https://stone-scanner.com/terms.html

About

DuoView

Record simultaneously with multiple cameras to capture different perspectives in a single take. This app allows for split-screen or picture-in-picture layouts, high-quality video output, and real-time control for efficient content creation.

Highlights
  • Dual camera recording
  • Portrait and landscape in one take
  • Split screen and overlay modes
  • High-quality video (4K, 1080p)
  • Real-time preview and control
  • Time-lapse recording
Features
Read full description

DuoView – Record with Two Cameras at Once Capture more in every shot with DuoView, a powerful dual camera app designed for creators, storytellers, and everyday users. Record with multiple cameras at the same time and create high-quality videos in a single take without filming twice. Whether you are vlogging, traveling, interviewing, or creating content for social media, DuoView helps you capture every perspective with ease. How Does DuoView Work? DuoView uses advanced camera technology to record video from multiple lenses simultaneously. With one tap, you can capture synchronized footage and save it directly to your device, ready to edit or share. DuoView can help you: ► Record with multiple cameras at once ► Capture both portrait and landscape video ► Create content without switching lenses ► Save time with one-take recording ► Produce ready-to-share videos instantly With DuoView, you will get: DUAL CAMERA RECORDING Record with multiple cameras at once, including wide, ultra-wide, front, and back lenses. Capture different perspectives in perfect sync. MULTIPLE RECORDING MODES Choose the layout that fits your style: • Split screen for side-by-side video • Overlay mode for picture-in-picture • Single camera mode with flexible switching HIGH-QUALITY VIDEO Record in 4K or 1080p at 24, 30, or 60 fps. Choose between MOV and MP4 formats. PORTRAIT AND LANDSCAPE IN ONE TAKE Capture vertical and horizontal video at the same time, ideal for social media and professional use. REAL-TIME PREVIEW AND CONTROL Adjust layout, zoom, and camera selection before or during recording. See your results instantly. ADVANCED RECORDING OPTIONS • Customizable bitrate for quality control • Apple Log support for advanced workflows • Time-lapse recording • Torch and flashlight control SMART STORAGE MANAGEMENT See real-time storage estimates before recording so you always stay in control. PRIVATE AND SECURE No ads, no tracking, no accounts. Your videos remain on your device. DuoView is perfect for: • Vloggers capturing reactions and surroundings • Travelers documenting experiences from multiple angles • Interviewers recording both sides of a conversation • Content creators making videos for TikTok, Reels, or YouTube • Anyone who wants more creative control in one app DuoView makes multi-camera recording simple and efficient. Capture everything at once, reduce editing time, and focus on creating better content. Requirements Dual camera features require iPhone XS or newer with supported lenses. PREMIUM ACCOUNT IN THE APP • Subscribe to unlock full access to all DuoView features and recording options • Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period • Your account will be charged for renewal within 24 hours prior to the end of the current period • Subscriptions can be managed and auto-renewal can be turned off in your Account Settings after purchase • Any unused portion of a free trial period, if offered, will be forfeited upon subscription purchase For more details, see our: Privacy Policy: https://wachanga.com/privacy Terms of Use: https://wachanga.com/terms

Screenshots

Rock Identifier | Scan Stone4 screens
DuoView4 screens

Verdict

The call

The clearest difference is ads: DuoView at none against Rock Identifier | Scan Stone's shown. DuoView also leads on ratings volume (60 vs 5). Rock Identifier | Scan Stone's advantage is rating (4.6 vs 4.2). On price, update cadence, in-app purchases and monetization model 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. Rock Identifier | Scan Stone sells 2 in-app purchases, starting at $6.99 per 7 days and DuoView sells 11 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Rock Identifier | Scan Stone holds the better App Store score, 4.6 against 4.2. That said, the two scores are not equally well evidenced: DuoView has 60 ratings behind it against 5, so its average is the more settled of the two.

UpkeepUpdate frequency

Rock Identifier | Scan Stone ships an update fortnightly, DuoView every 10 days. The most recent releases landed on October 6, 2026 and October 17, 2026 respectively.

Scorecard3 real differences · 7 level
Rock Identifier | Scan Stone versus DuoView: the parameters behind the verdict, then further details
ParameterRock Identifier | Scan StoneDuoView
PriceFreeFree
Rating4.6 (5 ratings) — better4.2 (60 ratings)
Positive reviews—25.0% of reviews
Number of ratings560 — better
Update frequencyFortnightlyEvery 10 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhoneiPhone, iPod — better
Requires iOS16.015.6 — better
Further details — not scored
Size212 MB110 MB
Age rating4+4+
DeveloperMEGA PROJEKT GROUP DOO NisWachanga LTD

In-app purchases

2 purchases

Rock Identifier | Scan Stone

Subscriptions2
  • 1 week with 3 days trial3 Days trial$6.997 Days
  • 1 week with 3 days trial3 Days trial$8.997 Days
11 purchases

DuoView

Subscriptions6
  • Full aaccess2 variants$3.991 Month
  • Full aaccess$4.997 Days
  • Full aaccess$14.991 Year
Show 3 more
  • Full aaccess$18.991 Year
  • Full aaccess$19.991 Year
  • Full aaccess$24.991 Year
One-time5
  • Full aaccess$7.99
  • Full aaccess$9.99
  • Full aaccess$14.99
Show 2 more
  • Full aaccess$19.99
  • Full aaccess$24.99

Questions

Is Rock Identifier | Scan Stone free?
Rock Identifier | Scan Stone is free to download, with in-app purchases available.
Is DuoView free?
DuoView is free to download, with in-app purchases available.
Which has better reviews, Rock Identifier | Scan Stone or DuoView?
Rock Identifier | Scan Stone is rated higher. Rock Identifier | Scan Stone averages 4.6 out of 5 from 5 ratings, while DuoView averages 4.2 from 60 ratings.
Do Rock Identifier | Scan Stone or DuoView have ads?
Rock Identifier | Scan Stone shows ads; DuoView does not.
Which is updated more often, Rock Identifier | Scan Stone or DuoView?
Rock Identifier | Scan Stone ships an update fortnightly, and DuoView every 10 days. Most recently, Rock Identifier | Scan Stone was updated on October 6, 2026 and DuoView on October 17, 2026.

Other comparisons