Comparison

Shapr 3D CAD modeling vs CRUMB

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

Head to head
About

Shapr 3D CAD modeling

This tool offers an intuitive 3D design workflow across multiple devices, enabling seamless collaboration and manufacturing readiness. Its adaptive interface and AR rendering simplify complex modeling for teams and individuals.

Highlights
  • Multidevice and offline capability
  • Adaptive user interface
  • Design-driven collaboration
  • Real-time 3D renders in AR
  • Export/Import support for various formats
  • Output 2D Drawings
Read full description

From design to manufacturing. Teams collaborate with more impact. Instinctive design meets multidevice capability and full interoperability for the ultimate 3D design workflow. All platforms Pick your device and your input tool leveraging the first CAD tool envisioned for multidevice. Hybrid workflow meets cross-functional team processes with automatic sync across devices. Work from any device or offline: design and collaborate at your best, everywhere. Compact tools. Space for focus. An adaptive user interface auto-sorts tools, taking the clutter out of designing. Your focus stays front and center to eliminate clunking around and prioritize high-quality decisions. Design-driven collaboration. Make designing a reflex and visual communication second nature for the whole team. Instinctive CAD meets a visual communication bundle complete with real-time 3D renders in AR, shareable via a link for download-free viewing. Start where you are and finish strong – no expensive hardware needed. Shapr3D combines industrial-grade CAD with a user-friendly experience, including: • Siemens™ geometric Parasolid® modeling kernel and D-Cubed™ sketch engine • Export support for X_T, STEP, STL, OBJ, 2D DXF, 2D DWG, IGES, 3MF, SVG • Import support for SLDPRT, SLDASM, X_T, STEP, STL, IGES, 2D DWG, 2D DXF, JPG, PNG • Output 2D Drawings Get in touch Have a question? Visit our forum: https://discourse.shapr3d.com. For support queries, please submit a request here: https://shapr3d.com/support Terms of Use: https://www.shapr3d.com/terms-of-use Privacy Policy: https://www.shapr3d.com/privacy-policy

About

CRUMB

Explore and build electronic circuits in an interactive 3D environment. Learn circuit basics, experiment with components, and analyze performance with built-in tools without the risk of damaging real parts.

Highlights
  • Interactive 3D circuit construction
  • Wide selection of electronic components
  • Study transistors and audio filtering
  • Program EEPROMs
  • Built-in oscilloscope and analysis views
  • Prototype analysis before real-world construction
Features
Currently charting
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CRUMB offers an easy to use and interactive introduction to electronic circuits Fully realised in 3D, you can construct prototype circuits as you would at the workbench without the risk of terminal component failure or the hassle of ordering individual components CRUMB comes with a great selection of components to allow you to jump straight in to creating prototype circuits With the catalogue available, it is possible to study the workings of transistors & audio filtering, all the way to programming an EEPROM to run a basic program For the beginner, it is possible to learn and understand the basics of interactivity, and for the enthusiast it is possible to analyse and perfect prototypes before constructing real world models Using the built in oscilloscope and analysis views, it is possible to see clearly the interaction between components from within the wires themselves Through community feedback and suggestion, there will be many more components and features added. For a full feature list and development schedule please visit the website http://www.crumbsim.com

Screenshots

Shapr 3D CAD modeling4 screens
CRUMB4 screens

Verdict

The call

The clearest difference is price: Shapr 3D CAD modeling at Free against CRUMB's $7.99. Shapr 3D CAD modeling also leads on rating (4.7 vs 4.4) and ratings volume (34K vs 146). CRUMB's advantage is in-app purchases (none vs 6) and chart position (#79 vs unranked). On review sentiment, update cadence, ads and device support 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

Shapr 3D CAD modeling is free to download; CRUMB costs $7.99 up front. Shapr 3D CAD modeling sells 6 in-app purchases, starting at $32.99 per month. CRUMB asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Shapr 3D CAD modeling holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Shapr 3D CAD modeling has 34K ratings behind it against 146, so its average is the more settled of the two. Written reviews complicate that: 52% of Shapr 3D CAD modeling's written reviews are positive against 56% of CRUMB's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on November 8, 2026 and November 7, 2026 respectively.

Scorecard7 real differences · 4 level
Shapr 3D CAD modeling versus CRUMB: the parameters behind the verdict, then further details
ParameterShapr 3D CAD modelingCRUMB
PriceFree — better$7.99
Rating4.7 (34K ratings) — better4.4 (146 ratings)
Positive reviews52.4% of reviews55.6% of reviews — better
Number of ratings34K — better146
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank—#79 — better
DevicesiPhone, iPad, Mac, Vision Pro — betteriPhone, iPad, iPod
Requires iOS17.013.0 — better
Further details — not scored
Size1.9 GB496 MB
Age rating4+4+
DeveloperShapr3D ZrtVital Group Limited

Customer experience

Shapr 3D CAD modeling

All ratings34,246 ratings
Positive94.8%
Neutral1.5%
Negative3.6%
Written reviews828 reviews
Positive52.4%
Neutral12.6%
Negative35.0%

CRUMB

All ratings146 ratings
Positive84.9%
Neutral2.7%
Negative12.3%
Written reviews36 reviews
Positive55.6%
Neutral0.0%
Negative44.4%

User reviews

Shapr 3D CAD modeling

From 34K App Store ratings

What we love

  • 🚀 Super easy to use
  • 👍 Intuitive interface
  • 🚀 Powerful features
  • 👍 Great for beginners
  • 👍 Excellent tutorials

Room to improve

  • 💰 Expensive subscription
  • 💰 Pricing not suitable for hobbyists
  • 🔒 Limited free version
  • 🐛 Occasional bugs and crashes
  • 👎 Navigation and controls could be improved

CRUMB

From 146 App Store ratings

What we love

  • 👍 Great for beginners
  • 💡 Good for learning new skills
  • ✨ Simple to put things together
  • 🎨 Great graphics
  • 🧩 Plenty of components

Room to improve

  • ❌ Very limited components
  • ❌ Lacks modern components
  • 🐛 Crashing frequently
  • 🐛 App crashes when using corners
  • 🐛 Crashing on Mac

Bugs and requests

Shapr 3D CAD modeling

Reported bugs

3 issues
  • Unreliable performance after recent updates
  • Difficulty deleting or modifying existing designs
  • Inconsistent behavior when using the Apple Pencil

Requested features

6 requests
  • Add more affordable pricing tiers for hobbyists
  • Improve undo/redo functionality
  • Implement better file management and organization
  • Add support for importing/exporting more file formats
  • Enhance parametric modeling capabilities
Show 1 more
  • Introduce a one-time purchase option

CRUMB

Reported bugs

11 issues
  • App crashes when using the “corners” option on jumper wires
  • Experienced some crashing on Mac
  • Component images do not rotate
  • Power rails are backwards related to real life breadboards
  • Program counters (74HC161) do not reset to 0 on a reset signal
Show 6 more
  • 74HC245 enable pin should be labeled active low but it’s not
  • EEPROM sometimes corrupts the data saved in the HEX editor
  • Many components, most commonly the transistor, lock their image in place even if deleted
  • Buttons and switches will react to touching the screen even when not touching the component location
  • Rotation is broken on the app version
  • UI can be a little flaky at times

Requested features

31 requests
  • Implement modern components (TI IC, LTC series)
  • Add 12 segment display
  • Add Arduino and other microcontrollers
  • Add a spot to code Arduino/microcontrollers
  • Allow custom wire colors
Show 26 more
  • Create circuit boards with custom colors
  • Add pre-made circuit boards
  • Ability to create custom electronic components from circuits
  • Improve corner-to-corner wire mode for breadboard/power rail connection
  • Add snap rotations and positions
  • Add CD4511 component
  • Add oscilloscope
  • Add signal generator
  • Add BJT transistors
  • Add op amp
  • Add MOSFETs
  • Add transformers
  • Add relays
  • Add AC power supply
  • Add music player for amplifier learning
  • Add more examples of classic circuits
  • Simulation pausing
  • Add hotkeys to desktop version
  • Add resistance monitoring view
  • Allow push buttons to be placed across rails
  • Add 'Show Pins' view to app version
  • Add schematic feature
  • Add manual
  • Add more functions and components
  • Add more examples
  • PC integration

In-app purchases

6 purchases

Shapr 3D CAD modeling

Subscriptions6
  • Solo Subscription14 Days trial$32.991 Month
  • Pro Subscription14 Days trial$37.991 Month
  • Business Subscription14 Days trial$59.991 Month
Show 3 more
  • Solo Subscription14 Days trial$249.991 Year
  • Pro Subscription14 Days trial$299.991 Year
  • Business Subscription14 Days trial$499.991 Year
None

CRUMB

No in-app purchases

Questions

Is Shapr 3D CAD modeling free?
Shapr 3D CAD modeling is free to download, with in-app purchases available.
Is CRUMB free?
CRUMB costs $7.99, with no in-app purchases.
Which has better reviews, Shapr 3D CAD modeling or CRUMB?
Shapr 3D CAD modeling is rated higher. Shapr 3D CAD modeling averages 4.7 out of 5 from 34K ratings, while CRUMB averages 4.4 from 146 ratings.
Do Shapr 3D CAD modeling or CRUMB have ads?
Neither Shapr 3D CAD modeling nor CRUMB shows ads.
Which is updated more often, Shapr 3D CAD modeling or CRUMB?
Shapr 3D CAD modeling ships an update weekly, and CRUMB weekly. Most recently, Shapr 3D CAD modeling was updated on November 8, 2026 and CRUMB on November 7, 2026.

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