Best Difcal Apps

210+ iOS apps curated and reviewed

4.3 avg rating
19 free apps
Updated June 2026

Every iPhone needs a few good difcal apps. We benchmark 210+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Top Picks for Difcal

Rock Identifier: Stone ID#2

Rock Identifier: Stone ID by Next Vision Limited

Gem Mineral Crystal Identifier
Strong Contender
📚 Education
4.7😐(68K ratings)
FreeAdsIn-App Purchases
#34in Education
Rock Identifier: Stone ID screenshot 1
Rock Identifier: Stone ID screenshot 2
Rock Identifier: Stone ID screenshot 3
Rock Identifier: Stone ID screenshot 4
Rock Identifier: Stone ID screenshot 5
Rock Identifier: Stone ID screenshot 6

"Discover stones, gems, and crystals with ease using our all-in-one identifier app. Simply snap a photo or upload an image to learn more about your finds instantly. Start exploring today!"

What We Love

  • 🤩 Accurate rock identification
  • 🤓 Extensive information on rocks
  • 🧠 Helpful for learning about rocks
  • 🪨 Great for rock collectors

Room to Improve

  • 💰 Expensive subscription model
  • 🔢 Limited free scans per day
  • 🔍 Inconsistent accuracy, sometimes wrong
Bubble Level: AR, Angle Finder#3

Bubble Level: AR, Angle Finder by Jens Rieckhof

Inclinometer & Ruler Measure
Worth Considering
🔧 Utilities
4.5😞(664 ratings)
FreeAdsIn-App Purchases
Bubble Level: AR, Angle Finder screenshot 1
Bubble Level: AR, Angle Finder screenshot 2
Bubble Level: AR, Angle Finder screenshot 3
Bubble Level: AR, Angle Finder screenshot 4
Bubble Level: AR, Angle Finder screenshot 5

Transform your phone into a highly accurate bubble level and measurement tool with ease. Ideal for DIY enthusiasts and professionals, this app offers versatile measurement tools, augmented reality features, and simple calibration for precise results. Download now to elevate your projects with unparalleled precision!

What We Love

  • 👍 Simple and easy to use
  • 🔍 Accurate angle measurements
  • 🛠️ Helpful for various tasks (telescopes, leveling, etc.)

Room to Improve

  • 🤑 Expensive ad removal
  • 🤖 Unreliable calibration
  • 💤 Constant interruptions and ads

More Difcal apps to explore

4
3D modeling: Design my model
3D modeling: Design my model
3D modeling: Design my model
Sculpt & sketch digital art
Free

Create stunning 3D models with our advanced modeling tools. Sculpt, texture, and animate with ease to bring your ideas to life in a virtual space. Unleash your creativity today!

🎨 Graphics & Design
(13K)
5
A Guide To Crystals - The CC
A Guide To Crystals - The CC
A Guide To Crystals - The CC
The Citrine Circle
Free

Discover a comprehensive A-Z guide to over 500 crystals and minerals with geological and metaphysical insights, quizzes, and games. Unlock advanced features like cataloguing your collection, exploring 3D models, and learning through Quick Reference Guides. Join us on The Citrine Circle for an immersive journey into the fascinating world of crystals!

🔍 Reference
(4.1K)
6
Molecules
Molecules
Molecules
by Sunset Lake Software
Free

View and manipulate 3D molecular structures using finger gestures. Rotate, zoom, and pan molecules in ball-and-stick or spacefilling modes. Store and load structures for later viewing, and download custom molecules from various sources. Experience hands-on chemistry exploration now!

📚 Education
(166)
7
3D Snap: LiDAR Scanner & Ruler
3D Snap: LiDAR Scanner & Ruler
3D Snap: LiDAR Scanner & Ruler
Room & Floor Plan, AR Measure
Free

Easily measure objects in 3D space using augmented reality technology, allowing for precise measurements without the need for physical tools. Experience a new way to measure and visualize dimensions right from your smartphone - download now and start measuring with ease!

📊 Productivity
(81)
8
Rock ID - Stone Identifier
Rock ID - Stone Identifier
Rock ID - Stone Identifier
Crystal, Mineral, Fossil Guide
Free

Discover, identify, and manage rocks with an AI-powered app. Snap pictures to instantly recognize stones, learn about their characteristics, and build your own rock collection. Subscribe for unlimited access to all features and become a geology expert today.

📚 Education
(2.2K)
9
EMD PTE
EMD PTE
EMD PTE
by Merck KGaA (Darmstadt, Germany)
Free
📚 Education
(121)
10
Aktiv Learning
Aktiv Learning
Aktiv Learning
Chemistry & Math
Free

Discover a cutting-edge Chemistry learning app tailored for students of all levels. Explore interactive lessons, quizzes, and study materials to master complex concepts easily and efficiently. Start your journey to academic excellence today!

📚 Education
(183)
11
Rock & Crystal Identifier
Rock & Crystal Identifier
Rock & Crystal Identifier
ID Crystals Mineral Gem Stones
Free

Crystal is a versatile mobile app that helps users organize their daily tasks, set reminders, and track their progress with detailed analytics. Stay on top of your schedule and boost productivity by downloading Crystal today!

📚 Education
(2.3K)
12
Chemistry. Periodic table. AI
Chemistry. Periodic table. AI
Chemistry. Periodic table. AI
Chemical reactions. Elements
Free

A highly advanced mobile application designed to help users learn and understand various concepts in chemistry through interactive quizzes, visual simulations, and detailed explanations. Dive into the world of chemistry with this innovative app and enhance your knowledge today!

📚 Education
(2.6K)
13
Protractor+
Protractor+
Protractor+
+ Angle Meter & Clinometer
Free

Protractor is a digital angle meter application that accurately measures angles using your device's built-in sensors. Perfect for carpentry, construction, or any task requiring precise angle measurements. Download now and start measuring with ease!

🔧 Utilities
(10K)
14
Stone Identifier
Stone Identifier
Stone Identifier
Rock, Crystal & Gem Scanner
Free

Identify rocks and crystals with ease using our innovative app. Simply snap a photo and receive instant information about the stone's type and properties. Download now to become a rock expert at your fingertips!

📚 Education
(810)
15
Angle Meter 360
Angle Meter 360
Angle Meter 360
Convenient angle meter, finder
Free

A convenient angle meter application that allows you to accurately measure angles on pictures or in real time from the camera. Easily measure unlimited angles simultaneously, scale and move objects, and customize tool colors for visual clarity. Place the tool on the object's contour for instant and precise angle readings.

🔧 Utilities
(327)
16
Protractor (Angle measurement)
Protractor (Angle measurement)
Protractor (Angle measurement)
by Seong Eon Kim
Free
🔧 Utilities
(2)
17
Frequency Analyzer
Frequency Analyzer
Frequency Analyzer
Audio Spectrum, Spectroid, dB
Free

Transform your device into a professional-grade audio analysis suite with industry-leading processing, precision calibration tools, and comprehensive visualization capabilities. Download now and unlock the full spectrum of acoustic measurement capabilities for applications such as acoustic measurement, audio engineering, environmental noise consulting, and more.

🔧 Utilities
(97)
18
Protractor Angle Measure Tool
Protractor Angle Measure Tool
Protractor Angle Measure Tool
Angle Meter · Finder & Level
Free

Transform your iOS device into a precise angle measurement tool with our app, perfect for DIY projects, construction work, and home renovations. Measure angles in multiple formats, receive target angle alerts, and save time with instant, accurate readings, upgrading your work from amateur to expert.

🔧 Utilities
(112)
19
Protractor for Angle Measuring
Protractor for Angle Measuring
Protractor for Angle Measuring
Measure Angles in Few Taps
Free

Transform your device into a pocket angle expert for precise real-time angle measurements with intuitive touch and camera modes. Perfect for architects and quick, reliable assessments on the go. Tap, snap, and assess angles effortlessly with unlimited simultaneous measurements and customizable tools. Enjoy the perfect blend of accuracy and simplicity! Privacy Policy and Terms of Use available at https://www.mindateq.io/privacy-policy and https://www.mindateq.io/terms-of-use.

🔧 Utilities
(976)
20
Stone Identifier.
Stone Identifier.
Stone Identifier.
Identify Gem, Mineral Crystals
Free

Discover the hidden beauty of rocks and gems with our innovative app that uses advanced technology to identify minerals. Unleash your inner geologist and explore the fascinating world of rocks today!

🔧 Utilities
(348)