Comparison

CSiUnits vs PIX4Dcatch

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

Head to head
About

CSiUnits

This application provides a comprehensive tool for converting units across various scientific disciplines and everyday needs. It offers over 70 conversion options, catering to professionals, students, and anyone requiring precise unit transformations.

Highlights
  • Multiple one-time conversion lists
  • Conversions for lifestyle and science
  • Over 70 conversion options
  • Numeric value input
  • Converted values to all possible units
Read full description

CSiUnits is an app that helps in conversion of units. Target Users: • Individuals who need simple to complex unit conversion • Engineers, consultants and various professionals • Students and faculty Key Features: • Multiple one time conversion list • Conversions for various lifestyle needs and branches of science • More than 70 conversions to choose from Key Input: • Numeric value to be converted • Selected primary unit Key Output: • Converted values to all possible units

About

PIX4Dcatch

Transform your mobile device into a powerful 3D scanner. Capture images and LiDAR data to create accurate 3D models for professional use. Visualize, measure, and share your creations in AR.

Highlights
  • 3D model creation from images and LiDAR
  • RTK device compatibility for centimeter accuracy
  • Live feedback during capture
  • Augmented reality (AR) model visualization
  • Cloud processing and desktop export options
  • Measurement and geolocation capabilities
Read full description

Digitize Reality: Transform your mobile device into a powerful 3D scanner. Simply point and record to create professional-grade 3D models. Pair with a compatible RTK device for centimeter-level accuracy, precise measurements, and geolocated 3D reconstructions. Visualize the captured model in the app, upload and export, and view it in AR. New ArcGIS Workflow: PIX4Dcatch now streams ArcGIS data in realtime in AR to provide in-field operators full contextual information about the entire site including 3D reconstructions and attributes. Our capture feature generates complete and defensible georeferenced 3D reconstructions which can be communicated seamlessly back to ArcGIS. New Guide-To Feature: PIX4Dcatch has a guide-to feature directing users to specified geolocated assets for staking, boosting onsite efficiency and accuracy. Just select the point or reconstruction you would like to find and follow the arrows in AR. WORKFLOW 1 – Scan & Capture Walk around your site. The app automatically gathers data and provides live feedback using iOS LiDAR, ensuring you capture every detail. For enhanced accuracy, use an RTK device compatible with PIX4Dcatch, PIX4D Autotags with a fully automated workflow, or combine both. 2 – Process, Analyze & Share Process your data by uploading to PIX4Dcloud for online analysis and sharing, or export to PIX4Dmatic for desktop processing. Both platforms offer a 14-day free trial. Projects can also be exported to third-party photogrammetry software. Measure spaces, document results, and enjoy all the benefits of a detailed 2D/3D model of your surroundings. 3 – View in AR Experience an immersive augmented-reality view. Display 3D models and points directly in your phone camera in AR. ____________________ USE CASES • Digitize construction sites • Measure stockpiles and other objects • Document underground utilities • Digitize indoor and outdoor spaces with Autotags • Visualize and verify 3D models in AR in real time • Perform single-point measurements with RTK accuracy ____________________ COMPATIBILITY • Optimized for LiDAR-equipped devices (Pro series phones) • All ARKit-enabled devices • RTK devices: Emlid Reach RX and RX2, TopCon HiPer CR, Bad Elf Flex Mini, Bad Elf Flex, Trimble DA2, Leica Zeno FLX100 ____________________ TERMS OF USE https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CSiUnits4 screens
PIX4Dcatch4 screens

Verdict

The call

The clearest difference is in-app purchases: CSiUnits at none against PIX4Dcatch's 1. CSiUnits also leads on review sentiment (50% vs 33%) and iOS requirement (9.0 vs 18.0). PIX4Dcatch's advantage is ratings volume (264 vs 4) and update cadence (every 2 weeks vs monthly). On price, rating, 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

Both are free to download. PIX4Dcatch sells 1 in-app purchase, starting at $159.00 per month. CSiUnits asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for CSiUnits against 4.7 for PIX4Dcatch. That said, the two scores are not equally well evidenced: PIX4Dcatch has 264 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 50% of CSiUnits's written reviews are positive against 33% of PIX4Dcatch's.

UpkeepUpdate frequency

CSiUnits ships an update monthly, PIX4Dcatch every 2 weeks. The most recent releases landed on September 17, 2026 and October 15, 2026 respectively.

Scorecard6 real differences · 4 level
CSiUnits versus PIX4Dcatch: the parameters behind the verdict, then further details
ParameterCSiUnitsPIX4Dcatch
PriceFreeFree
Rating4.8 (4 ratings) — better4.7 (264 ratings)
Positive reviews50.0% of reviews — better32.5% of reviews
Number of ratings4264 — better
Update frequencyMonthlyEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.0 — better18.0
Further details — not scored
Size13 MB239 MB
Age rating4+4+
DeveloperComputers and Structures, Inc.Pix4D

Customer experience

CSiUnits

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

PIX4Dcatch

All ratings264 ratings
Positive92.0%
Neutral1.5%
Negative6.4%
Written reviews40 reviews
Positive32.5%
Neutral7.5%
Negative60.0%

Bugs and requests

CSiUnits

Not enough reviews yet to summarise bugs or requests.

PIX4Dcatch

Reported bugs

18 issues
  • App crashes or shows SDK error with Emlid RX
  • Upload doesn't work for Dropbox or OneDrive
  • Mesh doesn't display like past versions
  • Cannot build an accurate model
  • App locks out
Show 13 more
  • Outputs contradict (geo tags vs GCP coordinates)
  • Cannot log into Pix account inside the app (keyboard issue)
  • Does not recognize license
  • Stopped uploading
  • Photos stored in app, impossible to get if not uploading
  • Create account impossible
  • Cannot register
  • Cannot get contact without registration
  • App unbrauchbar (unusable)
  • Trial cannot be cancelled
  • Scan took 4 days to process
  • Fatal results
  • Slow and annoying

Requested features

6 requests
  • Make it possible to work with any GNSS through NMEA Protocol
  • Export GCP's in GPS coordinates as well
  • Add instructions or tips
  • Allow export to local device instead of cloud
  • Allow export of images to PC for free
Show 1 more
  • Allow testing of 3D generation with a limit of pictures or generated 3Ds for free

In-app purchases

None

CSiUnits

No in-app purchases

1 purchases

PIX4Dcatch

Subscriptions1
  • PIX4Dcatch Professional14 Days trial$159.001 Month

Questions

Is CSiUnits free?
CSiUnits is free to download, with no in-app purchases.
Is PIX4Dcatch free?
PIX4Dcatch is free to download, with in-app purchases available.
Which has better reviews, CSiUnits or PIX4Dcatch?
CSiUnits is rated higher. CSiUnits averages 4.8 out of 5 from 4 ratings, while PIX4Dcatch averages 4.7 from 264 ratings.
Do CSiUnits or PIX4Dcatch have ads?
Neither CSiUnits nor PIX4Dcatch shows ads.
Which is updated more often, CSiUnits or PIX4Dcatch?
CSiUnits ships an update monthly, and PIX4Dcatch every 2 weeks. Most recently, CSiUnits was updated on September 17, 2026 and PIX4Dcatch on October 15, 2026.

Other comparisons