Complex RPN Calculator vs DigiTwinClient
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Complex RPN Calculator
This scientific calculator utilizes a four-level stack and natively handles complex numbers. It allows users to input and view numbers in both polar and rectangular formats, remembering its state and offering 10 memory locations.
- Complex number support
- Four-level stack
- Polar and rectangular formats
- State persistence
- 10 memory locations
- Scientific calculations
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Complex RPN Calculator is a scientific RPN calculator with a four stack whose native number is complex. You can view and enter numbers in both polar and rectangular formats. Complex RPN remembers its state between usages and has 10 memory locations.
DigiTwinClient
Create high-quality 3D digital twins of objects and scenes using your LiDAR-enabled iOS device. Transfer capture data to a companion Mac app for precise processing and export models in USDZ or OBJ formats for various industrial and creative applications.
- LiDAR 3D scanning
- Digital twin generation
- Companion Mac application
- USDZ/OBJ export
- Visual inspections
- Design review
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GridRaster is a leading Spatial AI platform transforming Industrial Enterprise Manufacturing, Operations, and Training using AI and XR. The DigiTwin Client Application on the iOS along with its companion Mac application (DigiTwin Hub) powers the state of the art 3D digital twin generation. Capture the 3D object or scene using your LiDAR enabled iOS device (iPhone Pro or iPad Pro) and quickly generate a 3D model. For even high quality, precise, and detailed 3D model, transfer the capture data to the Mac and process the data with our companion application to generate precise and accurate 3D models in minutes (see some of our sample scans downloaded with the App).The generated 3D model can be exported in USDZ or OBJ formats and can be used for various applications such as visual inspections, measurements, design review, 3D application content development, and more.Explore GR DigiTwin Suite on both your iOS device and your Mac for unparalleled accuracy and fidelity for all your 3D projects!
Screenshots
Verdict
The clearest difference is rating: DigiTwinClient at 5.0 against Complex RPN Calculator's 3.8. DigiTwinClient also leads on update cadence (every 6 weeks vs every 5 months). Complex RPN Calculator's advantage is ratings volume (22 vs 4) and iOS requirement (16.4 vs 18.0). On price, ads, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
DigiTwinClient holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Complex RPN Calculator has 22 ratings behind it against 4, so its average is the more settled of the two.
Complex RPN Calculator ships an update every 5 months, DigiTwinClient every 6 weeks. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.
| Parameter | Complex RPN Calculator | DigiTwinClient |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (22 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 51.7% of reviews | — |
| Number of ratings | 22 — better | 4 |
| Update frequency | Every 5 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 — better | 18.0 |
| Further details — not scored | ||
| Size | 1 MB | 82 MB |
| Age rating | 4+ | 4+ |
| Developer | John Coddington | Grid Raster Inc. |
Customer experience
Complex RPN Calculator
DigiTwinClient
Bugs and requests
Complex RPN Calculator
Reported bugs
6 issues- Mutes other apps when used
- Slow keyboard response after update
- X^3 calculation incorrect for large imaginary numbers
- App crashes on opening/button press (historical iOS 9 issues)
- App starts upside down in landscape on iPad (historical iOS 8 issue)
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- Unreadable fonts on iPad (historical version 1.2 issue)
Requested features
24 requests- Turn off key click sound
- Customize number display
- See the stack
- Fix slow entry response
- Fix imaginary number calculation (X^3)
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- Improve SwiftUI design (less whitespace)
- Show all stack levels
- Add angle function
- Add magnitude function
- Add 'Clear X' button
- Make RAD/DEG toggle button
- Single button for Sci/Eng/Fix/Raw modes
- Add '//' (parallel) function
- Add 'Module' button
- Change 'i' to 'j' for imaginary part
- Show stack levels
- Add log2 function
- Add logGamma function
- Smaller buttons
- Add complex conjugate button
- Add real part button
- Add imaginary part button
- Add modulo function
- Make app start faster
DigiTwinClient
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Complex RPN Calculator
No in-app purchases
DigiTwinClient
No in-app purchases
Questions
Is Complex RPN Calculator free?
Is DigiTwinClient free?
Which has better reviews, Complex RPN Calculator or DigiTwinClient?
Do Complex RPN Calculator or DigiTwinClient have ads?
Which is updated more often, Complex RPN Calculator or DigiTwinClient?
Other comparisons
